Temperature dependent characteristics of λ∼3.8 μm room-temperature continuous-wave quantum-cascade lasers

被引：99
作者：
Yu, J. S. [1 ]
Evans, A. [1 ]
Slivken, S. [1 ]
Darvish, S. R. [1 ]
Razeghi, M. [1 ]
机构：
[1] Northwestern Univ, Ctr Quantum Devices, Dept Elect Engn & Comp Sci, Evanston, IL 60208 USA
来源：
APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 25期
关键词：
D O I：
10.1063/1.2216024
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Temperature dependent characteristics of lambda similar to 3.8 mu m quantum-cascade lasers (QCLs) operating up to 318 K in continuous-wave (cw) mode are reported. A high-reflectivity coated 11.5-mu m-wide and 4-mm-long epilayer-down bonded QCL using a diamond submount shows a considerable improved cw operation with an output power of 143 mW and a threshold current density of 1.51 kA/cm(2) at 298 K. The temperature dependence on optical and electrical performances of the QCLs with respect to the output power, slope efficiency, threshold current/voltage, turn-on voltage, differential series resistance, and emission wavelength are investigated systematically above liquid nitrogen temperature. (c) 2006 American Institute of Physics.
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