Physics and applications of terahertz dynamics of quantum nanostructures

• Project/Area Number: 18201027
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Microdevices/Nanodevices
• Research Institution: The University of Tokyo
• Principal Investigator: HIRAKAWA Kazuhiko The University of Tokyo, 生産技術研究所, 教授 (10183097)
• Co-Investigator(Kenkyū-buntansha): 荒川 泰彦 東京大学, 先端科学技術研究センター, 教授 (30134638) ; 藤田 博之 東京大学, 生産技術研究所, 教授 (90134642) ; 柴田 憲治 東京大学, 生産技術研究所, 助教 (00436578)
• Co-Investigator(Renkei-kenkyūsha): ARAKAWA Yasuhiko 東京大学, 先端科学技術センター, 教授 (30134638) ; FUJITA Hiroyuki 東京大学, 生産技術研究所, 教授 (90134642) ; SHIBATA Kenji 東京大学, 生産技術研究所, 助教 (00436578)
• Project Period (FY): 2006 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥51,870,000 (Direct Cost: ¥39,900,000、Indirect Cost: ¥11,970,000); Fiscal Year 2008: ¥15,210,000 (Direct Cost: ¥11,700,000、Indirect Cost: ¥3,510,000); Fiscal Year 2007: ¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000); Fiscal Year 2006: ¥19,500,000 (Direct Cost: ¥15,000,000、Indirect Cost: ¥4,500,000)
• Keywords: ナノ制御 / テラヘルツ電磁波 / 量子ナノ構造 / 分子素子 / 半導体超格子 / ブロッホ振動 / 量子ドット / ナノ構造

Research Abstract

本研究では、電子とテラヘルツ電磁波との相互作用の詳細な検討から、バルク半導体や半導体超格子構造中の電子の特異な伝導ダイナミクスとそれがもたらす利得スペクトルを明らかにした。さらに利得を応用したテラヘルツ発振器の実現に向けたテラヘルツ共振器構造の試作と評価を行った。また、光の回折限界を大きく超えて、テラヘルツ電磁波で単一の量子ドットや分子の伝導ダイナミクスを測定するためのナノギャップ電極試料構造を作製し、ナノ領域特有の新規な伝導特性を見いだした。

Research Products

• [Journal Article] Non-thermal origin of electromigration at gold nanojunctions in the ballistic regime (2009)
  • Author(s): A. Umeno and K. Hirakawa
  • Journal Title: Applied Physics Letters vol.94
• [Journal Article] Non-equilibrium Green's function calculation for four-level scheme terahertz quantum cascade lasers (2009)
  • Author(s): H. Yasuda, T. Kubis, P. Vogl, N. Sekine, I. Hosako, and K. Hirakawa
  • Journal Title: Applied Physical Letters vol.94
• [Journal Article] The Kondo effect observed up to TK ~ 80 K in self-assembled InAs quantum dots laterally coupled to nanogap electrodes (2009)
  • Author(s): K. Shibata and K. Hirakawa
  • Journal Title: Journal of Crystal Growth vol.311, Issue. 7 Pages: 1795-1798
• [Journal Article] Effect of In-Ga intermixing on the electronic states in self-assembled InAs quantum dots probed by nanogap electrodes (2009)
  • Author(s): K. Shibata, M. Jung, K. M. Cha, M. Sotome, and K. Hirakawa
  • Journal Title: Applied Physics Letters vol 94
• [Journal Article] Non-thermal origin of electromigration at gold nanojunctions in the ballistic regime (2009)
  • Author(s): A. Umeno and K. Hirakawa
  • Journal Title: Applied Physics Letters vol. 94
  • Peer Reviewed
• [Journal Article] Non-equilibrium Green's function calculation for four-level scheme terahertz quantum cascade lasers (2009)
  • Author(s): H. Yasuda, T. Kubis, P. Vogl, N. Sekine, I. Hosako, and K. Hirakawa
  • Journal Title: Applied Physics Letters vol. 94
  • Peer Reviewed
• [Journal Article] The Kondo effect observed up to TK〜80K in self-assembled InAs quantum dots laterally coupled to nanogap electrodes (2009)
  • Author(s): K. Shibata, K. Hirakawa
  • Journal Title: Journal of Crystal Growth vol. 311, Issue. 7, Pages: 1795-1798
  • Peer Reviewed
• [Journal Article] Effect of In-Ga intermixing on the electronic states in self-assembled InAs quantum dots probed by nanogap electrodes (2009)
  • Author(s): K. Shibata, M. Jung, K. M. Cha, M. Stome, and K. Hirakawa
  • Journal Title: Applied Physics Letters vol. 94
  • Peer Reviewed
• [Journal Article] Power dissipation spectra and terahertz intervalley transfer gain in bulk GaAs under high electric fields (2008)
  • Author(s): Y. M. Zhu, T. Unuma, K. Shibata, K. Hirakawa, Y. Ino, and M. Kuwata-Gonokami
  • Journal Title: Applied Physics Letters vol.93
• [Journal Article] Femtosecond acceleration of electrons under high electric fields in bulk GaAs investigated by time-domain terahertz spectroscopy (2008)
  • Author(s): Y. M. Zhu, T. Unuma, K. Shibata, and K. Hirakawa
  • Journal Title: Applied Physics Letters vol.93
• [Journal Article] High Kondo temperature (TK ~ 80 K) in self-assembled InAs quantum dots laterally coupled to nanogap electrodes (2008)
  • Author(s): K. Shibata and K. Hirakawa
  • Journal Title: Applied Physics Letters vol.93
