Exciton spin dynamics in GaSe

Yanhao Tang; Wei Xie; Krishna C. Mandal; John A. McGuire; Chih Wei Lai

doi:10.1063/1.4930809

Exciton spin dynamics in GaSe

Yanhao Tang
, Wei Xie
, Krishna C. Mandal
, John A. McGuire
, Chih Wei Lai

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

13 Scopus citations

Abstract

We analyze exciton spin dynamics in GaSe under nonresonant circularly polarized optical pumping with an exciton spin-flip rate-equation model. The model reproduces polarized time-dependent photoluminescence measurements in which the initial circular polarization approaches unity even when pumping with 0.15 eV excess energy. At T = 10 K, the exciton spin relaxation exhibits a biexponential decay with sub-20 ps and >500 ps time constants, which are also reproduced by the rate-equation model assuming distinct spin-relaxation rates for hot (nonequilibrium) and cold band-edge excitons.

Original language	English
Article number	113103
Journal	Journal of Applied Physics
Volume	118
Issue number	11
DOIs	https://doi.org/10.1063/1.4930809
State	Published - 21 Sep 2015
Externally published	Yes

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title = "Exciton spin dynamics in GaSe",

abstract = "We analyze exciton spin dynamics in GaSe under nonresonant circularly polarized optical pumping with an exciton spin-flip rate-equation model. The model reproduces polarized time-dependent photoluminescence measurements in which the initial circular polarization approaches unity even when pumping with 0.15 eV excess energy. At T = 10 K, the exciton spin relaxation exhibits a biexponential decay with sub-20 ps and >500 ps time constants, which are also reproduced by the rate-equation model assuming distinct spin-relaxation rates for hot (nonequilibrium) and cold band-edge excitons.",

author = "Yanhao Tang and Wei Xie and Mandal, \{Krishna C.\} and McGuire, \{John A.\} and Lai, \{Chih Wei\}",

note = "Publisher Copyright: {\textcopyright} 2015 AIP Publishing LLC.",

year = "2015",

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day = "21",

doi = "10.1063/1.4930809",

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T1 - Exciton spin dynamics in GaSe

AU - Tang, Yanhao

AU - Xie, Wei

AU - Mandal, Krishna C.

AU - McGuire, John A.

AU - Lai, Chih Wei

PY - 2015/9/21

Y1 - 2015/9/21

N2 - We analyze exciton spin dynamics in GaSe under nonresonant circularly polarized optical pumping with an exciton spin-flip rate-equation model. The model reproduces polarized time-dependent photoluminescence measurements in which the initial circular polarization approaches unity even when pumping with 0.15 eV excess energy. At T = 10 K, the exciton spin relaxation exhibits a biexponential decay with sub-20 ps and >500 ps time constants, which are also reproduced by the rate-equation model assuming distinct spin-relaxation rates for hot (nonequilibrium) and cold band-edge excitons.

AB - We analyze exciton spin dynamics in GaSe under nonresonant circularly polarized optical pumping with an exciton spin-flip rate-equation model. The model reproduces polarized time-dependent photoluminescence measurements in which the initial circular polarization approaches unity even when pumping with 0.15 eV excess energy. At T = 10 K, the exciton spin relaxation exhibits a biexponential decay with sub-20 ps and >500 ps time constants, which are also reproduced by the rate-equation model assuming distinct spin-relaxation rates for hot (nonequilibrium) and cold band-edge excitons.

UR - https://www.scopus.com/pages/publications/84942436887

U2 - 10.1063/1.4930809

DO - 10.1063/1.4930809

M3 - 文章

AN - SCOPUS:84942436887

SN - 0021-8979

VL - 118

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 11

M1 - 113103

ER -

Exciton spin dynamics in GaSe

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