Papers and presentations

The pdf files can be downloaded based on the policy of each society. Citation index updated on October, 2003 is shown when it is over 20. Total citation is over 1030.

Regular journal papers

1. T. Baba, Y. Kokubun, T. Sakaki and K. Iga, “Loss reduction of an ARROW waveguide in shorter wavelength and its stack configuration”, IEEE/OSA J. Lightwave Technol., vol. LT-6, no. 9, pp. 1440-1445, 1988. (citation index 49)

2. T. Baba, Y. Kokubun and H. Watanabe, “Monolithic integration of ARROW-type demultiplexer and photodetector in shorter wavelength region”, IEEE/OSA J. Light-wave Technol., vol. LT-8, no. 1, pp. 99-104, 1990. (citation index 27)

3. T. Baba and Y. Kokubun, “High efficiency light coupling from antiresonant reflecting optical waveguide to integrated photodetector using anti-reflecting layer”, Appl. Opt., vol. 29, no. 18, pp. 2781-2792, 1990. (citation index 21)

4. T. Baba and Y. Kokubun, “Scattering loss of antiresonant reflecting optical waveguides”, IEEE/OSA J. Lightwave Technol., vol. 9, no. 5, pp. 590-597, 1991.

5. T. Baba, T. Hamano, F. Koyama and K. Iga, “Spontaneous emission factor of a microcavity DBR surface emitting laser”, IEEE J. Quantum Electron., vol. 27, no. 6, pp. 1347-1358, 1991. (citation index 138)

6. T. Baba, T. Hamano, F. Koyama and K. Iga, “Spontaneous emission factor of a microcavity DBR surface emitting laser (II) --- effect of electron quantum confinements ---”, IEEE J. Quantum Electron., vol. 28, no. 5, pp. 1310-1319, 1992. (citation index 31)

7. A. Sasaki, T. Baba and K. Iga, “Focusing characteristics of convex-shaped distributed-index microlens”, Jpn. J. Appl. Phys., vol. 31, no. 5B, pp. 1611-1617, 1992.

8. K. Murashige, A. Akiba, T. Baba and K. Iga, “Parallel optical Walsh expansion in a pattern recognition preprocessor using planar microlens array”, Jpn. J. Appl. Phys., vol. 31, no. 5B, pp. 1666-1671, 1992.

9. T. Baba and Y. Kokubun, “Dispersion and radiation loss characteristics of antiresonant reflecting optical waveguides --- numerical analysis and approximate expressions ---”, IEEE J. Quantum Electron., vol. 28, no. 7, pp. 1689-1700, 1992. (citation index 30)

10. S. Tamura, T. Baba and Y. Kokubun, “Selective formation of dielectric film on vertical surface for photonic integrated circuits”, IEEE J. Quantum Electron., vol. 28, no. 7, pp. 1727-1731, 1992.

11. D. Intani, T. Baba and K. Iga, “Planar microlens relay optics utilizing lateral focusing”, Appl. Opt., vol. 31, no. 25, pp. 5255-5258, 1992.

12. A. Sasaki, T. Baba and K. Iga, “Self alignment technique by put-in microconnector”, Optics (Kogaku), vol. 22, no. 8, pp. 477-481, 1993 (in Japanese).

13. T. Baba, Y. Yogo, K. Suzuki, F. Koyama and K. Iga, “First room temperature cw operation of GaInAsP/InP surface emitting laser”, IEICE Trans. Electron., vol. E76-C, no. 9, pp. 1423-1424, 1993.

14. T. Baba, Y. Yogo, K. Suzuki, F. Koyama and K. Iga, “Low threshold 1.3mm circular planar buried heterostructure surface emitting lasers”, IEICE Trans. Electron., vol. J76-C, no. 10, pp. 367-374, 1993 (in Japanese).

15. T. Baba, Y. Yogo, K. Suzuki, F. Koyama and K. Iga, “Continuous wave GaInAsP/InP surface emitting laser with a thermally conductive MgO/Si multilayer mirror”, Jpn. J. Appl. Phys., vol. 33, no. 4A, pp. 1905-1909, 1994.

16. D. Intani, T. Baba and K. Iga, “Simple optical wavelength-division multiplexer component that uses the lateral focusing scheme of a planar microlens”, Appl. Opt., vol. 33, no. 16, pp. 3405-3408, 1994.

17. T. Hamano, T. Baba and K. Iga, “Change of spontaneous emission and light output in microcavity surface emitting lasers under different boundary conditions”, IEICE Trans. Electron., vol. J78-C-I, no. 2, pp. 80-87, 1995 (in Japanese).

18. T. Baba and M. Koma, “Possibility of InP-based 2-dimensional photonic crystal --- an approach by anodization technique ---”, Jpn. J. Appl. Phys., vol. 34, no. 2B, pp. 1405-1408, 1995.

19. T. Baba, T. Kondo, F. Koyama and K. Iga, “Finite element analysis of thermal characteristics in continuous wave long wavelength surface emitting lasers (I) --- dielectric cavity structures---”, Opt. Rev., vol. 2, no. 2, pp. 123-127, 1995.

20. T. Baba, R. Watanabe, K. Asano, F. Koyama and K. Iga, “Theoretical and experimental estimations of photon recycling effect in light emitting devices with a metal mirror”, Jpn. J. Appl. Phys., vol. 35, no. 1A, pp. 97-100, 1996.

21. T. Baba and T. Matsuzaki, “Fabrication and photoluminescence studies of GaInAsP/InP 2-dimensional photonic crystals”, Jpn. J. Appl. Phys., vol. 35, no. 2B, pp. 1348-1352, 1996. (citation index 21)

22. T. Baba, M. Hamasaki, N. Watanabe, P. Kaewplung, A. Matsutani, T. Mukaihara, F. Koyama and K. Iga, “A novel short cavity laser with deep grating distributed Bragg reflectors”, Jpn. J. Appl. Phys., vol. 35, no. 2B, pp. 1390-1394, 1996. (citation index 51)

23. T. Baba, T. Matsuzaki, N. Kamizawa and M. Ikeda, “GaInAsP/InP 2-D photonic crystals”, Optics (Kogaku), vol. 25, no. 7, pp. 409-415, 1996 (in Japanese).

24. T. Baba, N. Kamizawa and M. Ikeda, “Nanofabrication process of GaInAsP/InP 2D photonic crystals by a methane-based reactive ion beam etching technique”, Physica B, vol. 227, pp. 415-418, 1996.