• [Journal Article] Femtosecond very high-field transport in bulk GaAs investigated by time-domain terahertz spectroscopy (2008)
  • Author(s): Y. M. Zhu, T. Unuma, K. Shibata, K. Hirakawa, Y. Ino and M. Kuwata-Gonokami
  • Journal Title: Physica Status Solidi c vol.5, No.1 Pages: 240-243
• [Journal Article] Power dissipation spectra and terahertz intervalley transfer gain in bulk GaAs under high electric fields (2008)
  • Author(s): Y. M. Zhu, T. Unuma, K. Shibata, K. Hirakawa, Y. Ino and M. Kuwata-Gonokami
  • Journal Title: Applied Physics Letters vol. 93
  • Peer Reviewed
• [Journal Article] Femtosecond acceleration of electrons under high electrric fields in bulk GaAs investigated by time-domain terahertz spectroscopy (2008)
  • Author(s): Y. M. Zhu, T. Unuma, K. Shibata, and K. Hirakawa
  • Journal Title: Applied Physics Letters vol. 93
  • Peer Reviewed
• [Journal Article] High kondo temperature (TK〜80K)in self-assembled InAs quantum dots laterally coupled to nanogap electrodes (2008)
  • Author(s): K. Shibata, K. Hirakawa
  • Journal Title: Applied Physics Letters vol. 93
  • Peer Reviewed
• [Journal Article] Femtosecond very high-field transport in bulk GaAs investigated by time-domain terahertz spectroscopy (2008)
  • Author(s): Y. M. Zhu, T. Unuma, K. Shibata, K. Hirakawa, Y. Ino, M. Kuwata-Gonokami
  • Journal Title: Physica Status Solidi (C) 5, No.1 Pages: 240-243
  • Peer Reviewed
• [Journal Article] Electron transport through single self-assembled InAs quantum dots coupled to superconducting nanogap electrodes (2008)
  • Author(s): K. Shibata, C. Buizert, A. Oiwa, K. Hirakawa, S. Tarucha
  • Journal Title: Physica Status Solidi (C) 5, No.1 Pages: 178-181
  • Peer Reviewed
• [Journal Article] Oscillatory changes in the tunneling magnetoresistance effect in semiconductor quantum-dot spin valves (2008)
  • Author(s): K. Hamaya, M. Kitabatake, K. Shibata, M. Jung, M. Kawamura, S. Ishida, T. Taniyama, K. Hirakawa, Y. Arakawa, T. Machida
  • Journal Title: Physical Review B vol. 77 Pages: 81302-1
  • Peer Reviewed
• [Journal Article] Terahertz radiation from ultrahigh-speed field-effect transistors induced by ultrafast optical gate switching (2007)
  • Author(s): T. Kondo and K. Hirakawa
  • Journal Title: Applied Physics Letters vol.91
• [Journal Article] Dispersive terahertz Bloch gain in semiconductor superlattices (2007)
  • Author(s): K. Hirakawa, T. Unuma, and N. Sekine
  • Journal Title: AIP Conf. Procvol.922 vol.922 Pages: 191-191
• [Journal Article] Lateral electron tunneling through single self-assembled InAs quantum dots coupled to superconducting nanogap electrodes (2007)
  • Author(s): K. Shibata, C. Buizert, A. Oiwa, K. Hirakawa, and S. Tarucha
  • Journal Title: Applied Physics Letters vol.91, No. 11
• [Journal Article] Electronic properties of self-assembled InAs quantum dots on GaAs surfaces probed by lateral electron tunneling structures (2007)
  • Author(s): K. Shibata, M. Jung, K. Hirakawa, T. Machida, and H. Sakaki, S. Ishida and Y. Arakawa
  • Journal Title: Journal of Crystal Growth vol.301 Pages: 731-734
• [Journal Article] Kondo effect in a semiconductor quantum dot coupled to ferromagnetic electrodes (2007)
  • Author(s): K. Hamaya, M. Kitabatake, K. Shibata, M. Jung, M. Kawamura, K. Hirakawa, T. Machida, T. Taniyama, S. Ishida, Y. Arakawa
  • Journal Title: Applied Physics Letters vol. 91 Pages: 232105-232105
  • Peer Reviewed
• [Journal Article] Visualization of quantum Hall edge channels through imaging of terahertz emission (2007)
  • Author(s): K. Ikushima, H. Sakuma, S. Komiyama, K. Hirakawa
  • Journal Title: Physical Review B vol. 76
  • Peer Reviewed
• [Journal Article] Terahertz radiation from ultrahigh-speed field-effect transistors induced by ultrafast optical gate switching (2007)
  • Author(s): T. Kondo, K. Hirakawa
  • Journal Title: Applied Physics Letters vol. 91
  • Peer Reviewed
• [Journal Article] Lateral electron tunneling through single self-assembled InAs quantum dots coupled to superconducting nanogap electrodes (2007)
  • Author(s): K. Shibata, C. Buizert, A. Oiwa, K. Hirakawa, S. Tarucha
  • Journal Title: Applied Physics Letters vol.91, No.11
