Electrically pumped Terahertz quantum well sources

被引：16

作者：

Rochat, M

Faist, J

Beck, M

Oesterle, U

机构：

[1] Univ Neuchatel, Inst Phys, CH-2000 Neuchatel, Switzerland

[2] Swiss Fed Inst Technol, Dept Phys, PHB Ecublens, CH-1015 Lausanne, Switzerland

来源：

PHYSICA E | 2000年 / 7卷 / 1-2期

关键词：

Terahertz sources; plasmon waveguide; FIR quantum cascade lasers;

D O I：

10.1016/S1386-9477(99)00269-6

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Far infrared emission from quantum cascade structures is presented. Surface emission from a grating coupler show that the intersubband luminescence of our vertical transition structure is limited at low temperature by electron-electron scattering. As the temperature is increased, the limitation comes from the emission of optical phonons. Ln order to check for material gain, waveguide loss and differential gain measurements have been performed using a single-pass-type measurement. We report waveguide losses of 110 cm(-1) and differential gain of 23 cm(-1). Our results strongly suggest the possibility of far-infrared lasers using the quantum cascade technology coupled to double plasmon waveguides. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：44 / 47

页数：4

共 5 条

[1] SINGLE-PASS GAIN MEASUREMENTS ON OPTICALLY PUMPED ALXGA(1-X)AS-ALYGA(1-Y)AS DOUBLE-HETEROJUNCTION LASER STRUCTURES AT ROOM-TEMPERATURE [J].