Terahertz ambipolar dual-wavelength quantum cascade laser

被引：15

作者：

Lever, L. ^{[1
]}

Hinchcliffe, N. M. ^{[1
]}

Khanna, S. P. ^{[1
]}

Dean, P. ^{[1
]}

Ikonic, Z. ^{[1
]}

Evans, C. A. ^{[1
]}

Davies, A. G. ^{[1
]}

Harrison, P. ^{[1
]}

Linfield, E. H. ^{[1
]}

Kelsall, R. W. ^{[1
]}

机构：

[1] Univ Leeds, Sch Elect & Elect Engn, Inst Microwaves & Photon, Leeds LS2 9JT, W Yorkshire, England

来源：

OPTICS EXPRESS | 2009年 / 17卷 / 22期

基金：

英国工程与自然科学研究理事会;

关键词：

WAVE-GUIDES; TEMPERATURE; SCATTERING;

D O I：

10.1364/OE.17.019926

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Terahertz frequency quantum cascade lasers (THz QCLs) are compact solid-state sources of terahertz radiation that were first demonstrated in 2002. They have a broad range of potential applications ranging from gas sensing and non-destructive testing, through to security and medical imaging, with many polycrystalline compounds having distinct fingerprint spectra in the terahertz frequency range. In this article, we demonstrate an electrically-switchable dual-wavelength THz QCL which will enable spectroscopic information to be obtained within a THz QCL-based imaging system. The device uses the same active region for both emission wavelengths: in forward bias, the laser emits at 2.3 THz; in reverse bias, it emits at 4 THz. The corresponding threshold current densities are 490 A/cm(2) and 330 A/cm(2), respectively, with maximum operating temperatures of 98 K and 120 K. (C) 2009 Optical Society of America

引用

页码：19926 / 19932

页数：7

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