  • Peer Reviewed
• [Journal Article] Determination of deformation potential constant of the conduction band in Si from electron heating experiments on Si metal-oxide-semiconductor field-effect transistors (2007)
  • Author(s): K. H. Park, T. Unuma, K. Hirakawa, S. Takagi
  • Journal Title: Applied Physics Letters vol.91, No.13
  • Peer Reviewed
• [Journal Article] Kondo universal scaling for a quantum dot coupled to superconducting leads (2007)
  • Author(s): C. Buizert, A. Oiwa, K. Shibata, K. Hirakawa, S. Tarucha
  • Journal Title: Physical Review Letters vol. 99 Pages: 136806-136806
  • Peer Reviewed
• [Journal Article] Spin-half Kondo effect in a single self-assembled InAs quantum dot with and without an applied magnetic field (2007)
  • Author(s): Y. Igarashi, M. Jung, M. Yamamoto, A. Oiwa, T. Machida, K. Hirakawa, S. Tarucha
  • Journal Title: Physical Review B vol. 76
  • Peer Reviewed
• [Journal Article] Dispersive Terahertz Bloch Gain in Semiconductor Superlattices (2007)
  • Author(s): K. Hirakawa, T. Unuma, N. Sekine
  • Journal Title: AIP Conferene Proceedings vol. 922 Pages: 191-191
  • Peer Reviewed
• [Journal Article] Electric-field control of tunneling magnetoresistance effect in a Ni/InAs/Ni quantum-dot spin valve (2007)
  • Author(s): K. Hamaya, M. Kitabatake, K. Shibata, M. Jung, M. Kawamura, K. Hirakawa, T. Machida
  • Journal Title: Applied Physics Letters vol.91, No.2
  • Peer Reviewed
• [Journal Article] Novel Gold Nanoparticles/Conjugated Molecules Network Structures Fabricated By Self-assembling Process (2007)
  • Author(s): Tetsuo Akasaka, Akinori Umeno, Su Heon Hong, Kazuhiko Hirakawa, Koii Araki
  • Journal Title: AIP Conferene Proceedings vol. 893 Pages: 361-361
  • Peer Reviewed
• [Journal Article] Atomistic Picture of Electromigration Process and its Application to High-yield Fabrication of Nanogap Electrodes (2007)
  • Author(s): Akinori Umeno, Tetsuo Akasaka, Su Heon Hong, Kazuhiko Hirakawa
  • Journal Title: AIP Conferene Proceedings vol. 893 Pages: 373-373
  • Peer Reviewed
• [Journal Article] Single-particle Nature of Intersubband Electronic Raman Scattering and Dynamical Manybody Effects in Narrow GaAs Quantum Wells (2007)
  • Author(s): T. Unuma, K. Kobayashi, A. Yamamoto, M. Yoshita, K. Hirakawa, Y. Hashimoto, S. Katsumoto, Y. Iye.
  • Journal Title: AIP Conferene Proceedings vol. 893 Pages: 475-475
  • Peer Reviewed
• [Journal Article] Dephasing of Bloch Oscillations due to Interface Roughness Scattering in GaAs/AlAs Superlattices (2007)
  • Author(s): Takeya Unuma, Norihiko Sekine, Kazuhiko Hirakawa
  • Journal Title: AIP Conferene Proceedings vol. 893 Pages: 495-495
  • Peer Reviewed
• [Journal Article] Low-temperature mobilities and energy loss rates of two-dimensional electrons in Si inversion layers (2007)
  • Author(s): Kyung Hwa Park, Kazuhiko Hirakawa, Shinichi Takagi
  • Journal Title: AIP Conferene Proceedings vol. 893 Pages: 601-601
  • Peer Reviewed
• [Journal Article] Electronic properties of self-assembled InAs quantum dots on GaAs surfaces probed by lateral electron tunneling structures (2007)
  • Author(s): K. Shibata, M. Jung, K. Hirakawa, T. Machida, H. Sakaki, S. Ishida, Y. Arakawa
  • Journal Title: Journal of Crystal Growth vol. 301-302 Pages: 731-734
  • Peer Reviewed
• [Journal Article] "Spin transport through a single self-assembled InAs quantum dot with ferromagnetic leads" (2007)
  • Author(s): K. Hamaya, S. Masubuchi, M, Kawamura, T. Machida, M. Jung, K. Shibata, K. Hirakawa, T. Taniyama, S. Ishida, and Y. Arakawa
  • Journal Title: Applied Physics Letters vol.90,No.5
• [Journal Article] "Mechanically Controlled Quantum Contact With On-Chip MEMS Actuator" (2007)
  • Author(s): M. Gel, T. Ishida, T. Akasaka, A. Umeno, K. Araki, K. Hirakawa, and H. Fujita
  • Journal Title: Journal of Microelectromechanical Systems vol.16,No.1 Pages: 1-6
• [Journal Article] Dephasing of Bloch oscillating electrons in GaAs-based superlattices due to interface roughness scattering (2006)
  • Author(s): T. Unuma, N. Sekine, and K. Hirakawa
  • Journal Title: Applied Physics Letters vol.89, No. 16
• [Journal Article] Carrier dynamics and dispersive terahertz Bloch gain in semiconductor superlattices(invited) (2006)
