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
收藏
页数：3
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