25. T. Baba, “Photonic crystals and microdisk cavities based on GaInAsP/InP system”, IEEE J. Selected Topics in Quantum Electron., vol. 3, no. 3, pp. 808-830, 1997 (Invited paper). (citation index 53)

26. A. Sakai, H. Yamada, M. Fujita and T. Baba, “Proposal of optical near field probe using evanescent field of microdisk lasers”, Jpn. J. Appl. Phys., vol. 37, no. 2A, pp. 517-521, 1998.

27. M. Fujita, A. Sakai and T. Baba, “Ultra-small and ultra-low threshold microdisk injection laser --- design, fabrication, lasing characteristics and spontaneous emission factor”, IEEE J. Selected Topics in Quantum Electron., vol. 5, no. 6, pp. 673-681, 1999. (citation index 21)

28. A. Sakai and T. Baba, “FDTD simulation of photonic devices and circuits based on circular and fan-shaped disks”, IEEE/OSA J. Lightwave Technol., vol. 17, no. 8, pp. 1493-1499, 1999.

29. J. Yonekura, M. Ikeda and T. Baba, “Analysis of finite 2-D photonic crystals of columns and lightwave devices using the scattering matrix method”, IEEE/OSA J. Lightwave Technol., vol. 18, no. 8, pp. 1500-1508, 1999. (citation index 31)

30. T. Baba, K. Inoshita, H. Tanaka, J. Yonekura, M. Ariga, A. Matsutani, T. Miyamoto, F. Koyama and K. Iga, “Strong enhancement of light extraction efficiency in GaInAsP 2-D photonic crystals of columns”, IEEE/OSA J. Lightwave Technol., vol. 17, no. 11, pp. 2113-2120, 1999.

31. N. Fukaya, D. Ohsaki and T. Baba, “2-D photonic crystal waveguides with 60-degree-bends in a thin slab structure”, Jpn. J. Appl. Phys., vol. 39, no. 5A, pp. 2619-2623, 2000.

32. M. Ariga, Y. Sekido and T. Baba, “Low threshold GaInAsP lasers with semiconductor/air DBR fabricated by inductively coupled plasma etching”, Jpn. J. Appl. Phys., vol. 39, no. 6A, pp. 3406-3409, 2000.

33. T. Baba and N. Fukaya, “Light propagation characteristics of defect waveguides in a photonic crystal slab”, Photonic Crystals and Light Localization (Ed. M. Soukoulis), pp. 105-116, Kluwer Academic, 2001.

34. T. Baba and D. Ohsaki, “Interfaces of photonic crystals for high efficiency light transmission”, Jpn. J. Appl. Phys., vol. 40, 2001.

35. M. Fujita and T. Baba, “Proposal and FDTD simulation of whispering gallery mode microgear cavity”, IEEE J. Quantum Electron., vol. 37, no. 10, pp. 1253-1258, 2001.

36. A. Sakai, T. Fukazawa and T. Baba, “Low loss ultra-small branches in Si photonic wire waveguides”, IEICE Trans. Electron., vol. E85-C, no. 4, pp. 1033-1038, 2002.

37. T. Baba, A. Motegi, T. Iwai, N. Fukaya, Y. Watanabe and A. Sakai, “Light propagation characteristics of straight single line defect optical waveguides in a photonic crystal slab fabricated into a silicon-on-insulator substrate, “ IEEE J. Quantum Electron., vol. 38, no. 7, pp. 743-752, 2002.

38. T. Baba and M. Nakamura, “Photonic crystal light deflection devices using the superprism effect”, IEEE J. Quantum Electron., vol. 38, no. 7, pp. 909-914, 2002.

39. R. Ushigome, M. Fujita and T. Baba, “GaInAsP microdisk Injection laser with Benzocyclobutene polymer cladding and its athermal effect”, Jpn. J. Appl. Phys., vol. 41, no. 11, 2002.

Journal letters

1. Y. Kokubun, T. Baba and K. Iga, “Silicon optical printed circuit board for three-dimensional integrated optics”, Electron. Lett., vol. 21, no. 11, pp. 508-509, 1985.

2. Y. Kokubun, T. Baba, T. Sakaki and K. Iga, “Low loss antiresonant reflecting optical waveguide on Si substrate in visible-wavelength region”, Electron. Lett., vol. 22, no. 22, pp. 892-893, 1986. (citation index 34)

3. T. Baba and Y. Kokubun, “New polarization-insensitive antiresonant reflecting optical waveguide (ARROW-B)”, IEEE Photon. Technol. Lett., vol. 1, no. 8, pp. 232-234, 1989. (citation index 23)

4. T. Baba, S. Tamura, Y. Kokubun and S. Watanabe, “Monolithic integration of multilayer filter on vertical surface of semiconductor substrate by a bias-sputtering technique”, IEEE Photon. Technol. Lett., vol. 2, no. 3, pp. 191-193, 1990.

5. M. Shimizu, T. Mukaihara, T. Baba and K. Iga, “A method of polarization stabilization in surface emitting lasers”, Jpn. J. Appl. Phys., vol. 30, no. 6A, pp. L1015-L1017, 1991.

6. A. Sasaki, T. Baba and K. Iga, “Put-in micro-connector for alignment-free coupling of optical fiber array”, IEEE Photon. Technol. Lett., vol. 4, no. 8, pp. 908-911, 1992.

7. T. Baba, K. Suzuki, Y. Yogo, K. Iga and F. Koyama, “Threshold reduction of GaInAsP/InP circular buried heterostructure surface emitting laser by a single step PBH regrowth”, Electron. Lett., vol. 29, no. 4, pp. 331-332, 1993.

8. T. Baba, K. Matsuoka, F. Koyama and K. Iga, “A low threshold 1.3 mm GaInAsP/InP flat-surface circular buried heterostructure surface emitting laser”, Jpn. J. Appl. Phys., vol. 32, no. 3A, pp. 1126-1127, 1993.

9. T. Baba, Y. Yogo, K. Suzuki, F. Koyama and K. Iga, “Near room temperature continuous wave lasing characteristics of GaInAsP/InP surface emitting laser”, Electron. Lett., vol. 29, no. 9, pp. 913-914, 1993. (citation index 48)

10. T. Baba, Y. Yogo, K. Suzuki, K. Iga and F. Koyama, “GaInAsP/InP low-mesa CPBH surface emitting laser with an optimally deposited MgO/Si multilayer laser mirror”, Jpn. J. Appl. Phys., vol. 32, no. 6A, pp. 2692-2694, 1993.

