Microcavity THz quantum cascade laser

被引：6
|
作者：
Fasching, G [1 ]
Benz, A
Zobl, R
Andrews, AM
Roch, T
Schrenk, W
Strasser, G
Tamosiunas, V
Unterrainer, K
机构：
[1] Vienna Univ Technol, Inst Photon, A-1040 Vienna, Austria
[2] Vienna Univ Technol, Ctr Micro & Nanostruct, A-1040 Vienna, Austria
[3] Vienna Univ Technol, Inst Solid State Elect, A-1040 Vienna, Austria
[4] Vienna Univ Technol, Ctr Micro & Nanostruct, A-1040 Vienna, Austria
[5] Inst Semicond Phys, LT-01108 Vilnius, Lithuania
[6] Vilnius Gediminas Tech Univ, LT-10223 Vilnius, Lithuania
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2006年 / 32卷 / 1-2期
基金：
奥地利科学基金会;
关键词：
far-infrared quantum cascade lasers; intersubband transitions; microcavities;
D O I：
10.1016/j.physe.2005.12.073
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We report operation of disk and ring shaped terahertz (THz) quantum-cascade lasers (QCLs) emitting in the THz region between 3.0 and 3.4 THz. 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 900A/cm(2) at 5 K. 3D Finite-Difference Time-Domain (FDTD) simulations were performed to obtain the field distributions within a THz QCl resonator at different frequencies. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：316 / 319
页数：4
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