Microdisk THz quantum-cascade lasers with super-conducting cavities

被引：0

作者：

Benz, A. ^{[1
]}

Brandstetter, M. ^{[1
]}

Deutsch, C. ^{[1
]}

Fasching, G. ^{[1
]}

Andrews, A. M. ^{[2
,3
]}

Klang, P. ^{[2
,3
]}

Schrenk, W. ^{[2
,3
]}

Strasser, G. ^{[2
,3
]}

Unterrainer, K. ^{[1
]}

机构：

[1] Vienna Univ Technol, Photon Inst, Gusshausstr 29-387, A-1010 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：

TERAHERTZ EMITTERS, RECEIVERS, AND APPLICATIONS | 2010年 / 7763卷

关键词：

Terahertz; quantum-cascade laser; superconducting; microdisk; THERMAL-CONDUCTIVITY;

D O I：

10.1117/12.860475

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a new waveguide concept for terahertz quantum-cascade laser. The double-metal waveguide confines the active region between two metallic layers. Thereby, a modal confinement of almost 100 % is achieved. However, these metal layers are also one of the dominating loss mechanisms. Replacing the conventional metal with a superconductor helps to reduce the total losses. A surface plasmon is formed at the interface between the superconductor and the semiconductor. It can be maintained even for photon energies above the superconducting band gap. In this work we use niobium with a band gap of 2.8 meV to confine the active region of a THz-QCL emitting at 9 meV.

引用

页数：7

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