3.4-THz quantum cascade laser based on longitudinal-optical-phonon scattering for depopulation

被引：353

作者：

Williams, BS ^{[1
]}

Callebaut, H

Kumar, S

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 | 2003年 / 82卷 / 07期

关键词：

D O I：

10.1063/1.1554479

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the development of a quantum cascade laser, at lambda=87.2 mum, corresponding to 3.44 THz or 14.2 meV photon energy. The GaAs/Al0.15Ga0.85As laser structure utilizes longitudinal-optical (LO) phonon scattering for electron depopulation. Laser action is obtained in pulsed mode at temperatures up to 65 K, and at 50% duty cycle up to 29 K. Operating at 5 K in pulsed mode, the threshold current density is 840 A/cm(2), and the peak power is approximately 2.5 mW. Based on the relatively high operating temperatures and duty cycles, we propose that direct LO-phonon-based depopulation is a robust method for achieving quantum cascade lasers at long-wavelength THz frequencies. (C) 2003 American Institute of Physics.

引用

页码：1015 / 1017

页数：3

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