11. T. Baba, K. Suzuki, Y. Yogo, K. Iga and F. Koyama, “Low threshold room temperature pulsed and ---57℃ cw operations of 1.3 mm GaInAsP/InP circular planar buried heterostructure surface emitting lasers”, IEEE Photon. Technol. Lett., vol. 5, no. 7, pp. 744-746, 1993.

12. S. Asakawa, Y. Kokubun, M. Ohyama and T. Baba, “Three-dimensional optical inter-connects by stacked ARROW waveguides”, Electron. Lett., vol. 29, no. 16, pp. 1485-1486, 1993.

13. T. Baba, Y. Yogo, K. Suzuki, F. Koyama and K. Iga, “First room temperature cw operation of GaInAsP/InP surface emitting laser”, IEICE Trans. Electron., vol. E76-C, no. 9, pp. 1423-1424, 1993.

14. T. Mukaihara, N. Ohnoki, T. Baba, F. Koyama and K. Iga, “A novel birefringent distributed Bragg reflector using a metal/dielectric polarizer for polarization control of surface-emitting lasers”, Jpn. J. Appl. Phys., vol. 33, no. 2B, pp. L227-L229, 1994.

15. T. Baba, Y. Yogo, K. Suzuki, T. Kondo, F. Koyama and K. Iga, “1.3 mm vertical cavity surface emitting laser array for parallel optical fiber transmissions”, IEICE Trans. Electrons., vol. E77-C, no. 2, pp. 201-203, 1995.

16. T. Baba, T. Kondo, F. Koyama and K. Iga, “Finite element analysis of thermal characteristics in continuous wave long wavelength surface emitting laser (II) --- semiconductor cavity structures ---”, Opt. Rev., vol. 2, no. 4, pp. 323-325, 1995.

17. T. Baba and T. Matsuzaki, “Theoretical calculation of photonic gap in semiconductor 2-dimensional photonic band structures with various shapes of optical atoms”, Jpn. J. Appl. Phys., vol. 34, no. 8B, pp. 4496-4498, 1995.

18. T. Baba and T. Matsuzaki, “Polarization change in spontaneous emission from GaInAsP/InP 2-dimensional photonic crystals”, Electron. Lett., vol. 31, no. 20, pp. 1776-1778, 1995.

19. T. Baba, M. Fujita, A. Sakai, M. Kihara and R. Watanabe, “Lasing characteristics of GaInAsP/InP strained quantum-well microdisk injection lasers with diameter of 2--10 mm”, IEEE Photon. Technol. Lett., vol. 9, no. 7, pp. 878-880, 1997. (citation index 35)

20. M. Fujita, K. Inoshita and T. Baba, “Room temperature continuous wave lasing characteristics of GaInAsP/InP microdisk injection laser”, Electron. Lett., vol. 25, no. 3, pp. 278-279, 1998.

21. H. Yamada, A. Sakai, M. Fujita and T. Baba, “Optical near field probe action in a microdisk injection laser with 0.12l resolution”, Electron. Lett., vol. 27, no. 3, pp. 222-223, 1999.

22. T. Baba, N. Fukaya and J. Yonekura, “Observation of light transmission in photonic crystal waveguides with bends”, Electron. Lett., vol. 27, no. 8, pp. 654-655, 1999. (citation index 91)

23. M. Fujita, R. Ushigome and T. Baba, “Continuous wave lasing in GaInAsP microdisk injection laser with threshold current of 40 mA”, Electron. Lett., vol. 36, no. 9, pp. 790-791, 2000.

24. T. Baba, H. Yamada and A. Sakai, “Direct observation of lasing mode in a microdisk laser by a near-field-probing technique”, Appl. Phys. Lett., vol. 77, no. 11, pp. 1584-1586, 2000.

25. H. Ichikawa, K. Inoshita and T. Baba, “Reduction in surface recombination of GaInAsP/InP Micro-Columns by CH4 plasma irradiation”, Appl. Phys. Lett., vol. 78, no. 15, pp. 2119-2121, 2001.

26. A. Sakai, G. Hara and T. Baba, “Propagation characteristics of ultra-high D optical waveguide on silicon-on-insulator substrate”, Jpn. J. Appl. Phys., vol. 40, no. 4B, pp. L383-L385, 2001.

27. M. Fujita, R. Ushigome and T. Baba, “Large spontaneous emission factor of 0.1 in a microdisk injection laser”, IEEE Photon. Technol. Lett., vol. 13, no. 5, pp. 403-405, 2001.

28. T. Baba, N. Fukaya and A. Motegi, “Clear correspondence between theoretical and experimental light propagation characteristics in photonic crystal waveguides”, Electron. Lett., vol. 37, no. 12, pp. 761-762, 2001.

29. M. Fujita, K. Teshima and T. Baba, “Low threshold continuous wave lasing in photo-pumped GaInAsP microdisk lasers”, Jpn. J. Appl. Phys., vol. 40, no.8B, pp. L875 - L877, 2001.

30. M. Fujita, R. Ushigome, T. Baba, A. Matsutani, F. Koyama and K. Iga, “GaInAsP microcylinder (microdisk) injection laser with AlInAs(Ox) claddings”, Jpn. J. Appl. Phys., vol. 40, no. 9A, pp. 5338-5339, 2001.

31. M. Fujita, R. Ushigome and T. Baba, “Strain relaxation effect in microdisk lasers with compressively-strained quantum wells”, Appl. Phys. Lett., vol. 80, no. 9, pp. 1511-1513, 2002.

32. M. Fujita and T. Baba, “Microgear laser”, Appl. Phys. Lett., vol. 80, no. 12, pp. 2051-2053, 2002.

33. T. Baba and T. Matsumoto, “Resolution of photonic crystal superprism”, Appl. Phys. Lett., vol. 81, no. 13, pp. 2325-2327, 2002.

34. K. Aoki, H. T. Miyazaki, H. Hirayama, K. Inoshita, T. Baba, N. Shinya and Y. Aoyagi, "3D photonic crystals fabricated by micromanipulation technique", Appl. Phys. Lett., vol. 81, no. 17, pp. 3122-3124, 2002.

35. T. Fukazawa, A. Sakai and T. Baba, “H-tree-type optical clock signal distribution circuit by a Si photonic wire waveguide”, Jpn. J. Appl. Phys., vol. 41, 2002.

Books

1. Y. Kokubun and T. Baba, “Fundamentals of optical waveguides”, Physics on Micro-Optics, pp. 17-40, Asakura Shoten, 1991 (in Japanese).

