Discontinuous wavelength super-refraction in photonic crystal superprism

被引：17
|
作者：
Lupu, A [1 ]
de Lustrac, A
Ourir, A
Checoury, X
Lourtioz, JM
机构：
[1] Univ Paris 11, CNRS, UMR 8622, Inst Elect Fondamentale, F-91405 Orsay, France
[2] Univ Montpellier 2, CNRS, UMR 5650, Etud Semicond Grp, F-34095 Montpellier, France
[3] Alcatel Thales III V Lab, F-91767 Palaiseau, France
来源：
OPTICS EXPRESS | 2006年 / 14卷 / 05期
关键词：
D O I：
10.1364/OE.14.002003
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Experimental results on wavelength-dependent angular dispersion in InGaAsP triangular lattice planar photonic crystals are presented. An abrupt variation of the angular dispersion is observed for TM-polarized waves whose frequencies are comprised between those of the fourth and sixth allowed bands. According to the crystal period, the measured angle of refraction is found to either decrease or increase by 30 degrees within a wavelength range smaller than 30 nm. Experimental results are reproduced well from 2D finite difference time domain calculations. The observed phenomena are interpreted from the coupling of the incident light to different modes of the photonic crystal that travel with different group velocities and propagate in different directions within the crystal. Mode dispersion curves and mode patterns are calculated along with isofrequency curves to support this explanation. The observed discontinuous wavelength super-refraction opens a new approach to the application of superprisms. (c) 2006 Optical Society of America.
引用
收藏
页码：2003 / 2013
页数：11
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