Far-Infrared Quantum Cascade Lasers Operating in the AlAs Phonon Reststrahlen Band

被引：34

作者：

Ohtani, Keita ^{[1
]}

Beck, Mattias ^{[1
]}

Suess, Martin Josef ^{[1
]}

Faist, Jerome ^{[1
]}

Andrews, Aaron Maxwell ^{[1
]}

Zederbauer, Tobias ^{[1
]}

Detz, Hermann ^{[1
]}

Schrenk, Werner ^{[1
]}

Strasser, Gottfried ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Inst Quantum Elect, Auguste Piccard Hof 1, CH-8093 Zurich, Switzerland

来源：

ACS PHOTONICS | 2016年 / 3卷 / 12期

关键词：

far-infrared; quantum cascade laser; reststrahlen band; optical phonon; terahertz; BEHAVIOR;

D O I：

10.1021/acsphotonics.6b00750

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report on the operation of a double metal waveguide far-infrared quantum cascade laser emitting at 28 mu m, corresponding to the AlAs-like phonon reststrahlen band. To avoid absorption by AlAs-like optical phonons, the Al-free group V alloy GaAs0.51Sb0.49 is used as a barrier layer in the bound-to continuum-based active region. Lasing occurs at a wavelength of 28.3 mu m, which is the longest wavelength among the quantum cascade lasers operating from mid-infrared to far-infrared. The threshold current density at 50 K is 5.5 kA/cm(2), and maximum operation temperature is 175 K. We also discuss the feasibility that the operation wavelength can cover the whole spectral range bridging between mid-infrared and terahertz by choosing properly suited group III-V materials.

引用

页码：2280 / 2284

页数：5

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