2. T. Baba and K. Iga, “Spontaneous emissions in microcavity surface emitting lasers”, Spontaneous emission and laser operation in microcavities (Edited by K. Ujihara and H. Yokoyama), pp. 237-273, CRC Press, 1995.

3. T. Baba and T. Matsuzaki, “GaInAsP/InP 2-dimensional photonic crystals”, Microcavities and Photonic Bandgaps (Edited by J. Rarity and C. Weisbuch), pp. 193-202, Kluwer Academic Publishers, The Netherlands, 1996.

4. T. Baba, “Electron-photon interaction in photonic crystals”, Mesoscopic Physics and Electronics (Edited by T. Ando, Y. Arakawa, K. Furuya, S. Komiyama and H. Nakashima), Springer Verlag, Berlin, pp. 167-175, 1997.

5. T. Baba, “Surface emitting lasers and spontaneous emission control”, Fundamentals and applications of surface emitting lasers (Edited by K. Iga and F. Koyama), pp. 159-179, Kyoritsu Shuppan, 1999 (in Japanese).

6. T. Baba, “Spontaneous emission controlled photonic devices”, Handbook on Quantum Engineering (Edited M. Ohtsu and Y. Arakawa), pp. 508-534, Asakura Shoten, 1999 (in Japanese).

7. T. Baba and N. Fukaya, “Light propagation characteristics of defect waveguides in a photonic crystal slab”, Photonic Crystals and Light Localization (Ed. M. Soukoulis), pp. 105-116, Kluwer Academic, 2001.

8. T. Baba, “A review on semiconductor photonic crystal light emitters”, “Photonic crystal point defect lasers”, Fundamentals and Application to Photonic Devices (Edited by S. Kawakami), pp. 185-205, CMC Books, 2002 (in Japanese).

9. S. Noda and T. Baba, Eds., Roadmap on Photonic Crystals, Kluwer Academic, 2003.

10. T. Baba, “Photonic bands”, “Photonic crystals”, Introduction to Visual Science (Edited by K. Takayanagi), Jitsugyo Books, 2002 (in Japanese).

Invited papers at international conferences

1. Y. Kokubun and T. Baba, “ARROW and its application to integrated photonic devices”, Third Optoelectronic Conf., Makuhari, no. 13B4-2, 1990.

2. K. Iga and T. Baba, “Self aligned fiber micro connectors”, 11th Gradient-Index Optical Systems Topical Meeting, Rochester, no. GWC2, 1994.

3. F. Koyama, T. Baba and K. Iga, “Present status and future prospects of long wavelength surface emitting lasers”, 20th European Conf. Opt. Commun., Firenze, no. Tu.B.4.1, 1994.

4. T. Baba and T. Matsuzaki, “2D photonic crystal with multiple refractive index steps”, NATO Advanced Research Workshop “Photonic Bandgap Materials”, Crete, p. 18, 1995.

5. T. Baba, “GaInAsP/InP photonic crystals”, NATO Advanced Research Workshop “Quantum Optics in Wavelength Scale Structures”, Corsica, no. VII-1, 1995.

6. T. Baba, “Photonic band and whispering gallery mode emitters”, 10th IEEE/LEOS Annual Meeting, San Francisco, no. WA-1, 1997.

7. T. Baba, M. Ikeda, N. Kamizawa and H. G. Blom, “Semiconductor 2-D photonic crystals”, 17th Electronic Materials Symposium, Izunagaoka, no. G1, 1998.

8. T. Baba, “Photoluminescence in GaInAsP/InP 2-D photonic crystals”, Workshop on Electromagnetic Crystal Systems, Los Angels, no. IV-4, 1999.

9. T. Baba, “Ultra-small and ultra-low-threshold microdisk injection lasers with evanescent coupled elements”, Int. Photon. Res. Conf., Santa Barbara, no. RTuB2, 1999.

10. T. Baba, N. Fukaya and J. Yonekura, “Observation of light propagation in 2-D photonic crystal optical waveguides with bends”, Int. Photon. Res. Conf., Santa Barbara, no. RTuE3, 1999.

11. T. Baba, “Light emission and waveguiding in semiconductor photonic crystals”, Int. Conf. Solid State Devices and Materials, Tokyo, no. D-8-4, 1999.

12. T. Baba, “Fabrication and characterization of photonic bandgap materials”, Int. Conf. Ternary and Multinary Compounds, Taiwan, no. Th-B3-1, 1999.

13. T. Baba, M. Fujita and A. Sakai, “Microdisk-based Photonics”, Int. Sympo. Ultra-Parallel Optoelectronics, Kawasaki, no. C-3, 2000.

14. T. Baba, “Control of light emission and guiding in 2-D photonic crystals”, Int. Workshop on Photonic and Electromagnetic Crystal Structures, Sendai, no. W2-2, 2000.

15. T. Baba, N. Fukaya and D. Ohsaki, “Light propagation characteristics in defect waveguides in a photonic crystal states”, NATO Advanced Research Workshop “Photonic Crystals and Light Localization”, Crete, no. Th-7, 2000.

16. T. Baba, “Photonic crystals by planar technologies”, Optoelectronic Conf., Makuhari, no. 12D-1-3, 2000.

17. T. Baba, “Photonic microstructures --- microdisk lasers and photonic waveguides”, IEEE/LEOS Annual Meeting, Puerto Rico, no. WK-1, 2000.

18. T. Baba, “Recent development of microdisk lasers and waveguides”, Int. Topical Meet. Indium Phosphide and Related Mat., Nara, no. Tu-B-2, 2001.

19. T. Baba, “Light propagation characteristics of microguides in photonic crystal slabs”, Int. Workshop on Photonic and Electromagnetic Crystal Structures, St. Andrews, no. II-6, 2001.

20. T. Baba, N. Fukaya and A. Motegi, “Light propagation characteristics in photonic crystal waveguides”, Conf. on Laser and Electro-Optics Pacific Rim, Makuhari, no. TuA4-5, 2001.

21. T. Baba, “Photonic crystals and microlasers”, Asia-Pacific Radio Science Conf., Tokyo, no. D1-1-1, 2001.

22. T. Baba, “Photonic lasers and waveguides”, Korean Photon. Conf., Taejon, 2001.

23. T. Baba, “Photonic micro/nanostructures for PBG and index confinements”, Int. Sympo. Contemporary Photon. Technol., Tokyo, no. K-3, 2002.