  • Author(s): K. Hirakawa and N. Sekine
  • Journal Title: Physica E vol.32, Issues 1-2 Pages: 320-324
• [Journal Article] 半導体超格子のブロッホ振動:非古典的振動子のテラヘルツ利得 (2006)
  • Author(s): 平川一彦、関根徳彦、島田洋蔵
  • Journal Title: 応用物理 No.6
  • NAID: 10019172534
• [Journal Article] "Dephasing of Bloch oscillating electrons in GaAs-based superlattices due to interface roughness scattering" (2006)
  • Author(s): T. Unuma, N. Sekine, and K. Hirakawa
  • Journal Title: Applied Physics Letters vol.89,No.16
• [Journal Article] "Scattering-assisted terahertz gain in semiconductor superlattices" (2006)
  • Author(s): Yu. A. Tarakanov, M. A. Odnoblyudov, K. A. Chao, N. Sekine, and K. Hirakawa
  • Journal Title: Physical Review B vol.74,No.12
• [Journal Article] "Terahertz radiation in superlattices in moderate electric field" (2006)
  • Author(s): P. Han, K.-J. Jin, Y.-L. Zhou, Q.-L. Zhou, and K. Hirakawa
  • Journal Title: International Journal of Modern Physics B vol.20,No.8 Pages: 937-945
• [Journal Article] "Electron transport and shell structures of single InAs quantum dots probed by nanogap electrodes" (2006)
  • Author(s): M. Jung, K. Hirakawa, S. Ishida, Y. Arakawa, and S. Komiyama
  • Journal Title: Physica E Vol.32,Issues 1-2 Pages: 187-190
• [Journal Article] "Carrier dynamics and dispersive terahertz Bloch gain in semiconductor superlattices (invited)" (2006)
  • Author(s): K. Hirakawa and N. Sekine
  • Journal Title: Physica E Vol.32,Issues 1-2 Pages: 320-324
• [Journal Article] "THz imaging of cyclotron emission in quantum Hall conductors" (2006)
  • Author(s): K. Ikushima, H. Sakuma, Y. Yoshimura, S. Komiyama, T. Ueda, and K. Hirakawa
  • Journal Title: Physica E vol.34 Pages: 22-26
• [Journal Article] "半導体超格子のブロッホ振動:非古典的振動子のテラヘルツ利得" (2006)
  • Author(s): 平川一彦、関根徳彦、島田洋蔵
  • Journal Title: 「応用物理」 No.6
  • NAID: 10019172534
• [Journal Article] "Spin-dependent edge-channel transport in a Si/SiGe quantum Hall system" (2006)
  • Author(s): K. Hamaya, S. Masubuchi, K. Hirakawa, S. Ishida, Y. Arakawa, K. Sawano, Y. Shiraki, and T. Machida
  • Journal Title: Physical Review B vol.73
• [Journal Article] "Photon-counting microscopy of terahertz radiation" (2006)
  • Author(s): K. Ikushima, Y. Yoshimura, T. Hasegawa, S. Komiyama, T. Ueda, and K. Hirakawa
  • Journal Title: Applied Physics Letters vol.88,No.15
• [Journal Article] "Electron temperature of hot spots in quantum Hall conductors" (2006)
  • Author(s): S. Komiyama, H. Sakuma, K. Ikuyshima, and K. Hirakawa
  • Journal Title: Physical Review B vol.73
• [Journal Article] "Collective and single-particle intersubband excitations in narrow quantum wells selected by infrared absorption and resonant Raman scattering" (2006)
  • Author(s): T. Unuma, K. Kobayashi, A. Yamamoto, M. Yoshita, K. Hirakawa, Y. Hashimoto, S. Katsumoto, Y. Iye, Y. Kanemitsu, and H. Akiyama
  • Journal Title: Physical Review B vol.74,No.19
• [Journal Article] "Lateral conduction quantum dot infrared photodetectors using photoionization of holes in InAs quantum dots" (2006)
  • Author(s): S.-W. Lee and K. Hirakawa
  • Journal Title: Nanotechnology vol.17,No.15 Pages: 3866-3868
• [Journal Article] "A sensitive double quantum well infrared phototransistor" (2006)
  • Author(s): Z. An, T. Ueda, J. -C. Chen, S. Komiyama, and K. Hirakawa
  • Journal Title: Journal of Applied Physics vol.100 Pages: 44509-44509
• [Journal Article] "Metastable excited states of a closed quantum dot probed by analuminum single-electron transistor" (2006)
  • Author(s): J. -C. Chen, Z. An, T. Ueda, S. Komiyama, K. Hirakawa, and V. Antonov
  • Journal Title: Physical Review B vol.74 Pages: 45321-45321
• [Journal Article] "Spectral measurement of weak THz waves with quantum Hall detectors" (2006)
  • Author(s): H. Sakuma, K. Ikushima, S. Komiyama, and K. Hirakawa
  • Journal Title: Infrared Physics and Technology vol.48,No.3 Pages: 235-239
• [Journal Article] "Spin transport through a single self-assembled InAs quantum dot with ferromagnetic leads" (2006)
  • Author(s): K. Hamaya, S. Masubuchi, M. Kawamura, T. Machida, M. Jung, K. Shibata, K. Hirakawa, T. Taniyama, S. Ishida, and Y. Arakawa
  • Journal Title: Applied Physics Letters, vol.90,No.5
