Terahertz-electroluminescence in a quantum cascade structure

被引：26

作者：

Ulrich, J ^{[1
]}

Zobl, R ^{[1
]}

Finger, N ^{[1
]}

Unterrainer, K ^{[1
]}

Strasser, G ^{[1
]}

Gornik, E ^{[1
]}

机构：

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

来源：

PHYSICA B | 1999年 / 272卷 / 1-4期

基金：

奥地利科学基金会;

关键词：

terahertz; far-infrared; electroluminescence; quantum cascade structure;

D O I：

10.1016/S0921-4526(99)00273-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report on spontaneous terahertz emission from a quantum cascade structure, based on carrier injection into the excited state of a 26 nm quantum well. We have measured luminescence at a photon energy of 17.3 meV with a full line-width at half-maximum of 1.3 meV. Comparing the outcoupling efficiency from differently processed samples, we observe a higher signal from the edge emission of ridges than from grating coupled surface emission. The spectroscopy on cleaved facet waveguide resonator samples grown on a semi-insulating substrate reveals a significant reduction of absorption in the substrate. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：216 / 218

页数：3

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