THz carrier dynamics in single-molecule junctions

• Project/Area Number: 16K17481
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Nanostructural physics
• Research Institution: The University of Tokyo
• Principal Investigator: YOSHIDA KENJI 東京大学, 生産技術研究所, 助教 (50738599)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2016: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: テラヘルツ / 量子ナノ構造 / 量子物性 / 単一分子接合 / カーボンナノチューブ / 単一分子 / ナノ構造物性 / 量子ドット / ナノエレクトロニクス / 近藤効果 / 物性実験 / メゾスコピック系 / マイクロ・ナノデバイス

Outline of Final Research Achievements

Characteristic physical energies in single-molecule junctions lie in the terahertz frequency regime. They are expected to strongly interact with THz photons and THz electromagnetic waves have an impact on carrier dynamics in single-molecule junctions. However, experimental reports of electron transport in single-molecule junctions have so far been done in the DC regime, and the carrier dynamics has not been clear yet. In this research, we fabricated single-molecule transistors and analyzed THz-induced photocurrents generated by irradiating external THz electromagnetic fields onto the devices. By using this spectroscopic method, we successfully observed center-of-mass oscillation of organic molecules, which is a demonstration of THz spectroscopy at the single-molecule level. Furthermore, we applied the same method to single carbon-nanotube molecules and succeeded in observing THz-intersublevel transisions.

