Welcome to my homepage

Toshihiro Nakaoka is an associate professor in the Department of Engineering and Applied Sciences at Sophia University, where his group is concerned with studying electronic and optical properties of nanostructures. He is now concurrently working as a JST researcher of a PRESTO program "Materials and processes for innovative next generation devices". Other things you will find here are materials and links related to my research and CV. This page contains some Japanese characters. (If strange sequences of characters are displayed, don't worry about them.)

Interests

  • Single photon and/or electron quantum devices using self-assembled quantum dots
  • Converts between elementary excitations in solids.
  • Quantum state transfer between photon and electron.
  • Physics of electronic and optical properties in quantum dot.
  • Physics and controll of spin or g-factor in quantum dot
  • Nano-cavity effects, photonic crystal and plasmonics
  • Photo-induced phenomena in semiconductors

Curriculum Vitae

TOSHIHIRO NAKAOKA

Dept. Address

7-1 Kioi, Chiyoda-ku, Tokyo 102-8554, Japan.

Personal Details

Name: Toshihiro Nakaoka
Electronic mail:e-mail

Work Experience

Professor 4/2017-
Associate Professor 4/2010-3/2017
JST researcher of PRESTO program 10/2008-10/2012
Project Associate Professor 11/2007-3/2010
Project Lecturer 09/2006-10/2007
Guest Scientist 08/2005-04/2006 Walter Schottky Institute, Technical University of Munchen, Germany.
Research Associate 04/2002-08/2006
Researcher 04/2001-03/2002 Institute of Industrial Science, University of Tokyo

Education

Graduate School of Science, Osaka University Osaka, Japan Ph.D. in Physics, Mar. 2001.

Experimental research in nanostructural dynamics of chalcogenide glasses investigated by Raman scattering and photoluminescence measurements under the direction of Prof. Murase. Thesis: "Investigation of nanostructural dynamics and rigidity percolation in network glasses."

Graduate School of Science, Osaka University Osaka, Japan M.A. in Physics, Mar 1999.
Department of Physics, Osaka University Osaka, Japan B.A. in Physics, Mar 1997.

Research

  • 2007-present

    • Chalcogenide semiconductors for novel devices and physics: solid state electrolyte, electrochemical metallization memories (ECM), super-ionic conduction of silver, fractal growth of metal filaments, photo-induced phenomena, and plasmonics.
    • Devices for quantum information technology: Fabrication and experimental measurement of single photon electron devices using self-assembled dots, nitride nanowires.

  • 2005-2006

    • Time-resolved measurement on quantum mechanically coupled exciton states in a quantum dot molecule (QDM), which is the first observation of PL decay in single QDM. We have also shown tuning of radiative recombination rate as fraction of direct exciton character is varied.

  • 2003-2005

    • Experimental and theoretical investigation of g-factor of self-assembled quantum dots. Knowledge of electron and hole g-factors, which are the coefficient connecting spin moment with magnetic one, is important to design such spin-based devices. For example, the system with a large g-factor is preferable for controlling spin-qubit while near-zero electron g-factor is suitable to design a quantum receiver. We have investigated the g-factor in self-assembled dots by single dot spectroscopy under applied magnetic field and by 8 band kp calculation. We have demonstrated experimentally and theoretically that the g-factor in InGaAs self-assembled dots can be tuned by changing the dot-size and/or by modifying strain.

  • 2003-2004

    • Time resolved photoluminescence measurement and single dot spectroscopy of vertically-stacked self-assembled quantum dots. We have observed a delay of PL due to non-resonant tunneling between the stacked dots.

  • 2002-2004

    • Fabrication and optical measurement of micromachined airbridge in which quantum dots are embedded. We have controlled the PL emission energy of the dots by using the MEMS device. This type of structure enables deformation coupling between nanomechanical mode of airbridge and a QD.

Publications (old)

For recent publications, please see. researchmap.

