Study on the spin relaxation of charge carriers in semiconductor quantum dots by photon fluctuation measurement

• Project/Area Number: 24510145
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nanostructural science
• Research Institution: National Institute for Materials Science
• Principal Investigator: KURODA Takashi 独立行政法人物質・材料研究機構, 先端フォトニクス材料ユニット, 主席研究員 (00272659)
• Co-Investigator(Renkei-kenkyūsha): MANO Takaaki 独立行政法人物質・材料研究機構, 先端フォトニクス材料ユニット, 主任研究員 (60391215)
• Research Collaborator: BERNHARD Urbaszek Université de Toulouse ; XAVIER Marie Université de Toulouse ; THIERRY Amand Université de Toulouse ; CHENG Shun-Jen National Chiao Tung University ; HA Neul 独立行政法人物質・材料研究機構, ポスドク ; LIU Xiangming 独立行政法人物質・材料研究機構, ポスドク
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 量子ドット

Outline of Final Research Achievements

The polarization state of photons emitted from a single quantum dot depends on the spin state of charge carriers existing in the dot. Thus, the fluctuation of photon polarization is expected to reveal the spin relaxation of charge carriers. Here we develop a new spectroscopy technique based on photon polarization correlations, and explore the charge spin relaxation with extended time scales.

Research Products

• [Journal Article] Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field (2014)
  • Author(s): G. Sallen, S. Kunz, T. Amand, L. Bouet, T. Kuroda, T. Mano, D. Paget, O. Krebs, X. Marie, K. Sakoda, B. Urbaszek
  • Journal Title: Nature Communications Volume: Vol. 5 Issue: 1
  • DOI: 10.1038/ncomms4268
  • Peer Reviewed
• [Journal Article] Droplet epitaxial growth of highly symmetric quantum dots emitting at telecommuni -cation wavelengths on InP (111)A (2014)
  • Author(s): N. Ha, X. Liu, T. Mano, T. Kuroda, K. Mitsuishi, A. Castellano, S. Sanguinetti, T. Noda, Y. Sakuma, K. Sakoda
  • Journal Title: Applied Physics Letters Volume: Vol. 104 Issue: 14 Pages: 143106-143106
  • DOI: 10.1063/1.4870839
  • Peer Reviewed
• [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] Symmetric quantum dots as efficient sources of highly entangled photons : Violation of Bell ' s inequality without spectral and temporal filtering (2013)
  • Author(s): T. Kuroda, T. Mano, N. Ha, H. Nakajima, H Kumano, B. Urbaszek, M. Jo, M. Abbarachi, Y. Sakuma, K. Sakoda, I Suemune, X. Marie, T. Amand
  • Journal Title: Physical Review B Volume: Vol. 88 Issue: 4
  • DOI: 10.1103/physrevb.88.041306
  • Peer Reviewed
• [Journal Article] Magnetic field induced valence band mixing in [111] grown semiconductor quantum dots (2013)
  • Author(s): M. V. Durnev
  • Journal Title: Physical Review B Volume: 87 Issue: 8
  • DOI: 10.1103/physrevb.87.085315
  • Peer Reviewed
• [Journal Article] Geometrical impact on the optical polarization of droplet epitaxial quantum dots (2012)
  • Author(s): Yu-Huai Liao
  • Journal Title: Physical Review B Volume: 86 Issue: 11
  • DOI: 10.1103/physrevb.86.115323
  • Peer Reviewed
• [Journal Article] Bunched photon statistics of the spectrally diffusive photoluminescence of single self-assemb -led GaAs quantum dots (2012)
  • Author(s): M. Abbarchi, T. Kuroda, T. Mano, M. Gurioli, K. Sakoda
  • Journal Title: Physical Review B Volume: Vol. 86 Issue: 11
  • DOI: 10.1103/physrevb.86.115330
  • Peer Reviewed
• [Presentation] 量子ドットもつれ光子源 (2015)
  • Author(s): 黒田隆
  • Organizer: 2015年度精密工学会春期大会学術講演会シンポジウム
  • Place of Presentation: 東洋大学
  • Year and Date: 2015-03-17 – 2015-03-19
  • Invited
• [Presentation] Postselection-free entangled photons from highly symmetric quantum dots grown by droplet epitaxy (2014)
  • Author(s): T. Kuroda
  • Organizer: SPIE Optics+Photonics 2014
  • Place of Presentation: San Diego Convention Center
  • Year and Date: 2014-08-17 – 2014-08-21
  • Invited
• [Presentation] 半導体量子ドットを用いた量子もつれ光子対の発生 (2013)
  • Author(s): 黒田隆
  • Organizer: レーザ・量子エレクトロニクス研究会
  • Place of Presentation: 金沢
  • Invited