Research Products

• [Int'l Joint Research] DGIST(韓国)
• [Int'l Joint Research] パリ高等師範学校(フランス)
• [Journal Article] Quantum Dots Formed in Three-dimensional Dirac Semimetal Cd3As2 Nanowires (2018)
  • Author(s): M. Jung, K. Yoshida., K. Park, X.-X. Zhang, C. Yesilyurt, Z. B. Siu, M. B. A. Jalil, J.W. Park, J. Park, N. Nagaosa, J. Seo, and K. Hirakawa
  • Journal Title: Nano Letters Volume: 18 Issue: 3 Pages: 1863-1868
  • DOI: 10.1021/acs.nanolett.7b05165
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Electric-field control of conductance in metal quantum point contacts by electric-double-layer gating (2017)
  • Author(s): K. Shibata, K. Yoshida, K. Daiguji, H. Sato, T. Ii, and K. Hirakawa
  • Journal Title: Ａｐｐｌｉｅｄ Ｐｈｙｓｉｃｓ Ｌｅｔｔｅｒｓ Volume: 111 Issue: 15 Pages: 153104-153104
  • DOI: 10.1063/1.4995318
  • Peer Reviewed
• [Journal Article] Stochastic resonance in bistable atomic switches (2017)
  • Author(s): K. Yoshida, and K. Hirakawa
  • Journal Title: Nanotechnology Volume: 28, no. 12 Issue: 12 Pages: 125205-125205
  • DOI: 10.1088/1361-6528/aa5ee1
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Coupling a terahertz cavity to a carbon nanotube quantum dot (2018)
  • Author(s): F. Valmorra, K. Yoshida, L. Contamin, T. Cubaynes, M. Dartiailh, M. Desjardins, S. Massabeau, K. Hirakawa, J. Mangeney, A. Cottet, and T. Kontos
  • Organizer: DPG Spring Meeting
  • Int'l Joint Research
• [Presentation] Rotation effect in endohedral metallofullerene Ce@C82 single-molecule transistors (2018)
  • Author(s): 唐九君、杜少卿、吉田健治、張亜、平川一彦
  • Organizer: 第65回応用物理学会春季学術講演会
• [Presentation] テラヘルツ分光による単一カーボンナノチューブ量子ドットの電子状態の評価 (2018)
  • Author(s): 鶴谷拓磨、吉田健治、矢島史彬、清水麻希、本間芳和、平川一彦
  • Organizer: 第65回応用物理学会春季学術講演会
• [Presentation] 単一カーボンナノチューブ量子ドットのテラヘルツ分光 (2018)
  • Author(s): 吉田健治、鶴谷琢磨、矢島文彬、清水麻希、本間芳和、平川一彦
  • Organizer: 新学術領域「ハイブリッド量子科学」第六回領域会議
• [Presentation] 金属内包Ce@C82単一分子トランジスタにおける分子回転効果 (2018)
  • Author(s): 唐九君、杜少卿、吉田健治、張亜、平川一彦
  • Organizer: 新学術領域「ハイブリッド量子科学」第六回領域会議
• [Presentation] Coupling a terahertz cavity to a carbon nanotube quantum dot (2018)
  • Author(s): F. Valmorra, K. Yoshida, L. Contamin, T. Cubaynes, M. Dartiailh, M. Desjardins, S. Massabeau, K. Hirakawa, J. Mangeney, A. Cottet, T. Kontos
  • Organizer: 新学術領域「ハイブリッド量子科学」第六回領域会議
  • Invited
• [Presentation] Sensing a single atom in a single Ce@C82 endohedral metallofullerene by terahertz radiation (2017)
  • Author(s): S. Du, Y. Zhang , K. Yoshida, K. Hirakawa
  • Organizer: 第64回応用物理学会春季学術講演会
  • Place of Presentation: パシフィコ横浜、横浜市
  • Year and Date: 2017-03-14
• [Presentation] Ionic Liquid Gating of Metal Contacts: Effect of Cation Size (2017)
  • Author(s): C. Li, K. Yoshida, K. Shibata, S. Ono, and K. Hirakawa
  • Organizer: 第64回応用物理学会春季学術講演会
  • Place of Presentation: パシフィコ横浜、横浜市
  • Year and Date: 2017-03-14
• [Presentation] 単一分子伝導のテラヘルツダイナミクス (2017)
  • Author(s): 平川一彦、杜少卿、吉田健治、張亜、濱田幾太郎
  • Organizer: 新学術領域ハイブリッド量子科学 第4回領域会議
  • Place of Presentation: 理化学研究所、和光市
  • Year and Date: 2017-02-27
• [Presentation] Terahertz Spectroscopy of Single Molecules Using Nanogap Metal Electrodes (2017)
  • Author(s): S. Du, K. Yoshida, Y. Zhang, I. Hamada, K. Hirakawa
  • Organizer: 新学術領域ハイブリッド量子科学 第4回領域会議
  • Place of Presentation: 理化学研究所、和光市
  • Year and Date: 2017-02-27
• [Presentation] Terahertz spectroscopy of single molecules and single atoms (2017)
  • Author(s): K, Hirakawa, S. Du, K. Yoshida, C.Tang, and Y. Zhang
  • Organizer: ngle atoms”, 4th International Symposium on Microwave/Terahertz Science and Applications (MTSA 2017)
  • Int'l Joint Research
• [Presentation] Terahertz spectroscopy of single molecules and single atoms far beyond the diffraction limit (2017)
  • Author(s): K, Hirakawa, S. Du, K. Yoshida, and Y. Zhang
  • Organizer: Russia-Japan-USA-Europe Symposium on Fundamental & Applied Problems of Terahertz Devices & Technologies (RJUSE TeraTech 2017)
  • Int'l Joint Research
• [Presentation] Terahertz spectroscopy of a single atom in a fullerene cage (2017)
  • Author(s): S. Du, Y. Zhang, K. Yoshida, and K. Hirakawa
  • Organizer: International Symposium on Hybrid Quantum Systems 2017 (HQS2017)
  • Int'l Joint Research
• [Presentation] Terahertz Spectroscopy of Carbon Nanotube Quantum Dots Performed by Detecting THz-induced Photocurrent in the Single Electron Transistor Geom (2017)
  • Author(s): T. Tsurugaya, K. Yoshida, F. Yajima, M. Shimizu, Y. Homma, S.Q. Du, Y. Zhang, and K. Hirakawa
  • Organizer: International Symposium on Hybrid Quantum Systems 2017 (HQS2017)
  • Int'l Joint Research
• [Presentation] Terahertz spectroscopy of a single atom in a fullerene cage (2017)
  • Author(s): S. Du, Y. Zhang, K. Yoshida, and K. Hirakawa
  • Organizer: 42 International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz 2017)
