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首页> 外文期刊>Applied Physics Letters >Exciton spin relaxation in InAs/InGaAlAs/InP(001) quantum dashes emitting near 1.55μm
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Exciton spin relaxation in InAs/InGaAlAs/InP(001) quantum dashes emitting near 1.55μm

机译：InAs / InGaAlAs / InP（001）量子破折号中的激子自旋弛豫发射近1.55μm

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摘要

Exciton spin and related optical polarization in self-assembled InAs/In_(0.53)Ga_(0.23)Al_(0.24)4As/InP(001) quantum dashes emitting at 1.55 μm are investigated by means of polarization- and time-resolved photoluminescence, as well as photoluminescence excitation spectroscopy, at cryogenic temperature. We investigate the influence of highly non-resonant and quasi-resonant optical spin pumping conditions on spin polarization and spin memory of the quantum dash ground state. We show that a spin pumping scheme, utilizing the longitudinal-optical-phonon-mediated coherent scattering process, can lead to the polarization degree above 50%. We discuss the role of intrinsic asymmetries in the quantum dash that influence values of the degree of polarization and its time evolution.
机译：通过极化和时间分辨的光致发光研究了自组装的InAs / In_（0.53）Ga_（0.23）Al_（0.24）4As / InP（001）在1.55μm处发射的量子虚线中的激子自旋和相关的光偏振以及在低温下的光致发光激发光谱。我们研究了高非共振和准共振光学自旋泵浦条件对量子破折号基态的自旋极化和自旋记忆的影响。我们表明，利用纵向光学声子介导的相干散射过程的自旋泵浦方案可以导致偏振度超过50％。我们讨论了量子破折号中固有不对称性的作用，该不对称性影响极化程度及其时间演化的值。

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  • 来源
    《Applied Physics Letters》 |2016年第19期|193108.1-193108.4|共4页
  • 作者

    M. Syperek; L. Dusanowski; M. Gawelczyk; G. Sek; A. Somers; J. P. Reithmaier; S. Hoefling; J. Misiewicz;

  • 作者单位

    Laboratory for Optical Spectroscopy of Nanostructures, Department of Experimental Physics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27,50-370 Wroclaw, Poland;

    Laboratory for Optical Spectroscopy of Nanostructures, Department of Experimental Physics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27,50-370 Wroclaw, Poland;

    Laboratory for Optical Spectroscopy of Nanostructures, Department of Experimental Physics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27,50-370 Wroclaw, Poland,Department of Theoretical Physics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27,50-370 Wroclaw, Poland;

    Laboratory for Optical Spectroscopy of Nanostructures, Department of Experimental Physics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27,50-370 Wroclaw, Poland;

    Technische Physik, University of Wuerzburg and Wilhelm-Conrad-Roentgen-Research Center for Complex Material Systems, Am Hubland, D-97074 Wuerzburg, Germany;

    Technische Physik, University of Wuerzburg and Wilhelm-Conrad-Roentgen-Research Center for Complex Material Systems, Am Hubland, D-97074 Wuerzburg, Germany,Institute of Nanostructure Technologies and Analytics (INA), CINSaT, University of Kassel, Heinrich-Plett-Str. 40,34132 Kassel, Germany;

    Technische Physik, University of Wuerzburg and Wilhelm-Conrad-Roentgen-Research Center for Complex Material Systems, Am Hubland, D-97074 Wuerzburg, Germany,SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, KY16 9SS St. Andrews, United Kingdom;

    Laboratory for Optical Spectroscopy of Nanostructures, Department of Experimental Physics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27,50-370 Wroclaw, Poland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 入库时间 2022-08-18 03:14:55

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