• [Presentation] バルク半導体・超構造・電子デバイスの超高周波評価技術(招待講演) (2009)
  • Author(s): 平川一彦
  • Organizer: 特別ワークショップ、電子デバイス研究専門委員会
  • Place of Presentation: 首都大学東京サテライトキャンパス、東京
  • Year and Date: 2009-03-06
• [Presentation] Dispersive terahertsz Bloch gain in semiconductor superlattices (2009)
  • Author(s): K. Hirakawa, T. Ihara, Y. Sakasegawa, T. Unuma, and N. Sekine
  • Organizer: International meeting on frontiers of physics 2009 (IMFP2009)
  • Place of Presentation: Awana Genting Highlands, Malaysia(invited)
• [Presentation] Dispersive terahertz Bloch gain in semiconductor superlattices (2009)
  • Author(s): K. Hirakawa, T. Unuma, and N. Sekine
  • Organizer: GDR-E 2008 THz Workshop
  • Place of Presentation: Paris, France
• [Presentation] Very high Kondo temperature (TK 80K) in single self-assembled InAs quantum dots coupled to metallic nanogap electrodes (2009)
  • Author(s): K. Shibata, K. Hirakawa
  • Organizer: APS Physics, March Meeting
  • Place of Presentation: Pittsburgh, PA, USA
• [Presentation] Elementary process of electromigration investigated by novel spectroscopic approach to electrical break junction (2009)
  • Author(s): A. Umeno, K. Hirakawa
  • Organizer: APS Physics, March Meeting
  • Place of Presentation: Pittsburgh, PA, USA
• [Presentation] Dispersive terahertsz Bloch gain in semiconductor superlattices (invited) (2009)
  • Author(s): K. Hirakawa, T. Ihara, Y. Sakasegawa, T. Unuma, and N. Sekine
  • Organizer: International meeting on frontiers of physics 2009 (IMFP2009)
  • Place of Presentation: AwanaGenting Highlands,Malaysia
• [Presentation] テラヘルツ微小共振器と強く結合した半導体超格子のブロッホ振動 (2009)
  • Author(s): 井原章之、酒瀬川洋平、平川一彦
  • Organizer: 第56回応用物理学関係連合講演会
  • Place of Presentation: 筑波大学、茨城
• [Presentation] フォトニック結晶共振器と結合した半導体超格子中のプロツホ振動 (2009)
  • Author(s): 酒瀬川洋平、井原章之、平川一彦
  • Organizer: 第56回応用物理学関係連合講演会
  • Place of Presentation: 筑波大学、茨城
• [Presentation] フィードバック制御通電断線法を用いたNiナノ細線破断メカニズムの解明 (2009)
  • Author(s): 吉田健治、梅野顕憲、坂田修一、平川一彦
  • Organizer: 第56回応用物理学関係連合講演会
  • Place of Presentation: 筑波大学、茨城
• [Presentation] 非平衡グリーン関数法を用いたテラヘルツ帯量子カスケードレーザの解析 (2009)
  • Author(s): 安田浩朗, T. Kubis, P. Vogl, 賓迫巌, 平川一彦
  • Organizer: 第56回応用物理学関係連合講演会
  • Place of Presentation: 筑波大学、茨城
• [Presentation] ナノギャップ電極と結合した単一自己組織化InAs量子ドットの電子状態の成長温度依存性 (2009)
  • Author(s): 柴田憲治、M. Jung、K. M. Cha、関享太、平川一彦
  • Organizer: 第56回応用物理学関係連合講演会
  • Place of Presentation: 筑波大学、茨城
• [Presentation] 非平衡グリーン関数法を用いた4準位系量子カスケードレーザの解析 (2008)
  • Author(s): 安田浩朗、Tillmann Kubis、Peter Vogl、関根徳彦、神谷武志、平川一彦、賓迫巌
  • Organizer: 東北大学電気通信研究所共同研究プロジェクト: 「量子カスケードレーザの高性能化と応用に関する研究」
  • Place of Presentation: 東北大学、仙台、宮城
  • Year and Date: 2008-11-18
• [Presentation] The Kondo effect observed up to TK ~ 80 K in self-assembled InAs quantum dots laterally coupled to nanogap electrodes (2008)
  • Author(s): K. Shibata and K. Hirakawa
  • Organizer: 15th International Conference on Molecular Beam Epitaxy (MBE2008)
  • Place of Presentation: The University of British Columbia, Vancouver, Canada
• [Presentation] Negative differential conductivities and terahertz gain in bulk semiconductors and superlattices (2008)
  • Author(s): K. Hirakawa, T. Unuma, Y. M. Zhu, N. Sekine
  • Organizer: Device Research Conference (DRC 2008)
  • Place of Presentation: Santa Barbara, CA, USA(invited)
• [Presentation] Physics and applications of InAs quantum dots coupled to nanogap leads (2008)
  • Author(s): K. Hirakawa
  • Organizer: 9TH International Workshop on Expert Evaluation & Control of Compound Semiconductor Materials & Technologies (EXMATEC 2008)
• [Presentation] Nanoscale patterning of graphene using AFM local anodic oxidation (2008)
  • Author(s): K. Yoshida, S. Masubuchi, M. Ono, K. Hirakawa, and T. Machida
  • Organizer: International Symposium on Graphene Devices: Technology Physics, and Modeling (ISGD2008)
  • Place of Presentation: University of Aizu, Aizu-Wakamatsu, Japan
• [Presentation] Very high Kondo temperature (TK〜80K) in self-assembled InAs quantum dots laterally coupled to nanogap electrodes (2008)
  • Author(s): K. Shibata, K. Hirakawa
  • Organizer: IEEE Nanotechnology Materials and Devices Conference 2008 (NMDC 2008)
  • Place of Presentation: Kyoto University, Kyoto, Japan
