Terahertz quantum-cascade laser with active leaky-wave antenna

被引：28

作者：

Tavallaee, Amir A. ^{[1
,2
]}

Williams, Benjamin S. ^{[1
,2
]}

Hon, Philip W. C. ^{[1
]}

Itoh, Tatsuo ^{[1
]}

Chen, Qi-Sheng ^{[3
]}

机构：

[1] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA

[2] Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USA

[3] Northrop Grumman Aerosp Syst, Redondo Beach, CA 90278 USA

来源：

APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 14期

基金：

美国国家科学基金会;

关键词：

beam steering; high-frequency transmission lines; leaky wave antennas; metamaterial antennas; microwave oscillators; microwave photonics; optical dispersion; quantum cascade lasers; terahertz wave devices; waveguide antennas; MODE;

D O I：

10.1063/1.3648104

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the demonstration of a one-dimensional waveguide for terahertz quantum-cascade ( QC) lasers, which acts as a leaky-wave antenna and tailors laser radiation in one dimension to a directional beam. This scheme adapts microwave transmission-line metamaterial concepts to a planar structure realized in terahertz metal-metal waveguide technology. The active leaky-wave antenna is fed by a master oscillator QC-laser with a mode that propagates with an effective phase index smaller than unity, such that it radiates in the surface direction. The direction of emission of main beam is governed by the antenna dispersion characteristic. 25 degrees of beam steering is observed as the lasing frequency of the QC-laser is varied from 2.65-2.81 THz. (C) 2011 American Institute of Physics. [doi:10.1063/1.3648104]

引用

页数：3

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