Journal publications

  1. K. Sekine, Y. Onoue, T. Yoshiike, K. Asami, S. Ishizawa, T. Nakaoka, K. Kishino, Single InGaN nanocolumn spectroscopy, Japanese Journal of Applied Physics 54, 04DJ03 (2015).
  2. Toru Miyabe and Toshihiro Nakaoka, Nanogap Resistance Random Access Memory Based on Natural Aluminum Oxide, Jpn. J. Appl. Phys. 52 (2013) 04CJ08.
  3. Toshihiro Nakaoka, Hiroki Satoh, Saori Honjo, and Hideo Takeuchi, "First-sharp diffraction peaks in amorphous GeTe and Ge2Sb2Te5 films prepared by vacuum-thermal deposition", AIP ADVANCES 2, 042189/1-6 (2012).
  4. T. Nakaoka, K. Watanabe, N. Kumagai, and Y. Arakawa, "A single-electron probe for buried optically active quantum dot", AIP Advances 2, 032103 (2012).
  5. T. Nakaoka, Y. Tamura, T. Saito, T. Miyazawa, K. Watanabe, Y. Ota, S. Iwamoto, and Y. Arakawa, "Wavelength tunable quantum dot single-photon source with a side gate", Japanese Journal of Applied Physics, 51,02BJ05 (2012).
  6. T. Nakaoka, Y. Tamura, T. Saito, T. Miyazawa, K. Watanabe, Y. Ota, S. Iwamoto, and Y. Arakawa, “Competing influence of an in-plane electric field on the Stark shifts in a semiconductor quantum dot”, Applied Physics Letters. 99, 181109/1-3 (2011).
  7. S. M. Huang, A. O. Badrutdinov, L. Serra, T. Kodera, T. Nakaoka, N. Kumagai, Y. Arakawa, D. A. Tayurskii, K. Kono, and K. Ono, “Enhancement of Rashba coupling in vertical In0.05Ga0.95As/GaAs quantum dots”, Phys. Rev. B 84, 085325/1-5 (2011).
  8. T. Miyazawa, K. Takemoto, T. Nakaoka, T. Saito, S. Hirose, Y. Sakuma, N. Yokoyama, Y. Arakawa, "Effect of electronic structure on single-photon emission in InAs/InP quantum dot with quasi-resonant excitation", physica status solidi (c) Volume 8, Issue 2, pages 417-419 (2011).
  9. Toshiyuki Miyazawa, Tetsuo Kodera, Toshihiro Nakaoka, Katsuyuki Watanabe, Naoto Kumagai, Naoki Yokoyama, and Yasuhiko Arakawa, "Two-Photon Control of Biexciton Population in Telecommunication-Band Quantum Dot", Applied Physics Express 3, 064401 (2010).
  10. Toshiyuki Miyazawa, Toshihiro Nakaoka, Tetsuo Kodera, Hiroyuki Takagi, Naoto Kumagai, Katsuyuki Watanabe, Yasuhiko Arakawa, "Acoustic phonon effects on telecommunication-band quantum dot exciton Rabi oscillation", physica status solidi (c) Volume 7, Issue 10, pages 2578-2581 (2010).
  11. Young-Jun Yu, Haneol No, and Wonho Jh, Heung-Ryoul Noh, Toshihiro Nakaoka and Yasuhiko Arakawa “Near-field optical observation of electric-field-induced fluorescence switching in laterally coupled quantum dots” Phys. Rev. B 82, 085308/1-5 (2010).
  12. T Kodera, Keiji Ono, Naoto Kumagai , Toshihiro Nakaoka , Seigo Tarucha and Yasuhiko Arakawa, “Fabrication and characterization of a vertical pillar structure including a self-assembled quantum dot and a quantum well”, Physica E: Low-dimensional Systems and Nanostructures Volume 42, Issue 10, September 2010, Pages 2592-2594.
  13. T. Saito, T. Nakaoka and Y. Arakawa, ” Magnetic field dependence of exciton fine structures in InAs/GaAs quantum dots: Exchange vs. Zeeman splittings”, Physica E: Low-dimensional Systems and Nanostructures 42 (10) 2532-2535.
  14. Toshiyuki Miyazawa, Toshihiro Nakaoka, Kazuya Takemoto, Shinnichi Hirose, Shigekazu Okumura, Motomu Takatsu, Tatsuya Usuki, Naoki Yokoyama, and Yasuhiko Arakawa, ‘Tunneling-Injection Single-Photon Emitter Using Charged Exciton State’, Japanese Journal of Applied Physics 48, 06FF01 (2009).
  15. Toshiyuki Miyazawa, Toshihiro Nakaoka, Katsuyuki Watanabe, Naoto Kumagai, Naoki Yokoyama, and Yasuhiko Arakawa, ‘Anisotropic exciton Rabi oscillation in single telecommunication-band quantum dot’, Japanese Journal of Applied Physics (accepted).
  16. T. Miyazawa, T. Nakaoka, K. Takemoto, S. Hirose, S. Okumura, M. Takatsu, T. Usuki, N. Yokoyama, Y. Arakawa, “Tunneling-Injection Single-Photon Emitter Using Charged Exciton State”, Jpn. J. Appl. Phys. 48, 06FF01 (2009).
  17. T. Kodera, T. Ferrus, T. Nakaoka, G. Podd, M. Tanner, D. Williams, Y. Arakawa, “Fine and Large Coulomb Diamonds in a Silicon Quantum Dot”, J Jpn. J. Appl. Phys. 48, 06FF15 (2009).
