Control of single charge/and spin states using terahertz wave

• Project/Area Number: 26706002
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Nanostructural physics
• Research Institution: Tohoku Institute of Technology
• Principal Investigator: Shibata Kenji 東北工業大学, 工学部, 准教授 (00436578)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥22,360,000 (Direct Cost: ¥17,200,000、Indirect Cost: ¥5,160,000); Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000); Fiscal Year 2015: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000); Fiscal Year 2014: ¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
• Keywords: テラヘルツ / 量子ドット / トランジスタ / テラヘルツ電磁波 / トンネル効果 / テラヘルツ/赤外材料・素子 / マイクロ・ナノデバイス / テラヘルツ波

Outline of Final Research Achievements

Electrical manipulation and read-out of quantum states in zero-dimensional quantum dots by nanogap metal electrodes is expected to bring about innovation in quantum information processing. In this study, we established a method for performing terahertz spectroscopy on single 10nm scale quantum dots by using nanogap metal electrodes. Inter-sublevel transition spectra of single quantum dots are successfully measures for the first time and the electron-electron interaction are discussed for a single quantum dot. We also succeeded in demonstrating the THz spectroscopy for single molecular transistors. These works are opening a way for novel quantum information applications on self-assembled QD systems.

Research Products

• [Int'l Joint Research] Ecole Normale Superieure(France)
• [Int'l Joint Research] Ecole Normale Superieure(France)
• [Int'l Joint Research] ＥＴＨ, Ｚｕｒｉｃｈ(Switzerland)
• [Int'l Joint Research] Ecole Normale Superieure(France)
• [Journal Article] 並列二重量子ドットジョセフソン接合におけるクーパー対分離とスピンもつれ相関の検出 (2016)
  • Author(s): ラッセル スチュワート ディーコン, 大岩 顕, ユルゲン ザイラー, 馬場翔二, 金井康, 柴田憲治, 平川一彦, 樽茶清悟
  • Journal Title: 固体物理 Volume: 51 Pages: 287-293
  • NAID: 40020861548
• [Journal Article] Excited-state charging energies in quantum dots investigated by terahertz photocurrent spectroscopy (2016)
  • Author(s): Y. Zhang, K. Shibata, N. Nagai, C. Ndebeka-Bandou, G. Bastard, and K. Hirakawa
  • Journal Title: Physical Review B Volume: 93 Issue: 23 Pages: 235313-235313
  • DOI: 10.1103/physrevb.93.235313
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Superconducting transport in single and parallel double InAs quantum dot Josephson junctions with Nb-based superconducting electrodes (2015)
  • Author(s): S. Baba, J. Sailer, R. S. Deacon, A. Oiwa, K. Shibata, K. Hirakawa, and S. Tarucha
  • Journal Title: Applied Physics Letters Volume: 107 Issue: 22 Pages: 222602-222602
  • DOI: 10.1063/1.4936888
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Terahertz Field Enhancement and Photon-Assisted Tunneling in Single-Molecule Transistors (2015)
  • Author(s): K. Yoshida, K. Shibata, and K. Hirakawa
  • Journal Title: Phys. Rev. Lett. Volume: 115 Issue: 13
  • DOI: 10.1103/physrevlett.115.138302
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Gate-controlled terahertz single electron photovoltaic effect in self-assembled InAs quantum dots (2015)
  • Author(s): Y. Zhang, K. Shibata, N. Nagai, C. Ndebeka-Bandou, G. Bastard, and K. Hirakawa
  • Journal Title: Applied Physics Letters Volume: 107 Issue: 10
  • DOI: 10.1063/1.4930023
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] "Cooper pair splitting in parallel quantum dot Josephson junctions" (2015)
  • Author(s): R.S. Deacon, A. Oiwa, J. Sailer, S. Baba, Y. Kanai, K. Shibata, K.Hirakawa, S. Tarucha
  • Journal Title: Nature Communications Volume: vol. 6, article no. 7446 Issue: 1 Pages: 1-6
  • DOI: 10.1038/ncomms8446
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Probing many-body quantum states in single InAs quantum dots: Terahertz and tunneling spectroscopy (2015)
