Study on energy-level fluctuation of two-level system in semiconductor nanostructures

• Project/Area Number: 24310084
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Nanostructural science
• Research Institution: Hokkaido University
• Principal Investigator: KUMANO HIDEKAZU 北海道大学, 電子科学研究所, 准教授 (70292042)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥20,280,000 (Direct Cost: ¥15,600,000、Indirect Cost: ¥4,680,000); Fiscal Year 2014: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000); Fiscal Year 2013: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000); Fiscal Year 2012: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
• Keywords: 量子ドット / 量子情報 / 量子光源 / 荷電状態制御 / 光子相関測定 / キャリアダイナミクス / 単一光子光源 / 半導体ナノ構造 / 単一量子ドット / 励起子 / 荷電状態 / 光子相関 / コヒーレンス

Outline of Final Research Achievements

I have fabricated single photon sources with a single InAs quantum dot (QD), and its carrier dynamics were investigated. Originally introduced metal microcolumnar structure have enhanced the photon extraction efficiency up to 18 % from conventionally obtained 1% with planar structure.
Charge states formed in the QD were modeled with 5-level system, and by comparing simulated time-evolution of the population with experimentally obtained correlation functions, I have successfully reproduced the carrier dynamics. This finding is crucial for controlling the carrier dynamics characterizing quantum photon sources.