  18. T. Kodera, A. Suzuki, T. Miyazawa, H. Takagi, N. Kumagai, K. Watanabe, T. Nakaoka, Y. Arakawa, “Biexcitonic photocurrent induced by two-photon process at a telecommunication band”, physica status solidi (c) 6, 1445 - 1448 (2009).
  19. H. Takagi, T. Nakaoka, K. Watanabe, N. Kumagai, and Y. Arakawa, "Coherently driven semiconductor quantum dot at a telecommunication wavelength", Optics Express 16, 13949 (2008).
  20. T. Miyazawa, T. Nakaoka, T. Usuki, J. Tatebayashi, Y. Arakawa, S. Hirose, K. Takemoto, M. Takatsu, and N. Yokoyama, "Electric field modulation of exciton recombination in InAs/GaAs quantum dots emitting at 1.3 μm", J. Appl. Phys. 104, 013504 (2008).
  21. T. Miyazawa, T. Nakaoka, T. Usuki, Y. Arakawa, K. Takemoto, S. Hirose, S. Okumura, M. Takatsu, N. Yokoyama, "Exciton dynamics in current-injected single quantum dot at 1.55 μm", Appl. Phys. Lett. 92, 161104 (2008).
  22. H. Takagi, T. Nakaoka, K. Watanabe, N. Kumagai, S. Iwamoto, and Y. Arakawa , "Observation of very narrow fine-structure splittings in self-assembled quantum dots by photocurrent spectroscopy", Physica E, 40, 2192 (2008).
  23. T. Nakaoka, S. Tarucha and Y. Arakawa , "Electrical tuning of g-factor in single self-assembled quantum dots", Phys. Rev. B 76, 041301(R) (2007).
  24. T. Nakaoka, S. Kako, S. Tarucha and Y. Arakawa , "Coulomb blockade in a self-assembled GaN quantum dot", Appl. Phys. Lett. 90, 162109 (2007).
  25. T. Nakaoka, H. J. Krenner, E. C. Clark, M. Sabathil, M. Bichler, Y. Arakawa, G. Abstreiter, and J. J. Finley, "Direct observation of acoustic phonon mediated relaxation between coupled exciton states in a single quantum dot molecule", Phys. Rev. B 74, 121305(R) (2006).
  26. H. J. Krenner, E. C. Clark, T. Nakaoka, M. Bichler, C. Scheurer, G. Abstreiter, and J. J. Finley, "Optically Probing Spin and Charge Interactions in a Tunable Artificial Molecule", Phys. Rev. Lett. 97, 076403 (2006).
  27. T. Nakaoka, S. Kako, and Y. Arakawa, "Unconventional Quantum Confined Stark Effect in GaN/AlN quantum dots.", Phys. Rev. B 73, 121305(R) (2006).
  28. T. Nakaoka, S. Kako, and Y. Arakawa, "Quantum confined Stark effect in single self-assembled GaN/AlN quantum dots", Physica E, 32, 148-151 (2006).
  29. M. Nomura, S. Iwamoto, T. Nakaoka, S. Ishida, and Y. Arakawa, "Localized excitation of InGaAs quantum dots by utilizing a photonic crystal nanocavity", APPLIED PHYSICS LETTERS 88, 141108 (2006).
  30. Masahiro Nomura, Satoshi Iwamoto, Toshihiro Nakaoka, Satomi Ishida and Yasuhiko Arakawa, "Cavity Resonant Excitation of InGaAs Quantum Dots in Photonic Crystal Nanocavities ", Japanese Journal of Applied Physics Vol. 45, No. 8A, 2006, pp. 6091-6095.
  31. Toshiyuki Miyazawa, Jun Tatebayashi, Shinichi Hirose, Toshihiro Nakaoka, Satomi Ishida, Satoshi Iwamoto, Kazuya Takemoto, Tatsuya Usuki, Naoki Yokoyama, Motomu Takatsu and Yasuhiko Arakawa, "Development of Electrically Driven Single-Quantum-Dot Device at Optical Fiber Bands ", Japanese Journal of Applied Physics Vol. 45, No. 4B, 2006, pp. 3621-3624.
  32. T. Sato, T. Nakaoka, M. Kudo, and Y. Arakawa, "Magneto-optical single dot spectroscopy of GaSb/GaAs type II quantum dots", Physica E 32, 152-154 (2006).
  33. D. Englund, D. Fattal, E. Waks, G. Solomon, B. Zhang, T. Nakaoka, Y. Arakawa, Y. Yamamoto, and J. Vuckovic, "Controlling the Spontaneous Emission Rate of Single Quantum Dots in a 2D Photonic Crystal", Phys. Rev. Lett. 95, 013904 (2005).
  34. T. Nakaoka, T. Saito, J. Tatebayashi, S. Hirose, T. Usuki, N. Yokoyama, and Y. Arakawa, "Tuning of g-factor in self-assembled In(Ga)As quantum dots through strain engineering", Phys. Rev. B 71(20), 205301/1-205301/7 (2005).
  35. M. Jung , T. Machida, K. Hirakawa, S. Komiyama, T. Nakaoka, S. Ishida, Y. Arakawa, "Shell structures in self-assembled InAs quantum dots probed by lateral electron tunneling structures", Appl. Phys. Lett. 87 (20), 203109 (2005).
  36. S. Iwamoto, J. Tatebayashi, T. Fukuda, T. Nakaoka, S. Ishida, Y. Arakawa, "Observation of 1.55 mu m light emission from InAs quantum dots in photonic crystal microcavity", Jpn. J. Appl. Phys., 44 (4B): 2579-2583 (2005).
