Far-infrared surface-plasmon quantum-cascade lasers at 21.5 μm and 24 μm wavelengths

被引:188
作者
Colombelli, R [1 ]
Capasso, F [1 ]
Gmachl, C [1 ]
Hutchinson, AL [1 ]
Sivco, DL [1 ]
Tredicucci, A [1 ]
Wanke, MC [1 ]
Sergent, AM [1 ]
Cho, AY [1 ]
机构
[1] Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA
关键词
D O I
10.1063/1.1367304
中图分类号
O59 [应用物理学];
学科分类号
摘要
Quantum-cascade lasers operating above 20 mum (at lambda similar to 21.5 mum and lambda similar to 24 mum) wavelength are reported. Pulsed operation was obtained up to 140 K and with a peak power of a few milliwatts at cryogenic temperatures. Laser action originates from interminiband transitions in "chirped" superlattice active regions. The waveguides are based on surface-plasmon modes confined at a metal-semiconductor interface. The wavelengths were chosen in order to avoid major phonon absorption bands, which are particularly strong at energies just above the reststrahlen band. We also report on a 21.5-mum-wavelength laser based on a two-sided interface-plasmon waveguide. (C) 2001 American Institute of Physics.
引用
收藏
页码:2620 / 2622
页数:3
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