Terahertz sources based on Cerenkov difference-frequency generation in quantum cascade lasers

被引：99

作者：

Vijayraghavan, Karun ^{[1
]}

Adams, Robert W. ^{[1
]}

Vizbaras, Augustinas ^{[2
]}

Jang, Min ^{[1
]}

Grasse, Christian ^{[2
]}

Boehm, Gerhard ^{[2
]}

Amann, Markus C. ^{[2
]}

Belkin, Mikhail A. ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Elect & Comp Engn, Austin, TX 78758 USA

[2] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 25期

基金：

美国国家科学基金会;

关键词：

SECOND-HARMONIC GENERATION; WAVE-GUIDES; RADIATION;

D O I：

10.1063/1.4729042

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report room-temperature terahertz sources based on Cerenkov difference-frequency generation in dual-wavelength mid-infrared quantum cascade lasers with giant resonant optical nonlinearities originating from intersubband transitions. A Cerenkov difference-frequency generation scheme allows for extraction of THz radiation along the whole length of the laser waveguide and provides directional terahertz emission. Experimentally, our sources demonstrate a conversion efficiency of up to 70 mu W/W-2 approximately an order of magnitude improvement over the previous reports. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4729042]

引用

页数：4

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