Predictable surface emission patterns in terahertz photonic-crystal quantum cascade lasers

被引：28

作者：

Chassagneux, Y. ^{[1
,2
]}

Colombelli, R. ^{[1
,2
]}

Maineult, W. ^{[3
,4
]}

Barbieri, S. ^{[3
,4
]}

Khanna, S. P. ^{[5
]}

Linfield, E. H. ^{[5
]}

Davies, A. G. ^{[5
]}

机构：

[1] Univ Paris 11, Inst Elect Fondamentale, F-91405 Orsay, France

[2] CNRS, UMR8622, F-91405 Orsay, France

[3] Univ Paris 07, Lab MPQ, F-75013 Paris, France

[4] CNRS, UMR7162, F-75013 Paris, France

[5] Univ Leeds, Sch Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, England

来源：

OPTICS EXPRESS | 2009年 / 17卷 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

METAL WAVE-GUIDES;

D O I：

10.1364/OE.17.009491

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate a framework to understand and predict the far-field emission in terahertz frequency photonic-crystal quantum cascade lasers. The devices, which employ a high-performance three-well active region, are lithographically tunable and emit in the 104-120 mu m wavelength range. A peak output power of 7 mW in pulsed mode is obtained at 10 K, and the typical device maximum operating temperature is 136 K. We identify the photonic-crystal band-edge states involved in the lasing process as originating from the hexapole and monopole modes at the G point of the photonic band structure, as designed. The theoretical far-field patterns, obtained via finite-difference time-domain simulations, are in excellent agreement with experiment. Polarization measurements further support the theory, and the role of the bonding wires in the emission process is elucidated. (C) 2009 Optical Society of America

引用

页码：9491 / 9502

页数：12

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