• [Presentation] Bias-induced formation of conductive channels across metallic nanogap electrodes (2008)
  • Author(s): A. Umeno, A. Yoshida, and K. Hirakawa
  • Organizer: IEEE Nanotechnology Materials and Devices Conference 2008 (NMDC 2008)
  • Place of Presentation: Kyoto University, Kyoto, Japan
• [Presentation] Dispersive terahertz Bloch gain in semiconductor superlattices (2008)
  • Author(s): K. Hirakawa, T. Unuma, and N. Sekine
  • Organizer: GDR-E2008 THz Workshop
  • Place of Presentation: Paris, France
• [Presentation] The Kondo effect observed up to TK〜80K in self-assembled InAs quantum dots laterally coupled to nanogap electrodes (2008)
  • Author(s): K. Shibata, K. Hirakawa
  • Organizer: 15th International Conference on Molecular Beam Epitaxy (MBE2008)
  • Place of Presentation: The University of British Columbia, Vancouver, Canada,
• [Presentation] Negative differential conductivities and terahertz gain in bulk semiconductors and superlattices (invited) (2008)
  • Author(s): K. Hirakawa, T. Unuma, Y. M. Zhu, N. Sekine
  • Organizer: Device Research Conference (DRC2008)
  • Place of Presentation: Santa Barbara, CA, USA
• [Presentation] Physics and applications of InAs quantum dots coupled to nanogap leads (invited) (2008)
  • Author(s): K. Hirakawa,
  • Organizer: 9TH International Workshop on Expert Evaluation & Control of Compound Semiconductor Materials & Technologies (EXMATEC 2008)
  • Place of Presentation: Lodz, Porland
• [Presentation] フィードバック制御通電断線法を用いた原子スケール空隙を有する強磁性電極の作製 (2008)
  • Author(s): 吉田健治、梅野顕憲、坂田修一、平川一彦
  • Organizer: 秋季第69回応用物理学会学術講演会
  • Place of Presentation: 中部大学、愛知
• [Presentation] GaAs/AlAs超格子におけるTHz放射電場波形の時間原点とブロッホ振動の位相II (2008)
  • Author(s): 鵜沼毅也、平川一彦、井野雄介、五神真
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学上田キャンパス、岩手
• [Presentation] "Physics and Application of Single Quantum Dot Transistors" (invited) (2008)
  • Author(s): K. Hirakawa, K. Shibata, M. Jung, A. Umeno, T. Machida, Y. Arakawa, A. Oiwa, S. Tarucha
  • Organizer: International Symposium on Secure-Life Electronics
  • Place of Presentation: Univ. of Tokyo, Hongo cam
• [Presentation] 大信号解析による半導体THzブロッホ発振器の実現の検討 (2008)
  • Author(s): 酒瀬川洋平, 平川一彦
  • Organizer: 第55回応用物理学関係連合講演会
  • Place of Presentation: 日本大学、千葉
• [Presentation] 二重障壁共鳴トンネル高感度光検出構造における光励起正孔の寿命 (2008)
  • Author(s): 坂田祐輔, 竹中聡, 柴田憲治, 平川一彦
  • Organizer: 第55回応用物理学関係連合講演会
  • Place of Presentation: 日本大学、千葉
• [Presentation] 金ナノ接合における通電時の部分破壊・修復モードの存在 (2008)
  • Author(s): 海野顕憲, 吉田健治, 平川一彦
  • Organizer: 第55回応用物理学関係連合講演会
  • Place of Presentation: 日本大学、千葉
• [Presentation] ナノギャップ電極と結合した自己組織化InAs量子ドットにおける高い近藤温度(TK〜85K)の観測 (2008)
  • Author(s): 柴田憲治, M. Jung, 平川一彦, 石田悟己, 荒川泰彦
  • Organizer: 第55回応用物理学関係連合講演会
  • Place of Presentation: 日本大学、千葉
• [Presentation] 二重障壁共鳴トンネル構造を用いた高感度光検出(II) (2008)
  • Author(s): 竹中聡, 坂田祐輔, 柴田憲治, 平川一彦
  • Organizer: 第55回応用物理学関係連合講演会
  • Place of Presentation: 日本大学、千葉
• [Presentation] 強磁性/半導体量子ドット/非磁性電極ナノ接合における電気伝導特性 (2008)
  • Author(s): 北畠未来, 濱屋宏平, 柴田憲浴, M. Jung, 川村稔, 石田悟巳, 谷山智康, 平川一彦, 荒川泰彦, 町田友樹
  • Organizer: 第55回応用物理学関係連合講演会
  • Place of Presentation: 日本大学、千葉
• [Presentation] マイクロ流体素子を用いた極微量水溶液試料のテラヘルツ分光(II) (2008)
  • Author(s): 広瀬展明, 平川一彦, 久米村百子, 藤田博之
  • Organizer: 第55回応用物理学関係連合講演会
  • Place of Presentation: 日本大学、千葉
• [Presentation] GaAs/AlAs超格子におけるTHz放射電場波形の時間原点とブロッホ振動の位相 (2008)
  • Author(s): (13)鵜沼毅也, 平川一彦, 井野雄介, 五神真
  • Organizer: 日本物理学会第63回年次大会
  • Place of Presentation: 近畿大学、大阪
• [Presentation] 半導体超格子中のブロッホ振動のダイナミクスとテラヘルツ利得 (2008)
  • Author(s): 平川一彦, 鵜沼毅也, 関根徳彦, 井野雄介, 五神真
  • Organizer: 量子エレクトロニクス研究会・テラヘルツ電磁波技術研究会合同研究会「テラヘルツ分光・イメージングとテラヘルツデバイスの物理」
  • Place of Presentation: 上智大学軽井沢セミナーハ
• [Presentation] フェムト秒レーザを用いたコヒーレント・テラヘルツ光の発生と分光 (2007)
  • Author(s): 平川一彦
  • Organizer: コヒーレントユーザーズセミナー
  • Place of Presentation: コヒーレント・ジャパン、東京
  • Year and Date: 2007-10-23
• [Presentation] 半導体量子構造がもたらすテラヘルツ光源・検出器の新展開 (2007)
  • Author(s): 平川一彦
  • Organizer: 講演会、(株)デンソー
  • Place of Presentation: 愛知県
  • Year and Date: 2007-08-08
• [Presentation] Probing Quantum Dots by Nanogap Electrodes (2007)
  • Author(s): K. Hirakawa, K. Shibata, A. Umeno, M. Jung, T. Machida, S. Tarucha
  • Organizer: 1st NNL-IIS workshop on nanotechnology