24. T. Baba, “Light transmission in photonic bandgap waveguides and photonic band crystals”, SPIE “Active and Passive Optical Components for WDM Communication II”, Boston, 2002.

25. T. Baba, “Photonic crystals and microlasers”, IEEE/LEOS Annual Meet., Glasgow, no. WS-1, 2002.

26. T. Baba, K. Inoshita, D. Sano, A. Nakagawa and K. Nozaki, “Microlasers based on photonic crystal concept”, SPIE "Photonic Crystal Materials and Devices", San Jose, no. 5000-05, 2003.

27. T. Baba, “Progress in microdisk and related lasers”, Int. Sympo. Nanotechnology for Photonics and Opto-Electronics, Tokyo, no. 12, 2003.

28. T. Baba, “Photonic crystals and micro-/nano-lasers”, JSPS-Sweden Colloquium, Stockholm, no. 2-2, 2003.

29. T. Baba, K. Inoshita, T. Matsumoto, H. Ichikawa and T. Iwai, “Device applications of semiconductor photonic crystal”, Int. Sympo. Femto-Second Technol., Makuhari, no. TD-3, 2003.

30. T. Baba, K. Inoshita, T. Matsumoto, D. Mori, H. Ichikawa and T. Iwai, “Semiconductor photonic crystal and nanostructure devices”, IEEE/LEOS Opt. MEMS, Hawaii, no. WA-1, 2003.

31. T. Baba, “Semiconductor photonic crystal devices”, Int. Conf. Solid State Devices and Mat., Tokyo, no. F-7, 2003.

32. T. Baba, “Light propagation and localization in photonic crystals”, Progress in Electromagnetic Res. Sympo., Hawaii, no. 2003-10-14-2-10, 2003.

33. T. Baba, “Photonic crystals and high index contrast devices”, IEEE/LEOS Annual Meet., Arizona, no. S102, 2003 (Short Course Lecture).

34. T. Baba, K. Inoshita and Y. Kuroki, “Photonic crystal nanolasers utilizing cutoff condition of line defect”, Int. Sympo. Quantum Dots and Photonic Crystals, 2003.

35. T. Baba, “Ultra-small light emitting devices”, Fall Meet. Material Res. Soc., Boston, 2003.

36. T. Baba, “Micro/nano-photonic science and technologies”, Japanese-American Frontiers of Science, Shonan, 2003.

Contributed papers at international conferences

1. Y. Kokubun, T. Baba, T. Sakaki and K. Iga, “Low loss anti-resonant reflecting optical waveguide on a Si substrate in visible wavelength region”, First Optoelectronic Conf., Tokyo, no. A3-2, 1986.

2. Y. Kokubun, T. Baba and K. Iga, “Uncoupled stacking of parallel ARROW's for 3-dimensional optical wiring”, 12th European Conf. on Opt. Commun., Barcelona, no. Tu-C3, 1986.

3. Y. Kokubun, T. Baba, H. Watanabe and K. Iga, “Monolithic integration of ARROW-type demultiplexer and photodetector”, 14th European Conf. on Opt. Commun., Brighton, pp. 231-234, 1988.

4. T. Baba, Y. Kokubun and Y. Mera, “A novel 3-dimensional ARROW by thin film patterning ---stripe lateral confinement of ARROW ---”, 10th Topical Meeting on Integrated and Guided Wave Optics, Houston, no. TuBB-5, 1989.

5. T. Baba and Y. Kokubun, “New polarization-insensitive anti-resonant reflecting optical waveguide (ARROW-B)”, 12th Conf. on Opt. Fiber Commun., Houston, no. WQ-16, 1989.

6. T. Baba, S. Tamura, Y. Kokubun and S. Watanabe, “Monolithic integration of multilayer filter and waveguide photodetector”, First Topical Meeting on Integrated Photonics Research, South Carolina, no. Tu-A2, 1990.

7. T. Baba, S. Asakawa and Y. Kokubun, “Scattering loss of antiresonant reflecting optical waveguides”, Third Optoelectronic Conf., Makuhari, no. 12C1-2, 1990.

8. T. Baba, T. Hamano, F. Koyama and K. Iga, “Spontaneous emission factor in a micro-cavity DBR surface emitting laser”, 16th European Conf. on Opt. Commun., Amsterdam, no. ThG-1.3 (Post-Deadline Paper), 1990.

9. D. Intani, A. Akiba, T. Baba and K. Iga, “Planar microlens relay optics utilizing lateral focusing”, 9th Gradient-Index Optical Systems Topical Meeting, Monterey, no. MD4-4, 1991.

10. T. Baba, T. Hamano, F. Koyama and K. Iga, “Spontaneous emission factor and lifetime of a microcavity DBR surface emitting laser with quantum wire structures”, 11th Conf. on Lasers and Electro-Optics, Baltimore, no. JTh-C4, 1991.

11. T. Baba, T. Hamano, F. Koyama and K. Iga, “Spontaneous emission factor of a microcavity DBR surface emitting laser”, IEEE/LEOS Semiconductor Laser Workshop, Baltimore, no. 1, 1991.

12. A. Sasaki, T. Baba and K. Iga, “Focusing characteristics of a planar microlens with swelled structure”, 3rd Micro-Optics Conf., Yokohama, no. F3 1991.

13. T. Hamano, T. Baba, F. Koyama and K. Iga, “Estimation of spontaneous emission factor and lifetime in microcavity surface emitting lasers”, 3rd Micro-Optics Conf., Yokohama, no. J4 1991.

14. T. Hamano, T. Sakaguchi, T. Baba and K. Iga, “Extremely intense photoluminescence from GaAs loaded by AlAs/GaAlAs distributed Bragg reflector,” 11th Alloy Semiconductor Phys. Electron. Sympo., Kyoto, pp. 541-544, 1992.

15. T. Baba, K. Matsuoka, F. Koyama and K. Iga, “Low threshold 1.3 mm GaInAsP/InP flat-surface buried heterostructure surface emitting laser”, 4th Optoelectronic Conf., Makuhari, no. 16C2-3, 1992.

16. A. Sasaki, T. Baba and K. Iga, “Put-in micro-connectors for alignment-free coupling of optical fiber array”, 4th Optoelectronic Conf., Makuhari, no. 16B3-5, 1992.

17. A. Sasaki, T. Baba and K. Iga, “A new self-aligning scheme of optical fiber array using put-in micro-connectors”, 18th European Conf. on Opt. Commun., Berlin, no. Tu A-7.4, 1992.

