Single-mode operation of terahertz quantum cascade lasers with distributed feedback resonators

被引：63

作者：

Mahler, L

Köhler, R

Tredicucci, A

Beltram, F

Beere, HE

Linfield, EH

Ritchie, DA

Davies, AG

机构：

[1] INFM, NEST, I-56126 Pisa, Italy

[2] Scuola Normale Super Pisa, I-56126 Pisa, Italy

[3] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[4] Univ Leeds, Sch Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, England

[5] ETH, Dept Phys, CH-8093 Zurich, Switzerland

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 26期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1063/1.1767957

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Distributed feedback terahertz quantum-cascade lasers emitting at 4.34 and 4.43 THz are presented. Mode selection is based on a complex-coupling scheme implemented into the top-contact layer by a combination of wet chemical etching and ohmic-contact deposition. Single-mode emission stable at all injection currents and operating temperatures is shown, with a side-mode suppression ratio exceeding 20 dB. Peak output powers of up to 1.8 mW are obtained at low temperatures. (C) 2004 American Institute of Physics.

引用

页码：5446 / 5448

页数：3

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