  • Author(s): Y. Zhang, K. Shibata, N. Nagai, C. Ndebeka-Bandou, G. Bastard, and K. Hirakawa
  • Journal Title: Physical Review B Volume: 91 Issue: 24
  • DOI: 10.1103/physrevb.91.241301
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] “Terahertz intersublevel transitions in single self-assembled InAs quantum dots with variable electron numbers” (2015)
  • Author(s): Y. Zhang, K. Shibata, N. Nagai, C. Ndebeka-Bandou, G. Bastard, and K. Hirakawa
  • Journal Title: Nano Letters Volume: vol. 15 Issue: 2 Pages: 1166-1170
  • DOI: 10.1021/nl5042319
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] “Cross-sectional transmission electron microscopy analysis of a single self-assembled quantum dot single electron transistor fabricated by atomic force microscope local oxidation” (2014)
  • Author(s): R. Moriya, E. Ikenaga, K. Shibata, K. Hirakawa, S. Masubuchi, and T. Machida
  • Journal Title: Japanese Journal of Applied Physics Volume: vol. 53 Issue: 4 Pages: 045202-045202
  • DOI: 10.7567/jjap.53.045202
  • NAID: 210000143529
  • Peer Reviewed
• [Presentation] 単一lnSb量子ドットトランジスタの作製と伝導特性の評価 (2017)
  • Author(s): 飯野裕貴、荒井啓朗、柴田憲治
  • Organizer: 平成28年東北地区若手研究者研究発表会
  • Place of Presentation: 東北学院大学工学部
  • Year and Date: 2017-03-04
• [Presentation] イオン液体を用いた金属量子ポイントコンタクトの電界変調 (2017)
  • Author(s): 佐藤悠宇、伊井貴彦、柴田憲治
  • Organizer: 平成28年東北地区若手研究者研究発表会
  • Place of Presentation: 東北学院大学工学部
  • Year and Date: 2017-03-04
• [Presentation] イオン液体を用いた電気化学エッチングによる金属ナノ構造の微細化とその電界変調 (2017)
  • Author(s): 佐々木秀隆、阿部千夏、柴田憲治
  • Organizer: 平成28年東北地区若手研究者研究発表会
  • Place of Presentation: 東北学院大学工学部
  • Year and Date: 2017-03-04
• [Presentation] Transport throught InSb self- assembled quantum dots coupled to nanogap metal electrodes (2016)
  • Author(s): K. Shibata, M. Ohmori, H. Sakaki and K. Hirakawa
  • Organizer: 2016 Workshop on Innovative Nanoscale Devices and Systems (WINDS16)
  • Place of Presentation: Kohara Coast, Hawaii, USA
  • Year and Date: 2016-12-06
  • Int'l Joint Research / Invited
• [Presentation] ナノギャップ電極と結合した単一自己組織化InSb量子ドットにおける電気伝導特性 (2016)
  • Author(s): 柴田憲治、大森雅登、榊裕之、平川一彦
  • Organizer: 応用物理学会
  • Place of Presentation: 朱鷺メッセ、新潟
  • Year and Date: 2016-09-15
• [Presentation] イオン液体を用いた金属量子ポイントコンタクトの伝導度の電界変調 (2016)
  • Author(s): 伊井貴彦、佐藤寛史、大宮司圭介、柴田憲治
  • Organizer: 平成28年度電気関係学会東北支部連合大会
  • Place of Presentation: 東北工業大学
  • Year and Date: 2016-08-31
• [Presentation] Electric-field tuning of conductance in metal quantum point contacts (2016)
  • Author(s): K. Shibata, K. Yoshida and K. Hirakawa
  • Organizer: International conference on superlattices, nanostructures and nanodevices (ICSNN2016)
  • Place of Presentation: Hong Kong, China
  • Year and Date: 2016-07-25
  • Int'l Joint Research
• [Presentation] 電気二重層ゲートを用いた金属量子ポイントコンタクトにおける伝導度の電界制御 (2016)
  • Author(s): 柴田憲治、吉田健治、平川一彦
  • Organizer: 日本物理学会 第71回年次大会
  • Place of Presentation: 東北学院大学
  • Year and Date: 2016-03-19
• [Presentation] 強磁性電極と結合した単一InAs量子ドットトランジスタにおける磁気抵抗効果 (2016)
  • Author(s): 早坂久輝、柴田憲治
  • Organizer: 平成28年東北地区若手研究者研究発表会
  • Place of Presentation: 日本大学工学部
  • Year and Date: 2016-03-01
• [Presentation] 量子ドットの付加による高移動度トランジスタの高機能化 (2016)
  • Author(s): 横川智志、渡辺達大、柴田憲治
  • Organizer: 平成28年東北地区若手研究者研究発表会
  • Place of Presentation: 日本大学工学部
  • Year and Date: 2016-03-01
• [Presentation] Terahertz single electron photovoltaic effect in self-assembled InAs quantum dots (2015)
  • Author(s): Y. Zhang, K. Shibata, N. Nagai, C. Ndebeka-Bandou, G. Bastard, and K. Hirakawa
  • Organizer: International Symposium on Advanced Nanodevices and Nanotechnology (ISANN2015)
  • Place of Presentation: Waikoloa, Hawaii
  • Year and Date: 2015-11-29
  • Int'l Joint Research
• [Presentation] Electric-field control of quantum states in nanostructures by electric-double-layer gating (2015)
  • Author(s): K. Shibata, K. Yoshida, and K. Hirakawa