  37. M. Kudo, T. Nakaoka, S. Iwamoto, Y. Arakawa, "InAsSb quantum dots grown on GaAs substrates by molecular beam epitaxy", Jpn. J. Appl. Phys., 44 (1-7): L45-L47 (2005).
  38. T. Ide, T. Baba, J. Tatebayashi, S. Iwamoto, T. Nakaoka, Y. Arakawa, "Room temperature continuous wave lasing in InAs quantum-dot microdisks with air cladding", Optics Express 13 (5): 1615-1620 (2005).
  39. T. Saito, T. Nakaoka, T. Kakitsuka, Y. Yoshikuni, Y. Arakawa, "Strain distribution and electronic states in stacked InAs/GaAs quantum dots with dot spacing 0-6nm", Physica E: Low-Dimensional Systems & Nanostructures (Amsterdam, Netherlands) (2005), 26(1-4), 217-221.
  40. T. Nakaoka, T.Saito, J.Tatebayashi, and Y. Arakawa, "Size, shape, and strain dependence of g-factor in self-assembled In(Ga)As quantum dots", Phys. Rev. B 70(23), 235337/1-235337/8 (2004).
  41. T. Nakaoka, J. Tatebayashi, T.Saito and Y. Arakawa, "Carrier relaxation in closely stacked InAs quantum dots" J. Appl. Phys. 95, 150-154 (2004).
  42. T. Nakaoka, T. Kakitsuka, T. Saito, and Y. Arakawa, "Manipulation of electronic states in single quantum dots by micromachined air-bridge." Appl. Phys. Lett. 84(8), 1392-1394. (2004).
  43. T. Nakaoka, T. Kakitsuka, T. Saito, and Y. Arakawa, "Transition Energy Control via Strain in Single Quantum Dots "Jpn. J. Appl. Phys. 43, pp.2069-2072, (2004).
  44. T. Nakaoka, T. Tatebayashi, and Y. Arakawa, "Spectroscopy on single columns of vertically aligned InAs quantum dots" Physica E 21(2-4), 409-413, (2004).
  45. S.K. Park, J. Tatebayashi, T. Nakaoka, T. Sato, Y.J. Park, and Y. Arakawa, "Enhanced Optical Porperties of High-Density (>1011/cm2) InAs/AlAs Quantum Dots by Hydrogen Passivation" Jpn. J. Appl. Phys. vol. 43, no. 4B, 2118-2121(2004)
  46. Y. Toda, R. Morita, T. Nakaoka, M. Yamashita, T. Inoue, and Y. Arakawa "Selective excitation of self-assembled quantum dots by using shaped pulse", Physica E 21, 180 (2004)
  47. M. Kudo, T. Mishima, S. Iwamoto, T. Nakaoka, Y. Arakawa, " Long-wavelength luminescence from GaSb quantum dots grown on GaAs substrates", Physica E 21(2-4),275-278　(2004).
  48. T. Ide, T. Baba, J. Tatebayashi, S. Iwamoto, T. Nakaoka, Y. Arakawa, " Lasing characteristics of InAs quantum-dot microdisk from 3 K to room temperature", Appl. Phys. Lett. (2004), 85(8), 1326-1328.
  49. T. Nakaoka, T. Kakitsuka, T. Saito, S. Kako, S. Ishida, M. Nishioka, Y. Yoshikuni, and Y. Arakawa: "Strain-induced modifications of the electronic states of InGaAs quantum dots" J. Appl. Phys. 94, 6812 (2003).
  50. T. Nakaoka, T. Kakitsuka, T. Saito, S. Kako, S. Ishida, M. Nishioka, Y. Yoshikuni, and Y. Arakawa: "Effect of strain variation on photoluminescence from InGaAs quantum dots in air-bridge structures." Phys. Stat. Solidi (2003), 238(2), 289-292.
  51. T. Kakitsuka, T. Saito, T. Nakaoka, Y. Arakawa, H. Ebe, M. Sugawara, and Y. Yoshikuni, "Numerical analysis of transition energy shift in InAs/GaAs quantum dots induced by strain-reducing layers", Phys. Stat. Sol. (c) 0, No. 4, pp. 1157-1160 (2003).
  52. Y. Wang, T. Nakaoka, K. Murase, “Structural relaxation and self-organization in network glasses at stiffness transition", J. of Non-Cryst. Solids 307-310, 772 (2002).
  53. T. Nakaoka, S. Kako, S. Ishida, M. Nishioka, Y. Arakawa, "Optical anisotropy of self-assembled InGaAs quantum dots embedded in wall-shaped and air-bridge structures." Applied Physics Letters (2002), 81(21), 3954-3956.
  54. T. Nakaoka, Y. Wang, K. Inoue, and K.Murase, "Trifurcated crystallization and inhomogeneity in GeSe2 glass", Phys. Rev. B 63, 224206/1-5 (2001),.
  55. T. Nakaoka, Y. Wang, O. Matsuda, K. Inoue, and K. Murase, "Resonant Raman scattering in crystalline GeSe2" Phys. Rev. B 61, 15569-15572 (2000).
  56. T. Nakaoka, Y. Wang, O. Matsuda, K.I noue, and K. Murase "Relaxation process of band edge exciton in layered crystalline GeSe2" J. Luminescence, 87-89, 617-619 (2000).
  57. Y. Wang, T. Komamine, T. Nakaoka, O. Matsuda, K. Inoue, and K. Murase, " Effect of thermal annealing on dynamics of photoluminescence in a-GeSe2 films", J. Non-Cryst. Solids, 266-269, 904-907 (2000).

