Terahertz microcavity quantum-cascade lasers

被引：47
|
作者：
Fasching, G
Benz, A
Unterrainer, K
Zobl, R
Andrews, AM
Roch, T
Schrenk, W
Strasser, G
机构：
[1] Vienna Tech Univ, Inst Photon, A-1040 Vienna, Austria
[2] Vienna Tech Univ, Ctr Micro & Nanostruct, A-1040 Vienna, Austria
[3] Vienna Tech Univ, Inst Solid State Elect, A-1040 Vienna, Austria
来源：
APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 21期
基金：
奥地利科学基金会;
关键词：
D O I：
10.1063/1.2136222
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We demonstrate circular-shaped microcavity quantum-cascade lasers emitting in the THz region between 3.0 and 3.8 THz. The band structure design of the GaAs/Al0.15Ga0.85As heterostructure is based on longitudinal-optical phonon scattering for depopulation of the lower radiative state. A double metal waveguide is used to confine the whispering gallery modes in the gain medium. The threshold current density is 900 A/cm(2) at 5 K. Lasing takes place in pulsed-mode operation up to a heat-sink temperature of 140 K. (c) 2005 American Institute of Physics.
引用
收藏
页码：1 / 3
页数：3
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