Low-threshold and high power λ∼9.0 μm quantum cascade lasers operating at room temperature

被引:27
作者
Matlis, A [1 ]
Slivken, S [1 ]
Tahraoui, A [1 ]
Luo, KJ [1 ]
Diaz, J [1 ]
Wu, Z [1 ]
Rybaltowski, A [1 ]
Jelen, C [1 ]
Razeghi, M [1 ]
机构
[1] Northwestern Univ, Ctr Quantum Devices, Dept Elect & Comp Engn, Evanston, IL 60208 USA
关键词
D O I
10.1063/1.1310632
中图分类号
O59 [应用物理学];
学科分类号
摘要
We report a low threshold current density and high power for lambda similar to 9 mu mAlInAs/GaInAs quantum cascade lasers operating at room temperature. The threshold current density is 1.95 kA/cm(2) at 300 K and 0.61 kA/cm(2) at 80 K for 5 mu s pulses at 200 Hz repetition rate. The peak output power is 700 mW at room temperature and 1.3 W at 80 K per two facets for cavity length is 3 mm with a stripe width of 20 mu m. The characteristic temperature T-0 is 185 degrees C. The slope efficiency is 450 and 800 mW/A at 300 and 80 K, respectively. In continuous wave operation, the output power is more than 150 mW at 80 K and 25 mW at 140 K. This high performance was achieved by improving the material growth and processing technology. (C) 2000 American Institute of Physics. [S0003-6951(00)01038-X].
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页码:1741 / 1743
页数:3
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