Room temperature single-mode terahertz sources based on intracavity difference-frequency generation in quantum cascade lasers

被引：86

作者：

Lu, Q. Y. ^{[1
]}

Bandyopadhyay, N. ^{[1
]}

Slivken, S. ^{[1
]}

Bai, Y. ^{[1
]}

Razeghi, M. ^{[1
]}

机构：

[1] Northwestern Univ, Dept Elect Engn & Comp Sci, Ctr Quantum Devices, Evanston, IL 60208 USA

来源：

APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 13期

关键词：

distributed feedback lasers; laser beams; laser cavity resonators; laser feedback; laser modes; optical frequency conversion; optical pumping; quantum cascade lasers; terahertz wave devices; terahertz wave generation;

D O I：

10.1063/1.3645016

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate room temperature single-mode THz emission at 4 THz based on intracavity difference-frequency generation from mid-infrared dual-wavelength quantum cascade lasers. An integrated dual-period distributed feedback grating is defined on the cap layer to purify both mid-infrared pumping wavelengths and in turn the THz spectra. Single mode operation of the pumping wavelengths results in a single-mode THz operation with a narrow linewidth of 6.6 GHz. A maximum THz power of 8.5 mu W with a power conversion efficiency of 10 mu W/W(2) is obtained at room temperature. (C) 2011 American Institute of Physics. [doi:10.1063/1.3645016]

引用

页数：3

共 12 条

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