Conference publications

  1. K. Sekine, Y. Onoue, T. Yoshiike, K. Asami, S. Ishizawa, T. Nakaoka, and K. Kishino, "Single InGaN nanocolumn spectroscopy", 46th Solid State Devices and Materials (SSDM 2014), PS-9, Tsukuba, Japan.
  2. T. Miyabe and T. Nakaoka, "Nanogap ReRAM Based on Natural Aluminum Oxide", 44th International Conference on Solid State Devices and Materials (SSDM 2012), September 25-27 2012, PS-9-7, Kyoto, Japan(2012).
  3. T. Nakaoka, Y. Tamura, T. Miyazawa, K. Watanabe, Y. Ota, S. Iwamoto, and Y. Arakawa, "Wavelength tunable single-photon source with a side gate", 2011 International Conference on Solid State Devices and Materials (SSDM 2011), J-6-4, Nagoya (2011).
  4. Toshiyuki Miyazawa, Toshihiro Nakaoka, Tetsuo Kodera, Hiroyuki Takagi, Naoto Kumagai, Katsuyuki Watanabe, and Yasuhiko Arakawa, ‘Acoustic Phonon Effects on Telecommunication Band Exciton Rabi Oscillation’, 36 th International Symposium on Compound Semiconductors (ISCS 2009), 19.4, University of California Santa Barbara, USA, (2009).
  5. Toshiyuki Miyazawa, Toshihiro Nakaoka, Katsuyuki Watanabe, Naoto Kumagai, and Yasuhiko Arakawa, ‘Anisotropic Exciton Rabi Oscillations in Telecommunication Band Quantum Dot’, 22 nd International Microprocesses and Nanotechnology Conference (MNC 2009), 18D-7-88, Sheraton Sapporo Hotel, Sapporo, Japan, (2009).
  6. Toshiyuki Miyazawa, Toshihiro Nakaoka, Tetsuo Kodera, Katsuyuki Watanabe, and Yasuhiko Arakawa, ‘Temperature Dependence of Excitonic Rabi Oscillation in Single Telecommunication-Band Quantum Dot’, International Symposium on Quantum Nanophotonics and Nanoelectronics (ISQNN 2009), ThP-15, Univ. of Tokyo, Tokyo, Japan, (2009).
  7. T. Nakaoka, K. Watanabe, N. Kumagai, Y. Arakawa, “Lateral single electron transport in capped self-assembled quantum dots”, The 14th International Conference on Modulated Semiconductor Structures (MSS14), M3e, Kobe, July 21 (2009).
  8. A. Kirihara , J. Fujikata , T. Nakaoka , N. Kumagai , K. Watanabe , M. Shirane , S. Ohkouchi , S. Yorozu, Y. Arakawa, “High-transmission ridge nanoapertures for quantum dot devices”, MAR09 Meeting of the American Physical Society , March 17, 2009, J10.00006 (2009).
  9. T. Miyazawa, T. Nakaoka, S. Okumura, S. Hirose, K. Takemoto, M. Takatsu, T. Usuki, N. Yokoyama and Y. Arakawa, “Sub-GHz Operation of Single-Photon Emitting Diode at 1.55 μm”, SPIE Photonic West'09, SanJose, USA (2009) (Invited Paper), Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIII, - Proceedings of SPIE Volume 7214, Paper 7214-29.
  10. T. Miyazawa, T. Nakaoka, S. Okumura, S. Hirose, K. Takemoto, M. Takatsu, T. Usuki, N. Yokoyama and Y. Arakawa, "Tunneling-Injection Single-Photon Emitter using Charged Exciton State", 21st International Microprocesses and Nanotechnology Conference (MNC 2008), Fukuoka (2008),30B-10-3.
  11. A. Suzuki,T. Kodera, T. Miyazawa, H. Takagi, N. Kumagai, K. Watanabe, T. Nakaoka, Y. Arakawa, "Dynamics of excitons in an InAs quantum dot at a telecom-band", Nano-Optoelectronics Workshop, 2008. i-NOW 2008, Date: 2-15 Aug. 2008, 10.1109/INOW.2008.4634522, Page(s): 231-232 (2008).
  12. T. Kodera, A. Suzuki, T. Miyazawa, H. Takagi, N. Kumagai, K. Watanabe, T. Nakaoka and Y. Arakawa, “‘Biexiciton Rabi oscillation in a single quantum dot at a telecommunication band”,35 th International Symposium on Compound Semiconductors (ISCS 2008), Rust, Germany, (2008),Mo 2.3.