  • Place of Presentation: Komaba, Tokyo
  • Year and Date: 2007-05-16
• [Presentation] Electron tunneling through single self-assembled InAs quantum dots coupled to nanogap electrodes (2007)
  • Author(s): K. Shibata, M. Jung, C. Buizert, A. Oiwa, K. Hirakawa, T. Machida, S. Tarucha
  • Organizer: 34th International Symposium on Compound Semiconductors(ISCS2007)
  • Place of Presentation: Kyoto, Japan
• [Presentation] Dispersive terahertz Bloch gain in semiconductor superlattices (invited) (2007)
  • Author(s): K. Hirakawa, T. Unuma, and N. Sekine
  • Organizer: 19th International Conference on Noise and International Conference on Noise and Fluctuations(icnf 2007)
  • Place of Presentation: Yoyogi, Tokyo, Japan
• [Presentation] Femtosecond electron acceleration in bulk GaAs investigated by time-domain THz spectroscopy (2007)
  • Author(s): Y. M. Zhu, T. Umuna, K. Shibata, and K. Hirakawa
  • Organizer: The 7th Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim 2007)
  • Place of Presentation: COEX Convention Center, Seoul, Korea
• [Presentation] Negative differential conductivities and terahertz gain in bulk semiconductors and superlattices (2007)
  • Author(s): K. Hirakawa, T. Unuma, Y.M. Zhu, and N. Sekine
  • Organizer: 7th Topical Workshop on Heterostructure Microelectronics(TWHM2007)
  • Place of Presentation: Kazusa Arc, Kisarazu, Chiba
• [Presentation] Femtosecond very high-field transport in bulk GaAs investigated by time-domain terahertz spectroscopy (2007)
  • Author(s): Y. M. Zhu, T. Unuma, K. Shibata, and K.Hirakawa
  • Organizer: 15th International Conference on Nonequilibrium Carrier Dynamics in Semiconductors (HCIS 15)
  • Place of Presentation: University of Tokyo Hongo campus, Tokyo, Japan
• [Presentation] Temporal origin of terahertz emission and the initial phase of Bloch oscillations in GaAs/AlAs superlattices (2007)
  • Author(s): T. Unuma, K. Hirakawa, Y. Ino, and M. Kuwata-Gonokami
  • Organizer: 15th International Conference on Nonequilibrium Carrier Dynamics in Semiconductors (HCIS 15)
  • Place of Presentation: University of Tokyo Hongo campus, Tokyo, Japan
• [Presentation] Electron tunneling through single self-assembled InAs quantum dots coupled to nanogap electrodes (2007)
  • Author(s): K. Shibata, M. Jung, C. Buizert, A. Oiwa, K. Hirakawa, T. Machida, S. Tarucha
  • Organizer: 34th International Symposium on Compound Semiconductors (ISCS2007)
  • Place of Presentation: Kyoto, Japan
• [Presentation] Dispersive Terahertz Bloch Gain in Semiconductor Superlattices (invited) (2007)
  • Author(s): K. Hirakawa, T. Unuma, N. Sekine
  • Organizer: 19th International Conference on Noise and Fluctuations (icnf 2007)
  • Place of Presentation: Yoyogi, Tokyo, Japan
• [Presentation] Femtosecond Electron Acceleration in Bulk GaAs Investigated by Time-Domain THz Spectroscopy (2007)
  • Author(s): Y. M. Zhu, T. Umuna, K. Shibata, K. Hirakawa
  • Organizer: The 7th Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim 2007)
  • Place of Presentation: COEX Convention Center
• [Presentation] Negative differential conductivities and terahertz gain in bulk semiconductors and superlattices (2007)
  • Author(s): K. Hirakawa, T. Unuma, Y. M. Zhu, N. Sekine
  • Organizer: 7th Topical Workshop on Heterostructure Microelectronics (TWHM2007)
  • Place of Presentation: Kazusa Arc, Kisarazu, Chib
• [Presentation] Femtosecond Very High-Field Transport in Bulk GaAs Investigated by Time-Domain Terahertz Spectroscopy (2007)
  • Author(s): Y. M. Zhu, T. Unuma, K. Shibata, K. Hirakawa
  • Organizer: 15th International Conference on Nonequilibrium Carrier Dynamics in Semiconductors (HCIS 15)
  • Place of Presentation: University of Tokyo Hongo
• [Presentation] Temporal Origin of Terahertz Emission and the Initial Phase of Bloch Oscillations in GaAs/AlAs Superlattices (2007)
  • Author(s): T. Unuma, K. Hirakawa, Y. Ino, M. Kuwata-Gonokami
  • Organizer: 15th International Conference on Nonequilibrium Carrier Dynamics in Semiconductors (HCIS 15)
  • Place of Presentation: University of Tokyo Hongo
• [Presentation] Electron transport through single self-assembled InAs quantum dots coupled to superconducting nanogap electrodes (2007)
