Magnetic-field-enhanced quantum-cascade emission

被引：51

作者：

Ulrich, J ^{[1
]}

Zobl, R ^{[1
]}

Unterrainer, K ^{[1
]}

Strasser, G ^{[1
]}

Gornik, E ^{[1
]}

机构：

[1] Vienna Tech Univ, Inst Festkorperelekt, A-1040 Vienna, Austria

来源：

APPLIED PHYSICS LETTERS | 2000年 / 76卷 / 01期

关键词：

D O I：

10.1063/1.125642

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have observed an enhancement of terahertz intersubband electroluminescence in a quantum cascade structure in the presence of a magnetic field applied normal to the epitaxial layers. At a field of B = 7.2 T the emission efficiency doubles. This effect is attributed to the suppression of nonradiative Auger-intersubband transitions caused by Landau-quantization of the in-plane electron motion. The magnetic field dependence of the luminescence intensity shows strong oscillations. These magnetointersubband oscillations are caused by the modulation of the transition rate via resonant inter-Landau-level transfer. (C) 2000 American Institute of Physics. [S0003-6951(00)04201-7].

引用

页码：19 / 21

页数：3

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