  • Int'l Joint Research
• [Presentation] erahertz dynamics of electron-vibron coupling in single molecules with tunable electrostatic potential (2017)
  • Author(s): S. Du, K. Yoshida, Y. Zhang, I. Hamada, and K. Hirakawa
  • Organizer: The 20th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures (EDISON20)
  • Int'l Joint Research
• [Presentation] テラヘルツ電磁波を用いた金属内包Ce@C82 フラーレン分子内の単一Ce 原子の観測 (2017)
  • Author(s): S.Q. Du, Y. Zhang、吉田健治、C.C. Tang、平川一彦
  • Organizer: 新学術領域「ハイブリッド量子科学」 第五回領域会議
• [Presentation] ナノギャップ電極を用いた単一カーボンナノチューブのテラヘルツ分光 (2017)
  • Author(s): 鶴谷拓磨、吉田健治、矢島史彬、清水麻希、本間芳和、平川一彦
  • Organizer: 新学術領域「ハイブリッド量子科学」 第五回領域会議
• [Presentation] Terahertz spectroscopy of a single atom in a fullerene cage (2017)
  • Author(s): 杜少卿、張亜、吉田健治、唐九君、平川一彦
  • Organizer: 第8回 光電子融合ワークショップ--若手による成果報告
• [Presentation] Ptナノギャップ接合におけるトンネル磁気抵抗効果 (2017)
  • Author(s): 吉田健治、平川一彦
  • Organizer: 第78回応用物理学会秋季学術講演会
• [Presentation] ボウタイアンテナ型電極を用いたカーボンナノチューブ単一電子トランジスタへのテラヘルツ光集光とその光応答 (2017)
  • Author(s): 鶴谷拓磨、吉田健治、矢島史彬、清水麻希、本間芳和、平川一彦
  • Organizer: 第78回応用物理学会秋季学術講演会
• [Presentation] Seeing single molecules with long wavelength terahertz radiation (2016)
  • Author(s): K. Hirakawa, S. Du, K. Yoshida, and Y. Zhang
  • Organizer: Workshop University of Tokyo/ENS
  • Place of Presentation: Paris, France
  • Year and Date: 2016-11-16
  • Int'l Joint Research / Invited
• [Presentation] 強磁性ナノ接合における近藤効果の観測 (2016)
  • Author(s): 吉田健治、平川一彦
  • Organizer: 第77回応用物理学会秋季学術講演会
  • Place of Presentation: 朱鷺メッセ：新潟コンベンションセンター、新潟市
  • Year and Date: 2016-09-13
• [Presentation] InP(311)B 面上に成長したInAs 量子ドットの電気伝導特性 (2016)
  • Author(s): 和田直樹、張亜、吉田健治、赤羽浩一、平川一彦
  • Organizer: 第77回応用物理学会秋季学術講演会
  • Place of Presentation: 朱鷺メッセ：新潟コンベンションセンター、新潟市
  • Year and Date: 2016-09-13
• [Presentation] 電気化学エッチングにより作製した金属量子ポイントコンタクトの電界変調 (2016)
  • Author(s): 阿部千夏、柴田憲治、吉田健治、平川一彦
  • Organizer: 第77回応用物理学会秋季学術講演会
  • Place of Presentation: 朱鷺メッセ：新潟コンベンションセンター、新潟市
  • Year and Date: 2016-09-13
• [Presentation] Nanomechanical oscillation in single-C60 transistors investigated by time-domain terahertz spectroscopy (2016)
  • Author(s): S. Du, Y. Zhang, K. Yoshida, and K. Hirakawa
  • Organizer: the 8th Edition of the International Conference on Molecular Electronics (ElecMol)
  • Place of Presentation: Paris, France
  • Year and Date: 2016-08-22
  • Int'l Joint Research
• [Presentation] Vibron-assisted tunneling in single Ce@C82 molecule transistors investigated by terahertz spectroscopy (2016)
  • Author(s): S. Du, Y. Zhang, K. Yoshida, and K. Hirakawa
  • Organizer: the 33rd International Conference on the Physics of Semiconductors (ICPS2016)
  • Place of Presentation: Beijing, China
  • Year and Date: 2016-07-31
  • Int'l Joint Research
• [Presentation] Electric-field tuning of conductance in metal quantum point contacts”, the 19th International Conference on Superlattices (2016)
  • Author(s): K. Shibata, K. Yoshida, and K. Hirakawa
  • Organizer: the 19th International Conference on Superlattices, Nanostructures and Nanodevices (ICSNN 2016)
  • Place of Presentation: Hong Kong, China
  • Year and Date: 2016-07-25
  • Int'l Joint Research
• [Presentation] Stochastic resonance in an atomic switch (2016)
  • Author(s): K. Yoshida, and K. Hirakawa
  • Organizer: the 19th International Conference on Superlattices, Nanostructures and Nanodevices (ICSNN 2016)
  • Place of Presentation: Hong Kong, China
  • Year and Date: 2016-07-25
  • Int'l Joint Research
• [Presentation] Terahertz spectroscopy of single Ce-doped C82 molecules using sub-nm-scale gap electrodes (2016)
  • Author(s): S. Du, K. Yoshida, Y. Zhang, and K. Hirakawa
  • Organizer: the 43rd International Symposium on Compound Semiconductors (ISCS2016)
  • Place of Presentation: 富山国際会議場、富山市
  • Year and Date: 2016-06-26
  • Int'l Joint Research
• [Presentation] Photon-Assisted Tunneling in Single-Molecule Transistors Induced by Terahertz Radiation Enhanced in the Sub-nm Gap Electrodes (2016)
  • Author(s): K. Yoshida, K. Shibata, and K. Hirakawa
  • Organizer: CIQM Frontiers in Quantum Materials and Devices Workshop, RIKEN Wako Campus
  • Place of Presentation: 理化学研究所、和光市
  • Year and Date: 2016-06-13
  • Int'l Joint Research
• [Presentation] Terahertz spectroscopy of single molecules using sub-nm scale gap electrodes (2016)
  • Author(s): S. Du, Y. Zhang, K. Yoshida, and K. Hirakawa
  • Organizer: CIQM Frontiers in Quantum Materials and Devices Workshop, RIKEN Wako Campus
  • Place of Presentation: 理化学研究所、和光市
  • Year and Date: 2016-06-13
  • Int'l Joint Research
• [Presentation] ナノギャップ金属電極とテラヘルツナノサイエンス (2016)
  • Author(s): 平川一彦、吉田健治、張亜、杜少卿、柴田憲治
  • Organizer: 第140回微小光学研究会「微小光学から見る『光と電波の境界領域』」
  • Place of Presentation: 日本女子大学、文京区、東京
  • Invited