1.9 THz quantum-cascade lasers with one-well injector

被引：87

作者：

Kumar, S

Williams, BS

Hu, Q

Reno, JL

机构：

[1] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

[2] MIT, Elect Res Lab, Cambridge, MA 02139 USA

[3] Sandia Natl Labs, Dept 1123, Albuquerque, NM 87185 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 12期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

D O I：

10.1063/1.2189671

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report terahertz quantum-cascade lasers operating predominantly at 1.90 THz with side modes as low as 1.86 THz (lambda approximate to 161 mu m, h omega approximate to 7.7 meV). This is the longest wavelength to date of any solid-state laser that operates without assistance of a magnetic field. Carriers are injected into the upper radiative state by using a single quantum-well injector, which resulted in a significant reduction of free-carrier losses. The laser operated up to a heat-sink temperature of 110 K in pulsed mode, 95 K in continuous wave (cw) mode, and the threshold current density at 5 K was similar to 140 A/cm(2).

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页数：3

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