Exciton spin dynamics in GaSe

被引：12

作者：

Tang, Yanhao ^{[1
]}

Xie, Wei ^{[1
]}

Mandal, Krishna C. ^{[2
]}

McGuire, John A. ^{[1
]}

Lai, Chih Wei ^{[1
]}

机构：

[1] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[2] Univ S Carolina, Dept Elect Engn, Columbia, SC 29208 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2015年 / 118卷 / 11期

基金：

美国国家科学基金会;

关键词：

GAAS QUANTUM-WELLS; EPSILON-GASE; RADIATIVE LIFETIMES; LATTICE-RELAXATION; OPTICAL-PROPERTIES; GALLIUM-ARSENIDE; SEMICONDUCTORS; ELECTRONS; CRYSTALS; ELECTROREFLECTANCE;

D O I：

10.1063/1.4930809

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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. (C) 2015 AIP Publishing LLC.

引用

页数：8

共 67 条

[1] TIME-RESOLVED STUDIES OF EXCITONIC POLARITONS [J].

AAVIKSOO, J .

JOURNAL OF LUMINESCENCE, 1991, 48-9 :57-66

[2] OPTICAL-CONSTANTS OF EPSILON-GASE [J].

ADACHI, S ;

SHINDO, Y .

JOURNAL OF APPLIED PHYSICS, 1992, 71 (01) :428-431

[3] Spin relaxation in polarized interacting exciton gas in quantum wells [J].

Amand, T ;

Robart, D ;

Marie, X ;

Brousseau, M ;

LeJeune, P ;

Barrau, J .

PHYSICAL REVIEW B, 1997, 55 (15) :9880-9896

[4]

Amand T, 2008, SPRINGER SER SOLID-S, V157, P55, DOI 10.1007/978-3-540-78820-1_3

[5] EXCITON FORMATION AND HOLE-SPIN RELAXATION IN INTRINSIC QUANTUM-WELLS [J].

AMAND, T ;

DAREYS, B ;

BAYLAC, B ;

MARIE, X ;

BARRAU, J ;

BROUSSEAU, M ;

DUNSTAN, DJ ;

PLANEL, R .

PHYSICAL REVIEW B, 1994, 50 (16) :11624-11628

[6]

[Anonymous], 1991, PHYS REV B, V44, P5923

[7]

Aronov AG., 1983, Sov. Phys. JETP, V57, P680

[8] INDIRECT ENERGY GAP IN GASE AND GAS [J].

AULICH, E ;

BREBNER, JL ;

MOOSER, E .

PHYSICA STATUS SOLIDI, 1969, 31 (01) :129-&

[9] Quantum Spintronics: Engineering and Manipulating Atom-Like Spins in Semiconductors [J].

Awschalom, David D. ;

Bassett, Lee C. ;

Dzurak, Andrew S. ;

Hu, Evelyn L. ;

Petta, Jason R. .

SCIENCE, 2013, 339 (6124) :1174-1179

[10] EXCITON SPIN RELAXATION IN THE 2D DENSE EXCITONIC PHASE - THE ROLE OF EXCHANGE INTERACTION [J].

BAYLAC, B ;

AMAND, T ;

BROUSSEAU, M ;

MARIE, X ;

DAREYS, B ;

BACQUET, G ;

BARRAU, J ;

PLANEL, R .

SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 1995, 10 (03) :295-301

← 1 2 3 4 5 6 7 →