Spatially resolved and time-resolved imaging of transport of indirect excitons in high magnetic fields

被引：6

作者：

Dorow, C. J. ^{[1
]}

Hasling, M. W. ^{[1
]}

Calman, E. V. ^{[1
]}

Butov, L. V. ^{[1
]}

Wilkes, J. ^{[2
]}

Campman, K. L. ^{[3
]}

Gossard, A. C. ^{[3
]}

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[2] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales

[3] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW B | 2017年 / 95卷 / 23期

基金：

英国工程与自然科学研究理事会; 美国国家科学基金会;

关键词：

COUPLED QUANTUM-WELLS; SEPARATED ELECTRON; HOLE LAYERS; MAGNETOEXCITONS; CONDENSATE; GAS; TRANSISTOR; SIGNATURE; SYSTEMS; TRAPS;

D O I：

10.1103/PhysRevB.95.235308

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present the direct measurements of magnetoexciton transport. Excitons give the opportunity to realize the high magnetic-field regime for composite bosons with magnetic fields of a few tesla. Long lifetimes of indirect excitons allow the study of kinetics of magnetoexciton transport with time-resolved optical imaging of exciton photoluminescence. We performed spatially, spectrally, and time-resolved optical imaging of transport of indirect excitons in high magnetic fields. We observed that an increasing magnetic field slows down magnetoexciton transport. The time-resolved measurements of the magnetoexciton transport distance allowed for an experimental estimation of the magnetoexciton diffusion coefficient. An enhancement of the exciton photoluminescence energy at the laser excitation spot was found to anticorrelate with the exciton transport distance. A theoretical model of indirect magnetoexciton transport is presented and is in agreement with the experimental data.

引用

页数：7

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