Ultralow threshold current terahertz quantum cascade lasers based on double-metal buried strip waveguides

被引：39

作者：

Dhillon, S ^{[1
]}

Alton, J

Barbieri, S

Sirtori, C

de Rossi, A

Calligaro, M

Beere, HE

Ritchie, D

机构：

[1] Thales Res & Technol, F-91404 Orsay, France

[2] Univ Paris 07, Paris, France

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

[4] Teraview Ltd, Cambridge CB4 0WS, England

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 07期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1063/1.2001159

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Terahertz (THz) quantum cascade lasers based on a buried cavity geometry are demonstrated by combining double-metal waveguides with proton implantation. Devices are realized with emission at 2.8 THz, displaying ultralow threshold currents of 19 mA (127 A/cm(2)) at 4 K in both pulsed and continuous wave operation. Owing to the semiconductor material on both sides of the active region and to the narrow width of the top metal strip, the thermal properties of these devices have been greatly improved. A decrease of the thermal resistance by over a factor of two compared to standard ridge double-metal lasers of similar size has been measured. (C) 2005 American Institute of Physics.

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页数：3

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