Exciton spin relaxation in InAs/InGaAlAs/InP(001) quantum dashes emitting near 1.55 μm

M. Syperek; Ł. Dusanowski; M. Gawełczyk; G. Sęk; A. Somers; J. P. Reithmaier; S. Höfling; J. Misiewicz

doi:10.1063/1.4966997

Exciton spin relaxation in InAs/InGaAlAs/InP(001) quantum dashes emitting near 1.55 μm

M. Syperek
, Ł. Dusanowski
, M. Gawełczyk
, G. Sęk
, A. Somers
, J. P. Reithmaier
, S. Höfling
, J. Misiewicz

Research output: Contribution to journal › Article › peer-review

Abstract

Exciton spin and related optical polarization in self-assembled InAs/In_0.53Ga_0.23Al_0.24As/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.

Original language	English
Article number	193108
Number of pages	5
Journal	Applied Physics Letters
Volume	109
Issue number	19
DOIs	https://doi.org/10.1063/1.4966997
Publication status	Published - 7 Nov 2016

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Hoefling_2016_APL_ExcitonSpinRelaxation_AAM
Copyright © 2016, the Author(s). Published by AIP Publishing. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1063/1.4966997
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@article{ad64b391db3b4e569adcda98cf2d7a95,

title = "Exciton spin relaxation in InAs/InGaAlAs/InP(001) quantum dashes emitting near 1.55 μm",

abstract = "Exciton spin and related optical polarization in self-assembled InAs/In0.53Ga0.23Al0.24As/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.",

author = "M. Syperek and {\L}. Dusanowski and M. Gawe{\l}czyk and G. S{\c e}k and A. Somers and Reithmaier, \{J. P.\} and S. H{\"o}fling and J. Misiewicz",

note = "This research was supported by The National Science Center Grant MAESTRO No. 2011/02/A/ST3/00152. {\L}. D. acknowledges the financial support from the Foundation for Polish Science within the START fellowship.",

year = "2016",

month = nov,

day = "7",

doi = "10.1063/1.4966997",

language = "English",

volume = "109",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "19",

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TY - JOUR

T1 - Exciton spin relaxation in InAs/InGaAlAs/InP(001) quantum dashes emitting near 1.55 μm

AU - Syperek, M.

AU - Dusanowski, Ł.

AU - Gawełczyk, M.

AU - Sęk, G.

AU - Somers, A.

AU - Reithmaier, J. P.

AU - Höfling, S.

AU - Misiewicz, J.

N1 - This research was supported by The National Science Center Grant MAESTRO No. 2011/02/A/ST3/00152. Ł. D. acknowledges the financial support from the Foundation for Polish Science within the START fellowship.

PY - 2016/11/7

Y1 - 2016/11/7

N2 - Exciton spin and related optical polarization in self-assembled InAs/In0.53Ga0.23Al0.24As/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.

AB - Exciton spin and related optical polarization in self-assembled InAs/In0.53Ga0.23Al0.24As/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.

U2 - 10.1063/1.4966997

DO - 10.1063/1.4966997

M3 - Article

AN - SCOPUS:84994797669

SN - 0003-6951

VL - 109

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 19

M1 - 193108

ER -

Exciton spin relaxation in InAs/InGaAlAs/InP(001) quantum dashes emitting near 1.55 μm

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