Research Products

• [Journal Article] Subwavelength metallic cavities with high-Q resonance modes (2015)
  • Author(s): N. Ishihara, H. Kurosawa, T. Takemoto, N. A. Jahan, H. Nakajima, H. Kumano, and I. Suemune
  • Journal Title: Nanotechnology Volume: 26 Issue: 8 Pages: 085201-085201
  • DOI: 10.1088/0957-4484/26/8/085201
  • NAID: 120005697196
  • Peer Reviewed / Open Access
• [Journal Article] Vanishing fine structure splittings in telecom wavelength quantum dots grown on (111)A surfaces by droplet epitaxy (2014)
  • Author(s): X. Liu, N. Ha, H. Nakajima, T. Mano, T. Kuroda, B. Urbaszek, H. Kumano, I. Suemune, Y. Sakuma, and K. Sakoda
  • Journal Title: Phys. Rev. B Volume: 90 Issue: 8
  • DOI: 10.1103/physrevb.90.081301
  • Peer Reviewed / Open Access
• [Journal Article] Two-photon interference and coherent control of single InAs quantum dot emissions in an Ag-embedded structure (2014)
  • Author(s): X. Liu, H. Kumano, H. Nakajima, S. Odashima, T. Asano, T. Kuroda, and I. Suemune
  • Journal Title: J. Appl. Phys Volume: 116 Issue: 4
  • DOI: 10.1063/1.4891224
  • Peer Reviewed
• [Journal Article] Carrier-transfer dynamics between neutral and charged excitonic states in a single quantum dot probed with second-order photon correlation measurements (2013)
  • Author(s): 中島秀朗、熊野英和、飯島仁史、小田島聡、末宗幾夫
  • Journal Title: Physical Review B Volume: 88 Issue: 4
  • DOI: 10.1103/physrevb.88.045324
  • Peer Reviewed
• [Journal Article] Enhanced Photon Extraction from a Quantum Dot by a Silver Microcolumnar Photon Reflector (2013)
  • Author(s): 熊野英和、中島秀朗、飯島仁史、小田島聡, 松尾保孝、居城邦治、末宗幾夫
  • Journal Title: Applied Physicas Express Volume: 6 Issue: 6 Pages: 062801-062801
  • DOI: 10.7567/apex.6.062801
  • Peer Reviewed
• [Journal Article] “Bright Single-photon Source Based on an InAs Quantum Dot in a Silver-embedded Nanocone Structure” (2013)
  • Author(s): X. Liu, T. Asano, S. Odashima, H. Nakajima, H. Sasakura, H. Kumano, and I. Suemune
  • Journal Title: Appl. Phys. Lett. Volume: 102 Issue: 13 Pages: 131114-131114
  • DOI: 10.1063/1.4801334
  • Peer Reviewed
• [Journal Article] Fiber-Based Bidirectional Solid-State Single-Photon Emitter Based on Semiconductor Quantum Dot (2013)
  • Author(s): H. Sasakura, X. Liu, S. Odashima, H. Kumano, S. Muto, and I. Suemune
  • Journal Title: Appl. Phys. Express Volume: 6 Issue: 6 Pages: 065203-065203
  • DOI: 10.7567/apex.6.065203
  • NAID: 10031181989
  • Peer Reviewed
• [Journal Article] Anomalous dip observed in intensity autocorrelation function as an inherent nature of single-photon emitters (2012)
  • Author(s): 中島秀朗、 熊野英和、 飯島仁史、 末宗幾夫
  • Journal Title: Applied Physics Letters Volume: 101 Issue: 16 Pages: 161107-161107
  • DOI: 10.1063/1.4760222
  • Peer Reviewed
• [Presentation] Entangled and nonlocal biphoton generation from a semiconductor quantum dot (2015)
  • Author(s): H. Kumano, H. Nakajima, T. Kuroda, T. Mano, K. Sakoda, and I. Suemune
  • Organizer: Energy Materials Nanotechnology meeting 2015 (EMN Phuket)
  • Place of Presentation: Phuket (Thailand)
  • Year and Date: 2015-05-04 – 2015-05-07
  • Invited
• [Presentation] Nonlocal biphoton generation from as-grown semiconductor quantum dot (2014)
  • Author(s): H. Kumano, H. Nakajima, X. Liu, T. Kuroda, T. Mano, and I. Suemune
  • Organizer: 15th RIES-Hokudai International Symposium
  • Place of Presentation: 北海道大学 （北海道札幌市）
  • Year and Date: 2014-12-16 – 2014-12-17
• [Presentation] Semiconductor-Quantum-Dot-Based Photon Sources for Quantum Communication (2014)
  • Author(s): H. Kumano
  • Organizer: HOKUDAI-NCTU Joint Symposium on Nano, Photo and Bio Sciences
  • Place of Presentation: 北海道大学 （北海道札幌市）
  • Year and Date: 2014-09-10 – 2014-09-11
  • Invited
• [Presentation] Postselection-free Entangled Photons from Highly Symmetric Quantum Dots Grown by Droplet Epitaxy (2014)
  • Author(s): T. Kuroda, T. Mano, K. Sakoda, B. Urbaszek, X. Marie, T. Amand, H. Nakajima, H. Kumano, and I. Suemune
  • Organizer: SPIE Nanoscience + Engineering
  • Place of Presentation: San Diego, CA (USA)
  • Year and Date: 2014-08-17 – 2014-08-21
  • Invited
• [Presentation] Metallic Semiconductor Nanostructures for Photonic Applications (2014)
  • Author(s): H. Kumano, H. Kurosawa, X. Liu, H. Nakajima, S. Odashima, and I. Suemune
  • Organizer: International Conference on Metamaterials and Nanophysics
  • Place of Presentation: Varadero (Cuba)
  • Year and Date: 2014-04-22 – 2014-05-01
  • Invited
• [Presentation] Semiconductor Quantum Dots and Their Metal-embedded Nanostructures (2013)
  • Author(s): H. Kumano, X. Liu, H. Nakajima, S. Odashima, and I. Suemune
  • Organizer: Energy Materials Nanotechnology (EMN2013)
  • Place of Presentation: Homeland Hotel, Chengudu, China
  • Invited
• [Presentation] Semiconductor Photon Sources of Single Photons and Entangled Photon Pairs for Quantum Information and Communication (2013)
  • Author(s): H. Kumano, H. Nakajima, T. Kuroda, T. Mano, K. Akahane, M. Sasaki and I. Suemune
  • Organizer: Quantum Science Symposium Asia-2013
  • Place of Presentation: Sanjo Conference Hall, Tokyo, Japan
  • Invited
• [Presentation] Improvement of semiconductor-based quantum emitter achieved by a metal embedded nanocone structure (2013)
  • Author(s): H. Kumano, H. Nakajima, T. Kuroda, T. Mano, K. Akahane, M. Sasaki and I. Suemune
  • Organizer: 14th RIES-Hokudai International Symposium
  • Place of Presentation: Chateraise Gateaux Kingdom, Sapporo, Japan
• [Presentation] Evaluating charge-transfer rate in a quantum dot based on single photon correlation measurements (2012)
  • Author(s): H. Kumano, et al.
  • Organizer: 13th RIES-Hokudai international Symposium
  • Place of Presentation: 北海道大学(札幌市)
• [Presentation] General photon autocorrelation function including carrier repopulation process in single-photon emitters (2012)
  • Author(s): H. Nakajima, et al.
  • Organizer: 39th International Symposium on Compound Semiconductors
  • Place of Presentation: カリフォルニア工科大学 (アメリカ)
• [Presentation] Charging and discharging of neutral exciton state in a single quantum dot selectively excited quasi-resonant excitation (2012)
  • Author(s): H. Nakajima, et al.
  • Organizer: 31st International conference on the Physics of Semiconductors (ICPS 2012)
  • Place of Presentation: ETH Zurich (スイス).
• [Presentation] Fiber-based bidirectional extraction from a single photon emitter (2012)
  • Author(s): H. Sasakura, et al.
  • Organizer: 13th RIES-Hokudai international Symposium
  • Place of Presentation: 北海道大学(札幌市)