  13. T. Miyazawa, T. Kodera, A. Suzuki, H. Takagi, N. Kumagai, K. Watanabe, T. Nakaoka, and Y. Arakawa, “Rabi oscillation and dynamics of excitonic states in a single quantum dot at a telecommunicationband", Nanotechnology Materials and Device Conference 2008 (NMDC 2008), Tokyo, Japan (2008), TuAI-4.
  14. T. Nakaoka, H. Takagi, T. Kodera, N. Kumagai, K. Watanabe, and Y. Arakawa, “Observation of exciton Rabi oscillations at a telecommunication wavelength by photocurrent spectroscopy”, Tu3-O-02, the 5th International Conference on Semiconductor Quantum Dots (QD2008), Gyeongju, Korea (2008).
  15. T. Nakaoka, K. Watanabe, N. Kumagai and Y. Arakawa, “Gate-Controlled Electron Tunneling, Photocurrent and Photoemission in Self-assembled Quantum Dots”, 8th International Conference on Physics of Light-Matter Coupling in Nanostructures (PLMCN8), TuC-2, Tokyo (2008).
  16. T. Miyazawa, T. Nakaoka, K. Takemoto, M. Takatsu, T. Usuki, N. Yokoyama and Y. Arakawa, “Optical Properties and Electronic Structure of Telecommunication Bands InAs Quantum Dots on InP Substrate”, 8th International Conference on Physics of Light-Matter Coupling in Nanostructures (PLMCN8), ThA-6, Tokyo (2008).
  17. A. Kirihara, S. Kono, T. Nakaoka, N. Kumagai, K. Watanabe, J. Fujikata, S. Ohkouchi, S. Yorozu and Y. Arakawa, “Magneto-optical Spectroscopy of Neutral, Positively-charged, and Negatively-charged Excitons in Single InAs/GaAs Quantum Dots”, 8th International Conference on Physics of Light-Matter Coupling in Nanostructures (PLMCN8), TuB-5, Tokyo (2008).
  18. T. Kodera, H. Takagi, T. Nakaoka, N. Kumagai, K. Watanabe, S. Tarucha and Y. Arakawa, ” Temperature and Magnetic Field Dependence of Photocurrent Peaks at Wavelength of 1.3 μm”, 8th International Conference on Physics of Light-Matter Coupling in Nanostructures (PLMCN8), TuB-6, Tokyo (2008).
  19. T. Nakaoka, S. Tarucha, Y. Arakawa, "Electrical tuning of g-factor in single self-assembled quantum dot", B12, Frontiers in Nanoscale Science and Technology, Tokyo (2007).
  20. H. Takagi, T. Nakaoka, K. Watanabe, N. Kumagai, S. Iwamoto, and Y. Arakawa, "Spin Fine Structures of a Single Quantum Dot Studied by Photocurrent Spectroscopy", B7, Frontiers in Nanoscale Science and Technology, Tokyo (2007).
  21. T. Nakaoka, H.J. Krenner, E. C. Clark, M. Sabathil, M. Bichler, Y. Arakawa, G. Abstreiter, and J. J. Finley, “Direct Observation of Inter-level Phonon Relaxation in Individual Quantum Dot Molecule”, HL52.7, DPG spring meeting, Dresden, Germany (2006).
  22. E. C. Clark, H.J. Krenner, T. Nakaoka, M. Sabathil, M. Bichler, Y. Arakawa, G. Abstreiter, and J. J. Finley, “Observation of Multi-exciton Transitions in Individual Quantum Dot Molecules”, HL50.92, DPG spring meeting, Dresden, Germany (2006).
  23. E. C. Clark, H.J. Krenner, T. Nakaoka, M. Sabathil, M. Bichler, Y. Arakawa, G. Abstreiter, and J. J. Finley, "Charges and spins in nanostructures: basics and devices", 14th International Winter School on New Developments in Solid State Physics, Mauterndorf, Province of Salzburg, Austria. (2006).
  24. E. C. Clark, H.J. Krenner, T. Nakaoka, M. Sabathil, M. Bichler, Y. Arakawa, G. Abstreiter, and J. J. Finley, “Controlled Tunnel Hybridization Of Excitons In Individual Quantum Dot Molecules And Interlevel Phonon Relaxation”, The GDEST EU-US Workshop on Quantum Information and Coherence, Munich, Germany (2005).