  • Organizer: International Symposium on Advanced Nanodevices and Nanotechnology (ISANN2015)
  • Place of Presentation: Waikoloa, Hawaii
  • Year and Date: 2015-11-29
  • Int'l Joint Research
• [Presentation] 金属量子ポイントコンタクトにおける伝導度の電界制御 (2015)
  • Author(s): 柴田憲治、吉田健治、南谷俊樹、平川一彦
  • Organizer: 第76回応用物理学会秋季学術講演会
  • Place of Presentation: 名古屋国際会議場
  • Year and Date: 2015-09-13
• [Presentation] Electron magneto-tunneling through single self-assembled InAs quantum dashes coupled to ferromagnetic leads (2015)
  • Author(s): K. Shibata, N. Pascher, S. Schnez, T. Ihn, K. Ensslin, and K. Hirakawa
  • Organizer: 17th International Conference on Modulated Semiconductor Structures (MSS-17)
  • Place of Presentation: 仙台国際センター
  • Year and Date: 2015-07-26
  • Int'l Joint Research
• [Presentation] Carrier dynamics in InAs QD transistors under THz radiation (2015)
  • Author(s): K. Shibata
  • Organizer: Seminar presentation at Eidgenössische Technische Hochschule (ETH)
  • Place of Presentation: Zurich, Switzerland
  • Year and Date: 2015-07-03
  • Invited
• [Presentation] Electric-field control of conductance in metal point contacts by electric-double-layer gating (2015)
  • Author(s): K. Shibata, K. Yoshida, T. Minamiya, K. Sato, and K. Hirakawa
  • Organizer: The 19th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures (EDISON18)
  • Place of Presentation: Salamanca, Spain
  • Year and Date: 2015-06-29
  • Int'l Joint Research
• [Presentation] Terahertz spectroscopy of sublevel structures in single self-assembled InAs quantum dots (2015)
  • Author(s): Y. Zhang, K. Shibata, C. Ndebeka-Bandou, N. Nagai, K. Hirakawa
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 東海大学
  • Year and Date: 2015-03-11
  • Invited
• [Presentation] 単一InAs量子ドットを用いたトランジスタの特性評価 (2015)
  • Author(s): 大石善彦, 小野寺毅, 日野翼, 小野寺拓也, 今康幸, 柴田憲治
  • Organizer: 平成27年東北地区若手研究者研究発表会
  • Place of Presentation: 日本大学工学部
  • Year and Date: 2015-02-28
• [Presentation] Terahertz spectroscopy of single InAs quantum dots (2014)
  • Author(s): K. Hirakawa, Y. Zhang, K. Shibata, N. Nagai, C. Ndebeka-Bandou, G. Bastard
  • Organizer: The Fifth International Symposium on Terahertz Nanoscience (TeraNano V)
  • Place of Presentation: Martinique, France
  • Year and Date: 2014-12-01
  • Int'l Joint Research / Invited
• [Presentation] 単一InAs量子ドットトランジスタにおける物理現象の解明とデバイス応用 (2014)
  • Author(s): 柴田憲治
  • Organizer: 第八回関東光科学若手研究会
  • Place of Presentation: 明治大学
  • Year and Date: 2014-11-08
  • Invited
• [Presentation] Terahertz spectroscopy of sublevel structures in single self-assembled InAs quantum dots (2014)
  • Author(s): K. Hirakawa, Y. Zhang, K. Shibata, N. Nagai, C. Ndebeka-Bandou, G. Bastard
  • Organizer: The 7th International Symposium on Ultrafast Phenomena and Terahertz Waves (ISUPTW 2014)
  • Place of Presentation: Shanghai, China
  • Year and Date: 2014-10-13
  • Int'l Joint Research
• [Presentation] Terahertz intersublevel transitions in single self-assembled InAs quantum dots with variable electron numbers (2014)
  • Author(s): Y. Zhang、柴田憲治、長井奈緒美、C. Ndebeka-Bandou、G. Bastard、平川一彦
  • Organizer: 第75回応用物理学会秋季学術講演会
  • Place of Presentation: 北海道大学
  • Year and Date: 2014-09-17
• [Presentation] ナノギャップ電極・単一量子ドット接合系におけるゲート変調効果 (2014)
  • Author(s): 柴田憲治、平川一彦
  • Organizer: 第75回応用物理学会秋季学術講演会
  • Place of Presentation: 北海道大学
  • Year and Date: 2014-09-17
• [Presentation] Intersublevel transitions in single self-assembled InAs quantum dots (2014)
  • Author(s): Y. Zhang, K. Shibata, C. Ndebeka-Bandou, N. Nagai, K. Hirakawa
  • Organizer: 41st International Symposium on Compound Semiconductors (ISCS 2014)
  • Place of Presentation: Montpellier, France
  • Year and Date: 2014-05-11
  • Int'l Joint Research
• [Remarks] http://www.eis.tohtech.ac.jp/~kshibata/index.html
• [Remarks] 東北工業大学 柴田研究室 ホームページ
  • URL: http://www.eis.tohtech.ac.jp/~kshibata/index.html