18. K. Murashige, T. Baba and K. Iga, “Parallel optical Walsh expansion in optical preprocessor for pattern recognition system”, 10th Gradient-Index Optical Systems Topical Meeting, San Tiago de Compostela, no. T.7.3, 1992.

19. D. Intani, T. Baba and K. Iga, “A new optical WDM component based on planar microlens relay optics using lateral focusing”, 10th Gradient-Index Optical Systems Topical Meeting, San Tiago de Compostela, no. T.2.PD8 (Post-Deadline Paper), 1992.

20. S. Tamanuki, M. Kato, Y. Kaneko, H. Maekawa, T. Baba, F. Koyama and K. Iga, “Threshold reduction of InGaAs GaAlAs quantum well lasers using AlAs GaAs multi-layer Bragg reflectors,” 16th Conf. on Opt. Fiber Commun. and Conf. on Integrated Optics and Opt. Commun., San Jose, no. ThB3, 1993.

21. T. Baba, Y. Yogo, K. Suzuki, F. Koyama and K. Iga, “Low threshold room temperature pulsed and --31ºC cw operations of 1.3 mm GaInAsP/InP buried heterostructure surface emitting lasers”, 16th Conf. on Optical Fiber Commun. and Conf. on Integrated Optics and Opt. Commun., San Jose, no. PD-28 (Post-Deadline Paper), 1993.

22. T. Baba, Y. Yogo, K. Suzuki, F. Koyama and K. Iga, “First room temperature cw operation of GaInAsP/InP surface emitting laser”, 4th Quantum Optoelectronics Topical Meeting, Palm Springs, no. PD2 (Post-Deadline Paper), 1993.

23. T. Baba, K. Suzuki, Y. Yogo, K. Iga and F. Koyama, “Threshold reduction of GaInAsP/InP circular buried heterostructure surface emitting laser by a single step PBH regrowth”, 4th Quantum Optoelectronics Topical Meeting, Palm Springs, no. QTh-A2, 1993.

24. S. Asakawa, Y. Kokubun, T. Baba and M. Ohyama, “Three-dimensional optical interconnects by stacked ARROW waveguides”, 4th Topical Meeting on Integrated Photonics Research, Palm Springs, no. ITuE4, 1993.

25. T. Baba, Y. Yogo, K. Suzuki, F. Koyama and K. Iga, “Room temperature continuous wave lasing characteristics of GaInAsP/InP surface emitting laser”, 4th Micro-Optics Conf. and 11th Gradient-Index Optical Systems Topical Meeting, Kawasaki, no. F2, 1993.

26. T. Hamano, T. Baba and K. Iga, “Further consideration on mode density distribution and spontaneous emission behavior of microcavity DBR surface emitting lasers”, 4th Micro-Optics Conf. and 11th Gradient-Index Optical Systems Topical Meeting, Kawasaki, no. G15, 1993.

27. A. Sasaki, T. Kato, T. Baba and K. Iga, “Improved put-in micro-connectors for low-loss alignment-free optical coupling of fiber-to-microlens arrays”, 4th Micro-Optics Conf. and 11th Gradient-Index Optical Systems Topical Meeting, Kawasaki, no. L3, 1993.

28. H. Okano, K. Nakagawa, T. Katayama, T. Baba and K. Iga, “Post processors for parallel image recognition system using planar microlens array”, 4th Micro-Optics Conf. and 11th Gradient-Index Optical Systems Topical Meeting, Kawasaki, no. G22, 1993.

29. T. Hamano, T. Baba and K. Iga, “Driving level dependence of spontaneous emission factor in microcavity Room temperature continuous wave lasing characteristics of GaInAsP/InP surface emitting laser”, IEEE/LEOS Annual Meeting, Boston, no. SCL4.6, 1993.

30. T. Mukaihara, N. Ohnoki, T. Baba, F. Koyama and K. Iga, “A novel polarization control structures for surface emitting lasers by a birefringent distributed Bragg reflector with a metal/dielectric polarizer”, 14th Conf. on Lasers and Electro-Optics, Anaheim, no. CMI-2, 1994.

31. T. Kato, T. Baba and K. Iga, “A new put-in micro-connector-II using GRIN microlenses”, 11th Gradient-Index Optical Systems Topical Meeting, Rochester, no. GWC3, 1994.

32. T. Baba, R. Watanabe, K. Asano, N. Ishibashi, F. Koyama and K. Iga, “Observation of photon recycling effect in quasi-closed cavity light emitters”, 5th Optoelectronic Conf., Makuhari, no. 14D4-2, 1994.

33. T. Hamano, T. Baba, F. Koyama and K. Iga, “Spontaneous emission factors and its injection level dependencies of microcavity surface emitting lasers using quantum-films and boxes”, 5th Optoelectronic Conf., Makuhari, no. 14D4-3, 1994.

34. T. Kato, T. Baba and K. Iga, “A self-aligning optical coupling method using put-in micro-connector-II”, 5th Optoelectronic Conf., Makuhari, no. 15E3-3, 1994.

35. T. Baba and M. Koma, “InP based 2-dimensional photonic band structure --- fabrication by anodization method and design ---”, 12th Int. Conf. Solid State Devices and Materials, Yokohama, no. PB3-2, 1994.

36. T. Baba and T. Matsuzaki, “Theoretical calculation of photonic gap in 2D photonic band structures with various shapes of optical atoms”, Int. Workshop Mesoscopic Phys. Electron., no. J-2, 1995.

37. T. Baba, T. Kondo, F. Koyama and K. Iga, “Finite element analysis of thermal characteristics in GaInAsP/InP surface emitting lasers --- comparison between dielectric and semiconductor cavities ---”, First Conf. Laser and Electro-Optics Pacific Rim., Makuhari, no. P23, 1995.

38. T. Baba and T. Matsuzaki, “Polarization controlled spontaneous emission from a GaInAsP/InP strained QW 2D photonic crystal”, 13th Int. Conf. Solid State Devices and Materials , Osaka, no. S-VI-11, 1995.

39. T. Baba, M. Hamasaki, N. Watanabe, A. Matsutani, T. Mukaihara, F. Koyama and K. Iga, “A novel short cavity laser with deep grating DBRs”, 13th Int. Conf. Solid State Devices and Materials, Osaka, no. PD-5-4, 1995.

40. T. Baba and T. Matsuzaki, “Gradient-index photonic crystals for the control of photonic band diagrams”, 5th Microoptic Conf., Hiroshima, no. B2, 1995.

