Effect of a Phonon Bottleneck on Exciton and Spin Generation in Self-Assembled In1-xGaxAs Quantum Dots

被引：4
作者：
Huang, Y. Q. [1 ]
Buyanova, I. A. [1 ]
Yang, X. J. [3 ]
Murayama, A. [2 ]
Chen, W. M. [1 ]
机构：
[1] Linkoping Univ, Dept Phys Chem & Biol, S-58183 Linkoping, Sweden
[2] Hokkaido Univ, Grad Sch Informat Sci & Technol, Kita Ku, Kita 14,Nishi 9, Sapporo, Hokkaido 0600814, Japan
[3] Suzhou QiangMing Optoelect Co Ltd, Suzhou 215028, Jiangsu, Peoples R China
来源：
PHYSICAL REVIEW APPLIED | 2018年 / 9卷 / 04期
基金：
瑞典研究理事会; 日本学术振兴会;
关键词：
LIGHT-EMITTING-DIODES; ENERGY RELAXATION; OPTICAL PHONONS; POLARIZATION; SCATTERING; MECHANISM;
D O I：
10.1103/PhysRevApplied.9.044037
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We provide direct experimental evidence for the effect of a phonon bottleneck on exciton and spin generation in self-assembled In0.5Ga0.5As quantum dots (QDs). With the aid of tunable laser spectroscopy, we resolve and identify efficient exciton generation channels in the QDs mediated by longitudinal-optical (LO) phonons from an otherwise inhomogeneously broadened QD emission background that suffers from the phonon bottleneck effect in exciton generation. Spin-generation efficiency is found to be enhanced under the LO-assisted excitation condition due to suppressed spin relaxation accompanying accelerated exciton generation. These findings underline the importance of fine-tuning QD energy levels that will benefit potential spin-optoelectronic applications of QDs by reducing spin loss due to the phonon bottleneck.
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页数：9
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共 38 条
  • [1] MULTIDIMENSIONAL QUANTUM WELL LASER AND TEMPERATURE-DEPENDENCE OF ITS THRESHOLD CURRENT
    ARAKAWA, Y
    SAKAKI, H
    [J]. APPLIED PHYSICS LETTERS, 1982, 40 (11) : 939 - 941
  • [2] SINGLE-ELECTRON CAPACITANCE SPECTROSCOPY OF DISCRETE QUANTUM LEVELS
    ASHOORI, RC
    STORMER, HL
    WEINER, JS
    PFEIFFER, LN
    PEARTON, SJ
    BALDWIN, KW
    WEST, KW
    [J]. PHYSICAL REVIEW LETTERS, 1992, 68 (20) : 3088 - 3091
  • [3] Quantum-dot spin-state preparation with near-unity fidelity
    Atatüre, M
    Dreiser, J
    Badolato, A
    Högele, A
    Karrai, K
    Imamoglu, A
    [J]. SCIENCE, 2006, 312 (5773) : 551 - 553
  • [4] Quantum Spintronics: Engineering and Manipulating Atom-Like Spins in Semiconductors
    Awschalom, David D.
    Bassett, Lee C.
    Dzurak, Andrew S.
    Hu, Evelyn L.
    Petta, Jason R.
    [J]. SCIENCE, 2013, 339 (6124) : 1174 - 1179
  • [5] Identification of atomic-like electronic states in indium arsenide nanocrystal quantum dots
    Banin, U
    Cao, YW
    Katz, D
    Millo, O
    [J]. NATURE, 1999, 400 (6744) : 542 - 544
  • [6] Bechtold A, 2015, NAT PHYS, V11, P1005, DOI [10.1038/NPHYS3470, 10.1038/nphys3470]
  • [7] INTRINSIC MECHANISM FOR THE POOR LUMINESCENCE PROPERTIES OF QUANTUM-BOX SYSTEMS
    BENISTY, H
    SOTOMAYORTORRES, CM
    WEISBUCH, C
    [J]. PHYSICAL REVIEW B, 1991, 44 (19) : 10945 - 10948
  • [8] InGaAs-GaAs quantum-dot lasers
    Bimberg, D
    Kirstaedter, N
    Ledentsov, NN
    Alferov, ZI
    Kopev, PS
    Ustinov, VM
    [J]. IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, 1997, 3 (02) : 196 - 205
  • [9] Brillouin zone unfolding method for effective phonon spectra
    Boykin, Timothy B.
    Ajoy, Arvind
    Ilatikhameneh, Hesameddin
    Povolotskyi, Michael
    Klimeck, Gerhard
    [J]. PHYSICAL REVIEW B, 2014, 90 (20):
  • [10] Room temperature optical image storage devices based on novel photo-responsive chiral azobenzene liquid crystal dopants
    Chen, Si
    Chen, Yining
    Tong, Xiaoqian
    Wu, Bozhen
    Ma, Meng
    Shi, Yanqin
    Wang, Xu
    [J]. MATERIALS RESEARCH EXPRESS, 2016, 3 (11)
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