  • Author(s): K. Shibata, C. Buizert, A. Oiwa, K. Hirakawa, S. Tarucha
  • Organizer: 15th International Conference on Nonequilibrium Carrier Dynamics in Semiconductors (HCIS 15)
  • Place of Presentation: University of Tokyo Hongo
• [Presentation] 単一InAs量子ドットを介したスピン依存トンネル伝導 (2007)
  • Author(s): 浜屋宏平, 北畠未来, 柴田憲治, M. Jung, 川村稔, 石田悟己, 谷山智康, 平川一彦, 荒川一彦, 町田友樹
  • Organizer: 第31回日本応用磁気学会学術講演会
  • Place of Presentation: 学習院大学、東京
• [Presentation] 超伝導ナノギャップ電極と結合した単一自己組織化InAs量子ドットにおける電気伝導特性 (2007)
  • Author(s): 柴田憲治, C. Buizert, 大岩顕, 平川一彦, 樽茶清悟
  • Organizer: 応用物理学会第68回学術講演会
  • Place of Presentation: 北海道工業大学、北海道
• [Presentation] 単一自己形成InAs量子ドットのスピン依存伝導特性 (2007)
  • Author(s): 北畠未来, 浜屋宏平, 川村稔, M. Jung, 柴田憲治, 平川一彦, 石田悟己, 荒川泰彦, 谷山智康, 町田友樹
  • Organizer: 応用物理学会第68回学術講演会
  • Place of Presentation: 北海道工業大学、北海道
• [Presentation] 2重障壁共鳴トンネル構造を用いた高感度光検出 (2007)
  • Author(s): 竹中聡, 柴田憲治, 平川一彦
  • Organizer: 応用物理学会第68回学術講演会
  • Place of Presentation: 北海道工業大学、北海道
• [Presentation] 高電界下におけるショートチャネルGaAs中のキャリアの初期加速 (2007)
  • Author(s): 朱亦鳴, 鵜沼毅也, 柴田憲治, 平川一彦
  • Organizer: 応用物理学会第68回学術講演会
  • Place of Presentation: 北海道工業大学、北海道
• [Presentation] マイクロ流体素子を用いた極微量水溶液試料のテラヘルツ分光 (2007)
  • Author(s): 広瀬展明, 永渕誠之, 平川一彦, 久米村百子, 藤田博之
  • Organizer: 応用物理学会第68回学術講演会
  • Place of Presentation: 北海道工業大学、北海道
• [Presentation] ナノギャップ電極先端における電圧印加による構造揺らぎの観察 (2007)
  • Author(s): 梅野顕憲, 平川一彦
  • Organizer: 応用物理学会第68回学術講演会
  • Place of Presentation: 北海道工業大学、北海道
• [Presentation] 強磁性電極/半導体量子ドットからなる単電子トランジスタのスピン伝導特性 (2007)
  • Author(s): 浜屋宏平, 北畠未来, 柴田憲治, M. Jung, 川村稔, 平川一彦, 石田悟己, 荒川泰彦, 谷山智康, 町田友樹
  • Organizer: 応用物理学会第68回学術講演会
  • Place of Presentation: 北海道工業大学、北海道
• [Presentation] 強磁性電極を有する単電子トランジスタにおけるトンネル磁気抵抗効果の電界制御 (2007)
  • Author(s): 浜屋宏平, 北畠未来, 柴田憲治, M. Jung, 川村稔, 石田悟己, 谷山智康, 平川一彦, 荒川一彦, 町田友樹
  • Organizer: 応用物理学会第68回学術講演会
  • Place of Presentation: 北海道工業大学、北海道
• [Book] 発光と受光の物理と応用(光電相互変換第125委員会,量子ナノ構造とテラヘルツ光デバイス,日本学術振興会) (2008)
  • Author(s): 平川一彦
  • Publisher: 培風館
• [Book] 量子ナノ構造とテラヘルツ光デバイス(6.7) (2008)
  • Author(s): 平川一彦
  • Total Pages: 18
  • Publisher: 日本学術振興会 光電相互変換第125委員全編「発光と受光の物理と応用」(分担執筆)、培風館
• [Book] "量子ナノ構造とテラヘルツ光デバイス"(6. 7) (2008)
  • Author(s): 平川一彦
  • Total Pages: 3
  • Publisher: 日本学術振興会 光電相互変換第125委員会編「発光と受光の物理と応用」(分担執筆)、培風
• [Book] テラヘルツ技術総覧(半導体超格子とブロッホ振動,(第8 章テラヘルツの科学、第一節半導体、8.1.4.1)) (2007)
  • Author(s): 平川一彦
  • Publisher: NGT
• [Book] 非侵襲・可視化技術ハンドブック(半導体極微細構造中の電子の動きを直接観る(第10 章、第4 節)) (2007)
  • Author(s): 平川一彦
  • Publisher: NTS
• [Book] 未開拓の光:テラヘルツ電磁波技術の新展開 (2007)
  • Author(s): 平川一彦
  • Total Pages: 8
  • Publisher: 生産研究
• [Book] "半導体極微細構造中の電子の動きを直接観る"(第10章、第4節) (2007)
  • Author(s): 平川一彦
  • Total Pages: 7
  • Publisher: 「非侵襲・可視化技術ハンドブック」、NTS
• [Book] "半導体超格子とブロッホ振動"(第8章テラヘルツの科学、第一節半導体、8. 1. 4. 1) (2007)
  • Author(s): 平川一彦
  • Total Pages: 5
  • Publisher: 「テラヘルツ技術総覧」、NGT
• [Book] "自由電子とテラヘルツ電磁波の相互作用"(第8章テラヘルツの科学、第一節半導体、8. 1. 1) (2007)
  • Author(s): 平川一彦
  • Total Pages: 4
  • Publisher: 「テラヘルツ技術総覧」、NGT
• [Book] "テラヘルツ波発生・検出デバイス"(第3章、第5節) (2007)
  • Author(s): 平川一彦
  • Total Pages: 2
  • Publisher: 薄膜ハンドブック
• [Book] 高周波半導体材料・デバイスの新展開(テラヘルツ波半導体デバイス,エレクトロニクス材料・技術シリーズ) (2006)
  • Author(s): 平川一彦
  • Publisher: シーエムシー出版
• [Book] 「科学立国日本を築く 極限に挑む気鋭の研究者たち(分担執筆)」"半導体量子構造が拓くテラヘルツデバイスの可能性" (2006)
  • Author(s): 平川一彦
  • Publisher: 丸文研究交流財団刊
• [Book] 「電子材料ハンドブック(分担執筆)」"量子効果デバイス"(3.3.7節) (2006)
  • Author(s): 平川一彦
  • Total Pages: 9
  • Publisher: 朝倉書店
• [Book] 「電子材料ハンドブック(分担執筆)」"固体接合と量子構造"(1.5章) (2006)
  • Author(s): 平川一彦
  • Total Pages: 12
  • Publisher: 朝倉書店
• [Book] 「表面物性工学ハンドブック(分担執筆)」 "半導体超薄膜ヘテロ構造・超格子の伝導"(11.3.1節) (2006)
  • Author(s): 平川一彦
  • Publisher: 丸善
• [Book] 「ナノフォトニクス(分担執筆)」"量子ドット光検出器" (2006)
  • Author(s): 平川一彦
  • Publisher: コロナ社
• [Book] エレクトロニクス材料・技術シリーズ「高周波半導体材料・デバイスの新展開」"テラヘルツ波半導体デバイス" (2006)
  • Author(s): 平川一彦
  • Total Pages: 16
  • Publisher: シーエムシー出版
• [Patent(Industrial Property Rights)] 量子カスケードレーザー (2006)
  • Inventor(s): 関根徳彦、川一彦
  • Industrial Property Rights Holder: 独立行政法人情報通信研究機構
  • Filing Date: 2006-06-30
• [Patent(Industrial Property Rights)] 「量子カスケードレーザー」 (2006)
  • Inventor(s): 関根徳彦、平川一彦
  • Industrial Property Rights Holder: (独)情報通信研究機構
  • Industrial Property Number: 2006-181502
  • Filing Date: 2006-06-30