41. T. Baba, N. Kamizawa and A. Ikeda, “Nanofabrication process of GaInAsP/InP 2D photonic crystals by a methane-based reactive ion beam etching technique”, 3rd Int. Sympo. on New Phenomena in Mesoscopic Structures, Hawaii, no. P01, 1995.

42. R. Watanabe, M. Kihara and T. Baba, “A consideration of ultimate optical confinement semiconductor lasers”, 13th Semiconductor Laser Int. Sympo., Yokohama, no. 23, 1996.

43. M. Kihara, R. Watanabe and T. Baba, “Lasing characteristics of strained-quantum well microdisk injection lasers”, First Optoelectronic and Commun. Conf., Makuhari, no. 16D1-2, 1996.

44. S. Niida, T. Tohyama, T. Baba and Y. Kokubun, “Precise control of vertical surface selective deposition (VSSD) of dielectric film by dual ion-beam sputtering technique”, First Optoelectronic and Commun. Conf., Makuhari, no. 18P-1, 1996.

45. M. Hamasaki, P. Kaewplung, T. Baba, A. Matsutani, F. Koyama and K. Iga, “Improved GaInAsP/InP deep grating DBR for monolithic short cavity lasers”, First Optoelectronic and Commun. Conf., Makuhari, no. 18P-31, 1996.

46. T. Baba, M. Kihara and R. Watanabe, “Size reduction of GaInAsP/InP microdisk injection lasers for spontaneous emission control”, Quantum Optoelectronic Conf., Lake Tahoe, no. QFD3, 1997.

47. T. Baba, M. Ikeda and N. Kamizawa, “Observation of photonic bandgap in 2D GaInAsP/InP photonic crystals by equivalent transmission measurements”, Quantum Optoelectronic Conf., Lake Tahoe, no. QThA3, 1997.

48. T. Baba, “A consideration on microcavity lasers --- VCSELs, photonic crystals and microdisks ---”, 14th Semiconductor Laser Int. Sympo., Yokohama, no. 6, 1997.

49. A. Sakai, M. Fujita and T. Baba, “Theoretical characterization of microdisk lasers for high resolution near field probe”, 14th Semiconductor Laser Int. Sympo., Yokohama, no. 19, 1997.

50. T. Baba, A. Sakai and M. Fujita, “Optical near field probe using evanescent field of microdisk lasers”, Second Conf. Laser and Electro-Optics Pacific Rim., Makuhari, no. FU4, 1997.

51. M. Fujita, A. Sakai and T. Baba, “Ultra-low threshold 2-mm-diameter GaInAsP microdisk injection laser”, Second Optoelectronic and Commun. Conf., Seoul, no. QC4-5, 1997.

52. T. Maki and T. Baba, “Multi-reflection-type micro-mirror device for control of optical deflection”, 6th Microoptic Conf., Tokyo, no. M5, 1997.

53. A. Sakai, M. Fujita, H. Yamada and T. Baba, “Theoretical high resolution of near field probe based on a modified microdisk laser”, 6th Microoptic Conf., Tokyo, no. Q3, 1997.

54. M. Ikeda and T. Baba, “Theoretical analysis of transmission and resonance characteristics in finite 2-dimensional photonic crystals using scattering matrix method”, Topical Meet. Contemporary Photonic Technologies., Tokyo, no. Pc-03, 1998.

55. N. Kamizawa, A. Mizukoshi, N. Umesawa and T. Baba, “Electron-photon interaction in a GaInAsP air-gap semiconductor microcavity”, Topical Meet. Contemporary Photonic Technologies., Tokyo, no. Pc-04, 1998.

56. M. Ikeda and T. Baba, “Theoretical investigation on lightwave control and electron-radiation coupling effect in photonic crystals”, 5th Int. Workshop Femtosecond Technol., Tsukuba, p. 85, 1998.

57. A. Sakai, M. Fujita, H. Yamada and T. Baba, “FDTD simulation of photonic integrated devices based on microdisk laser”, 15th Semiconductor Laser Int. Sympo., Yokohama, no. 4, 1998.

58. M. Fujita, K. Inoshita and T. Baba, “Room temperature cw operation in a GaInAsP microdisk laser with record low threshold of 150 mA”, 10th Int. Topical Meet. Indium Phosphide and Related Materials, Tsukuba, no. TuP-41, 1998.

59. H. Yamada, A. Sakai, M. Fujita and T. Baba, “Optical near field probe action in a microdisk laser with 0.1l resolution”, Int. Semicon. Laser Conf., Nara, no. TuE18, 1998.

60. M. Fujita and T. Baba, “A novel GaInAsP microcylinder laser with AlInAs(Ox) claddings”, 11th Int. Topical Meet. Indium Phosphide and Related Materials, Davos, no. TuB1-5, 1999.

61. A. Sakai, K. Kambara and T. Baba, “Photonic devices based on circular and fan-shaped disks”, 7th Microoptic Conf., Makuhari, no. MK3, 1999.

62. N. Fukaya, J. Yonekura and T. Baba, “First successful fabrication and evaluation of 2-dimensional photonic crystal waveguides with bends”, 7th Microoptic Conf., Makuhari, no. MK4, 1999.

63. J. Yonekura, M. Ikeda and T. Baba, “Scattering matrix analysis of 2-D photonic crystal lightwave circuits”, 7th Microoptic Conf., Makuhari, no. MF4, 1999.

64. T. Baba, K. Inoshita, H. Tanaka, J. Yonekura, M. Ariga, A. Matsutani, T. Miyamoto, F. Koyama and K. Iga, “Strong enhancement of extracted spontaneous emission from GaInAsP 2-D photonic crystals”, Third Conf. Laser and Electro-Optics Pacific Rim., Seoul, no. ThD1, 1999.

65. M. Fujita, A. Sakai, D. Ohsaki and T. Baba, “Ultimate low threshold and high efficiency calculated for GaInAsP microdisk injection lasers with optimum posts”, Third Conf. Laser and Electro-Optics Pacific Rim., Seoul, no. ThD3, 1999.

66. M. Ariga, Y. Sekido, T. Baba, A. Matsutani, F. Koyama and K. Iga, “Low threshold GaInAsP lasers with semiconductor/air DBR fabricated by inductively coupled plasma etching”, Third Conf. Laser and Electro-Optics Pacific Rim., Seoul, no. FU6, 1999.

67. K. Inoshita, T. Iwai and T. Baba, “Fabrication of injection-type light emitters GaInAsP 2-D photonic crystal by ICP etching”, Int. Workshop on Photonic and Electromagnetic Crystal Structures, Sendai, no. W4-3, 2000.

