Study on electronic correlation and photon-pair generation with highly symmetric quantum dots by droplet epitaxy

2013 Fiscal Year Final Research Report

• Project/Area Number: 23340090
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: National Institute for Materials Science
• Principal Investigator: SAKODA Kazuaki 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, ユニット長 (90250513)
• Co-Investigator(Renkei-kenkyūsha): KURODA Takashi 物質・材料研究機構, 先端フォトニクス材料ユニット, 主幹研究員 (00272659) ; MANO Takaaki 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)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Keywords: 液滴エピタキシー / 量子ドット / 電子相関 / 光子対 / 励起子複合体 / 有限要素法 / 配置間相互作用 / 微細構造分裂

Research Abstract

To clarify the electronic correlation of exciton complexes in lattice-matched quantum dots and to demonstrate the entangled photon-pair generation by cascade emission from their biexciton states, we performed self-assembly of quantum dots by droplet epitaxy, photon-correlation measurement by single-dot spectroscopy, and theoretical analysis of exciton states by the configuration interaction method. We succeeded in fabricating highly symmetric GaAs quantum dots on AlGaAs(111)A substrates by the droplet epitaxy and generating entangled photon pairs with the world highest fidelity of 86%. In addition, we extended the material system for the droplet epitaxy and succeeded in the fabrication of lattice-matched InAs quantum dots that have excitonic emission bands in the telecommunication wavelengths.

Research Products

• [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 Pages: 143106/1-4
  • DOI: 10.1063/1.4870839
  • Peer Reviewed
• [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 Pages: 3268/1-7
  • DOI: 10.1038/ncomms4268
  • Peer Reviewed
• [Journal Article] Exciton states of II-VI tetrapod-shaped nanocrystals (2013)
  • Author(s): Y. Yao, T. Kuroda, D. N. Dirin, A. Irkhina, R. B. Vasiliev, K. Sakoda
  • Journal Title: Optical Materials Express Volume: Vol. 3, No. 7 Pages: 977-988
  • DOI: 10.1364/OME.3.000977
  • Peer Reviewed
• [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 Pages: 041306(R)/1-5
  • DOI: 10.1103/PhysRevB.88.041306
  • Peer Reviewed
• [Journal Article] Self-limiting growth of hexagonal and triangular quantum dots on (111)A (2012)
  • Author(s): M. Jo, T. Mano, M. Abbarchi, T. Kuroda, Y. Sakuma, K. Sakoda
  • Journal Title: Crystal Growth & Design Volume: Vol. 12,No. 3 Pages: 1411-1415
  • DOI: 10.1021/cg201513m
  • Peer Reviewed
• [Journal Article] Extremely high-density GaAs quantum dots grown by droplet epitaxy (2012)
  • Author(s): M. Jo, T. Mano, Y. Sakuma, K. Sakoda
  • Journal Title: Applied Physics Letters Volume: Vol. 100 Pages: 212113/1-3
  • DOI: 10.1063/1.4721663
  • 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 Pages: 115330/1-4
  • DOI: 10.1103/PhysRevB.86.115330
  • Peer Reviewed
• [Journal Article] Exciton states of CdTe tetrapod-shaped nanocrystals (2011)
  • Author(s): K. Sakoda, Y. Yao, T. Kuroda, D. N. Dirin, R. B. Vasiliev
  • Journal Title: Opti -cal Materials Express Volume: Vol. 1, No. 2 Pages: 379-390
  • DOI: 10.1364/OME.1.000379
  • Peer Reviewed
• [Journal Article] Dark-bright mixing of interband transitions in symmet -ric semiconductor quantum dots (2011)
  • Author(s): G. Sallen, B. Urbaszek, M. M. Glazov, E. L. Ivchenko, T. Kuroda, T. Mano, S. Kunz, M. Abbarchi, K. Sakoda, D. Lagarde, A. Balocchi, X. Marie, T. Amand
  • Journal Title: Physical Review Letters Volume: Vol. 107 Pages: 166604/1-5
  • DOI: 10.1103/PhysRevLett.107.166604
  • Peer Reviewed
• [Presentation] Nanophotonics studies based on modern optics and materials science (2013)
  • Author(s): Kazuaki Sakoda
  • Organizer: International Workshop on Wave Functional Materials
  • Place of Presentation: 蘇州大学(中国・蘇州市)
  • Year and Date: 2013-11-09
• [Presentation] 液滴エピタキシー法による格子整合系量子ナノ構造の自己形成とその光物性 (2013)
  • Author(s): 間野高明, 定昌史, 黒田隆, 野田武司, 佐久間芳樹, 迫田和彰
  • Organizer: 第74回応用物理学会秋季学術講演会
  • Place of Presentation: 同志社大学(京都府京田辺市)
  • Year and Date: 2013-09-16
• [Presentation] Droplet epitaxy of nano -structures and their applications (2012)
  • Author(s): Takaaki Mano
  • Organizer: The 17th International Conference on Mole -cular Beam Epitaxy
  • Place of Presentation: 奈良新公会堂(奈良県奈良市)
  • Year and Date: 2012-09-23
• [Presentation] Recent developments of droplet epitaxy of GaAs quantum dots and their spectroscopic studies (2011)
  • Author(s): Kazuaki Sakoda
  • Organizer: The 5th OSA International Conference on Nanophotonics
  • Place of Presentation: 復旦大学(中国・上海市)
  • Year and Date: 2011-05-22
• [Presentation] Recent Development in Droplet Epitaxy (2011)
  • Author(s): Takaaki Mano
  • Organizer: The 7th International Conference on Low Dimensional Structure
  • Place of Presentation: Reef Hotel Telchac(メキシコ・テルチャックプエルト市)
  • Year and Date: 2011-05-22