Terahertz emission in asymmetric quantum wells by frequency mixing of midinfrared waves

被引：33

作者：

Dupont, Emmanuel ^{[1
]}

Wasilewski, Zbig R. ^{[1
]}

Liu, H. C. ^{[1
]}

机构：

[1] Natl Res Council Canada, Inst Microstruct Sci, Ottawa, ON K1A 0R6, Canada

来源：

IEEE JOURNAL OF QUANTUM ELECTRONICS | 2006年 / 42卷 / 11-12期

关键词：

difference frequency mixing; diffraction; intersubband transitions; midinfrared; nonlinear optics; terahertz (THz) semiconductor emitter;

D O I：

10.1109/JQE.2006.882877

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Generation of terahertz (THz), and sub-THz, coherent waves has been demonstrated at room temperature in GaAs-AlGaAs asymmetric quantum wells by mixing two CO2, laser beams. Two overlapping regimes were studied: the double resonance regime where three states are involved and the optical rectification which relies on two states only. The measured conversion efficiency of similar to 10(-7) W-1 is in reasonable agreement with theoretical predictions. In addition, this technique of THz generation provides a model system to study the emission profile from an ensemble of radiating dipoles. For instance, backward emission and strong diffraction effects have been observed.

引用

页码：1157 / 1174

页数：18

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