68. N. Fukaya, D. Ohsaki and T. Baba, “Fabrication of air-hole photonic crystal slab for optical waveguides with steep bends”, Int. Workshop on Photonic and Electromagnetic Crystal Structures, Sendai, no. W4-6, 2000.

69. T. Baba, T. Yonehana and D. Ohsaki, “FDTD simulation of light transmission in 2-D photonic crystals made of optical Kerr media”, 7th Int. Workshop Femtosecond Technol., Tsukuba, no. FB-7, 2000.

70. M. Fujita, R. Ushigome and T. Baba, “40-mA-threshold lasing in GaInAsP microdisk lasers”, Optoelectronic Conf., Makuhari, no. 14C-3-5, 2000.

71. H. Yamada, A. Sakai and T. Baba, “2-D imaging of nanometer object by microdisk near field sensor”, Optoelectronic Conf., Makuhari, no. 14C-1-5, 2000.

72. M. Fujita, R. Ushigome and T. Baba, “Large spontaneous emission factor confirmed in cw lasing microdisk injection laser”, IEEE/LEOS Annual Meeting, Puerto Rico, no. TuDD-3, 2000.

73. H. Ichikawa, K. Inoshita and T. Baba, “Reduced surface recombination and strongly enhanced light extraction in CH4-plasma-irradiated GaInAsP photonic crystals”, IEEE/LEOS Annual Meeting, Puerto Rico, no. WK-3, 2000.

74. A. Sakai, G. Hara and T. Baba, “Sharply bent optical waveguides on silicon-on-insulator substrate”, SPIE Photonic West “Physics and Simulation of Optoelectronic Devices”, San Hose, no. 4283-75, 2001.

75. K. Aoki, H. T. Miyazaki, H. Hirayama, K. Inoshita, T. Baba, N. Shinya and Y. Aoyagi, “Fabrication of 3D photonic crystal from 2D photonic plates by micromanipulation”, Conf. on Laser and Electro-Optics Pacific Rim, no. MA2-2, 2001.

76. T. Baba, D. Ohsaki, T. Iwai and M. Nakamura, “Transmission-type photonic crystal devices with efficient input/output interfaces”, Conf. on Laser and Electro-Optics Pacific Rim, no. TuA3-5, 2001.

77. A. Sakai, G. Hara and T. Baba, “Large effective index and sharp bends in SOI optical waveguides”, Conf. on Laser and Electro-Optics Pacific Rim, no. MA1-2, 2001.

78. M. Fujita and T. Baba, “Stable single whispering gallery mode microgear cavity”, Conf. on Laser and Electro-Optics Pacific Rim, no. MA1-4, 2001.

79. M. Fujita, K. Teshima and T. Baba, “Low threshold cw lasing in photo-pumped GaInAsP microdisk lasers”, Conf. on Laser and Electro-Optics Pacific Rim, no. MA1-5, 2001.

80. H. Ichikawa, K. Inoshita, T. Baba and Y. Aizawa, “SIMS analysis of CH4-plasma-irradiated GaInAsP surface for reduction in surface recombination of micro light emitters, Conf. on Laser and Electro-Optics Pacific Rim, no. P12-61, 2001.

81. H. Ichikawa and T. Baba, “High efficiency light emitting diode with 2-D surface grating photonic crystal”, Integrated Photon. Res. Conf., Vancouver, 2002.

82. R. Ushigome, M. Fujita, A. Sakai and T. Baba, “GaInAsP microdisk injection laser with Benzocyclobutene polymer cladding and its athermal effect”, Integrated Photon. Res. Conf., Vancouver, 2002.

83. A. Sakai, T. Fukazawa and T. Baba, “Micro-branch in silicon photonic wire waveguides”, Integrated Photon. Res. Conf., Vancouver, 2002.

84. A. Sakai, T. Fukazawa and T. Baba, “Polarization conversion at micro-bend in Si photonic wire waveguide”, Integrated Photon. Res. Conf., Vancouver, 2002.

85. T. Baba and T. Iwai, “Enhancement of third order nonlinearity calculated for 2-D photonic crystal”, Integrated Photon. Res. Conf., Vancouver, 2002.

86. M. Fujita and T. Baba, “Microgear laser --- a fusion of whispering gallery mode cavity and photonic crystal”, Integrated Photon. Res. Conf., Vancouver, 2002.

87. M. Fujita, R. Ushigome and T. Baba, “Effective carrier confinement in microdisk lasers by strain relaxation in quantum wells”, Integrated Photon. Res. Conf., Vancouver, 2002.

Awards

1. Niwa Memorial Prize to T. Baba for paper “Monolithic integration of ARROW-type demultiplexer and photodetector in shorter wavelength region”, IEEE/OSA J. Lightwave Technol., vol. LT-8, no. 1, pp. 99-104, 1990, etc., Tokyo, February 28, 1991.

2. Best Paper Award of Microoptics Conf./Topical Meeting of Gradient Index Optical Systems '93 to T. Baba, Y. Yogo, K. Suzuki, F. Koyama and K. Iga, “Room temperature continuous wave lasing characteristics of GaInAsP/InP surface emitting laser”, Kawasaki, October 22, 1993.

3. Academic Encouragement Award to T. Baba for presentation ”Low threshold room temperature pulsed lasing and increase in cw temperature in 1.3mm circular planar buried heterostructure surface emitting lasers”, no. C-154, 1993, Tokyo, March 27, 1994.

4. Paper Award of IEICE to T. Baba, Y. Yogo, K. Suzuki, F. Koyama and K. Iga, “First room temperature cw operation of GaInAsP/InP surface emitting laser”, IEICE Trans. Electron., vol. E76-C, no. 9, pp. 1423-1424, 1993, Tokyo, May 14, 1994.

5. Best Paper Award of Microoptics Conf. ’99 to N. Fukaya, J. Yonekura and T. Baba, “First successful fabrication and evaluation of 2-dimensional photonic crystal waveguides with bends”, Makuhari, July 16, 1999.

6. Marubun Research Encouragement Award to T. Baba for “Pioneering work on photonic integration based on microstructure photonic devices”, Tokyo, March 9, 2000.

7. IEEE Best Student Paper Award of Optoelectronic and Communication Conf. ’00 to M. Fujita, R. Ushigome and T. Baba, “40-mA-threshold lasing in GaInAsP microdisk lasers”, Optoelectronic Conf., Makuhari, July 17, 2000.