  25. T. Nakaoka, S. Kako, and Y. Arakawa, “Quantum confined Stark effect in single self-assembled GaN/AlN quantum dots”, The 12th International Conference on Modulated Semiconductor Structures (MSS12), Albuquerque, New Mexico, USA (2005).
  26. S. Iwamoto, J. Tatebayashi, T. Fukuda, T. Nakaoka, S. Ishida and Y. Arakawa “1.55-micron light emission from self-assembled InAs QD in a high-Q photonic crystal microcavity”, Photonic West 2005, San Jose, USA, Proceedings of SPIE-The International Society for Optical Engineering 5733, 406 (2005).
  27. T. Ide, T. Baba, J. Tatebayashi, T. Iwamoto, T. Nakaoka and Y. Arakawa, “Fabrication of InAs quantum-dot microdisk injection laser”, Int. Sympo. Quantum-Dot and Photonic Crystals, Tokyo, no. P-45 (2005).
  28. T. Baba, T. Ide, S. Ishii, J. Tatebayashi, T. Iwamoto, T. Nakaoka and Y. Arakawa, “Quantum-dot lasing and photonic molecule behavior in microdisk lasers”, IEEE/LEOS Annual Meet., Sydney, no. ThZ1 (2005) (Invited Paper).
  29. T. Baba, T. Ide, S. Ishii, A. Nakagawa, J. Tatebayashi, S. Iwamoto, T. Nakaoka, and Y. Arakawa, “Microdisk lasers: quantum dot lasing and bistability”, SPIE Photonic West "Novel In-Plane Semiconductor Lasers IV", San Jose, Proceedings of SPIE-The International Society for Optical Engineering 5738, 295 (2005) (Invited Paper).
  30. T. Ide, T. Baba, J. Tatebayashi, T. Iwamoto, T. Nakaoka and Y. Arakawa, “InAs quantum dot microdisk laser at room temperature”, Conf. Laser and Electro-Optics, Trends in Optics and Photonics no. CThB3, San Francisco (2004)..
  31. M. Kudo, T. Nakaoka, S. Iwamoto, Y. Arakawa, “Self-assembled InAsSb quantum dots grown on GaAs substrates by molecular-beam epitaxy”, International Conference on Indium Phosphide and Related Materials, Conference Proceedings, 16th, Kagoshima, Japan, p.687 (2004).
  32. S. Iwamoto, J. Tatebayashi T. Fukuda, T. Nakaoka, S. Ishida and Y. Arakawa “Observation of light emission at 1.5 ?m unifrom InAs quantum dots in photonic crystal microcavity", International Conference on Solid State Devices and Materials (2004) [備考：The SSDM Paper Award].
  33. T. Saito, T. Nakaoka, T. Kakitsuka, Y. Yoshikuni and Y. Arakawa "Strain Distribution and Electronic States in Stacked InAs/GaAs Quantum Dots with Dot Spacing 0-6 nm", Quantum Dots 2004 Conference, THP5, Banf, Canada (2004).
  34. T. Nakaoka T. Saito, H. Z. Song, T. Usuki and Y. Arakawa “Characterization of g-factors in various In(Ga)As quantum dots” 27th International Conference on the Physics of Semiconductors,Q5.009、USA, AIP Conference Proceedings 772, 741 (2004).
  35. T. Nakaoka .T. Kakitsuka. T. Saito and Y. Arakawa "Demonstration of MEMS Controlled Electronic States in Single Quantum dots", 2003 International Conference on Solid State Devices and Materials (SSDM), Tokyo, Japan (2003).
  36. T. Saito, T. Nakaoka, T. Kakitsuka, Y. Yoshikuni, and Y. Arakawa, "Strain Distribution and Electronic States in Stacked InAs/GaAs Quantum Dots", International Symposium on Quantum Dots and Photonic Crystals (QDPC2003), P-20, University of Tokyo, Tokyo, Japan (2003).
