Low-threshold quantum-cascade lasers at 3.5 THz (λ=85 μm)

被引：26

作者：

Köhler, R

Tredicucci, A

Beltram, F

Beere, HE

Linfield, EH

Davies, AG

Ritchie, DA

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

来源：

OPTICS LETTERS | 2003年 / 28卷 / 10期

关键词：

D O I：

10.1364/OL.28.000810

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Chirped-superlattice quantum-cascade lasers are reported that emit at lambda similar to 85 mum (3.5 THz), which is to the authors' knowledge the longest wavelength demonstrated so far with this technology. Collected peak output powers of 1.5 mW per facet were measured at liquid-helium temperature, and a maximum operating temperature of 45 K was reached. Record low-threshold-current densities of 95 and 115 A cm(-2) were observed in pulsed and continuous-wave operation, respectively. For the latter, output powers of a few hundred microwatts are estimated at low temperatures. (C) 2003 Optical Society of America.

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页码：810 / 812

页数：3

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