Asymmetric light propagation in chirped photonic crystal waveguides

被引：66

作者：

Kurt, H. ^{[1
]}

Yilmaz, D. ^{[1
]}

Akosman, A. E. ^{[2
]}

Ozbay, E. ^{[2
]}

机构：

[1] TOBB Univ Econ & Technol, Dept Elect & Elect Engn, TR-06560 Ankara, Turkey

[2] Bilkent Univ, Nanotechnol Res Ctr, Dept Elect & Elect Engn, TR-06800 Ankara, Turkey

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 18期

关键词：

OPTICAL DIODE; UNIDIRECTIONAL TRANSMISSION; GRATINGS;

D O I：

10.1364/OE.20.020635

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report numerical and experimental investigations of asymmetric light propagation in a newly designed photonic structure that is formed by creating a chirped photonic crystal (PC) waveguide. The use of a non-symmetric distribution of unit cells of PC ensures the obtaining of asymmetric light propagation. Properly designing the spatial modulation of a PC waveguide inherently modifies the band structure. That in turn induces asymmetry for the light's followed path. The investigation of the transmission characteristics of this structure reveals optical diode like transmission behavior. The amount of power collected at the output of the waveguide centerline is different for the forward and backward propagation directions in the designed configuration. The advantageous properties of the proposed approach are the linear optic concept, compact configuration and compatibility with the integrated photonics. These features are expected to hold great potential for implementing practical optical rectifier-type devices. (C) 2012 Optical Society of America

引用

页码：20635 / 20646

页数：12

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