  37. S. K. Park, J. Tatebayashi, T. Nakaoka, T. Sato, Y.J. Park, and Y. Arakawa, "Enhanced Optical Properties of High Density (>1011/cm2) InAs/AlAs Quantum Dots by Using Hydrogen Passivation", 2003 International Conference on Solid State Devices and Materials (SSDM), 604, Tokyo, Japan, (2003).
  38. T. Nakaoka, T. Kakitsuka T. Saito and Y. Arakawa, "MEMS manipulation of electronic states in single quantum dots", Frontiers of NanoscaleScience and Technology", University of Tokyo (2003).
  39. T. Nakaoka, J. Tatebayashi and Y. Arakawa "Spectroscopy on single columns of vertically aligned InAs quantum dots", The 11th International Conference on Modulated Semiconductor Structures, Nara Japan (2002).
  40. T. Nakaoka S. Kako, S. Ishida Y. Arakawa “Manipulation of strain effect on optical anisotropy in self-assembled InGaAs quantum dots” 26th International Conference on the Physics of Semiconductors (2002).
  41. T. Nakaoka, T. Kakitsuka T. Saito S. Kako S. Ishida M. Nishioka Y. Yoshikuni and Y. Arakawa “Effect of strain variation on photoluminescence from InGaAs quantum dots in air-bridge structures”, 2nd International Conference on Semiconductor Quantum Dots-QD2002 (2002).
  42. T. Nakaoka, and Y. Arakawa, “Optical Properties of Quantum Dots Embedded in Micromachined Air Bridge Structures”, Japan-UK10+10 Meeting (2002).
  43. T. Kakitsuka, T. Saito, T. Nakaoka, T. Arakawa, H. Ebe, M. Sugawara and Y. Yoshikuni, “Numerical analysis of transition energy shift in InAs/GaAs quantum dots induced by strain-reducing layers”, 2nd Int. Conf. On Semiconductor Quantum Dots (Tokyo, Japan2002).
  44. Y. Toda, T. Matsubara, S. Kako, T. Nakaoka, M. Nishioka, S. Ishida, and Y. Arakawa, “A study of carrier-phonon interactions in single InGaAs self-assembled quantum dots”, Workshop on Quantum Nonplanar Nanostructures & Nanoelectronics, Tsukuba, Japan (2002).
  45. T. Nakaoka, Y. Wang, O. Matsuda K. Inoue K. Murase, "Correlation of structural relaxation at glass transition with network connectivity in GexSe1-x glasses", 25th International Conference on the Physics of Semiconductors, Osaka, Springer Proceedings in Physics 87, 1687 (2001).
  46. Y. Wang, T. Nakaoka, M. Nakamura, O. Matsuda, K. Murase, “Stiffness transition and connectivity in amorphous chalcogenide semiconductors”, 25th International Conference on the Physics of Semiconductors, Osaka, Springer Proceedings in Physics, 87, 228 (2001).
  47. T. Nakaoka, Y. Wang, O. Matsuda, K. Inoue, and K. Murase, "Reversible photoinduced structural changes in GeSe2 glass at low temperature", 25th International Conference on the Physics of Semiconductors, Osaka, Springer Proceedings in Physics, 87, 113 (2001).

    Domestic Conference publications

    Patents

    1. Y. Arakawa, T. Kakitsuka, Y. Yoshikuni, T. Saito, T. Nakaoka, K. Ebe, M. Sugawara, "Semiconductor optical device", Jpn. Kokai Tokkyo Koho (2004), JP Patent No. 2004119768.
    2. Y. Arakawa, T. Nakaoka, T. Kakitsuka, T. Saito, "Semiconductor optical device", Jpn. Kokai Tokkyo Koho (2005), JP Patent No. 200599586.

    Books

    1. 「ナノフォトニックデバイスの基礎とその展開」（フォトニクスシリーズ）,第４章, コロナ社（印刷中）.
    2. Y. Wang , T. Nakaoka K. Murase "Thermal relaxation and criticality of the stiffness transition", in Phase Transitions and Self-Organization in Electronic and Molecular Materials, edited by J. C. Phillips and M. F. Thorpe, Kluwercademic/ Plenum Publishers) (2001).