Graded photonic crystal terahertz quantum cascade lasers

被引：44

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：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

optoelectronic devices; photonic crystals; quantum cascade lasers; DISTRIBUTED-FEEDBACK LASERS; SURFACE EMISSION;

D O I：

10.1063/1.3273056

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The use of integrated photonic structures to tailor the behavior of light is extremely promising for optimizing performance and for introducing advanced functionalities into optoelectronic devices. We demonstrate a powerful method based on photonic-band engineering which allows the optimization of the resonator quality factors of devices operating on band-edge photonic-crystal states. We also show that carefully designed pi-shifts in two-dimensional photonic-resonators give enhanced beam properties. The application of these general techniques to terahertz quantum cascade lasers yields improved maximum operating temperatures, and angularly narrow, single-lobed surface emission of approximate to 12 degrees x8 degrees. The devices operate at approximate to 2.8/2.9 THz, with peak output powers of 5 mW at 78 K.

引用

页数：3

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