Gain and losses in THz quantum cascade laser with metal-metal waveguide

被引：40
|
作者：
Martl, Michael [1 ]
Darmo, Juraj [1 ]
Deutsch, Christoph [1 ]
Brandstetter, Martin [1 ]
Andrews, Aaron Maxwell [2 ]
Klang, Pavel [3 ]
Strasser, Gottfried [2 ]
Unterrainer, Karl [1 ,3 ]
机构：
[1] Vienna Univ Technol, Photon Inst, A-1040 Vienna, Austria
[2] Vienna Univ Technol, Inst Solid State Elect, A-1040 Vienna, Austria
[3] Vienna Univ Technol, Ctr Micro & Nanostruct, A-1040 Vienna, Austria
来源：
OPTICS EXPRESS | 2011年 / 19卷 / 02期
基金：
奥地利科学基金会;
关键词：
16;
D O I：
10.1364/OE.19.000733
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Coupling of broadband terahertz pulses into metal-metal terahertz quantum cascade lasers is presented. Mode matched terahertz transients are generated on the quantum cascade laser facet of subwavelength dimension. This method provides a full overlap of optical mode and active laser medium. A longitudinal optical-phonon depletion based active region design is investigated in a coupled cavity configuration. Modulation experiments reveal spectral gain and (broadband) losses. The observed gain shows high dynamic behavior when switching from loss to gain around threshold and is clamped at total laser losses. (C)2011 Optical Society of America
引用
收藏
页码：733 / 738
页数：6
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