Asymmetric light propagation in chirped photonic crystal waveguides

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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
Publisher
OPTICAL SOC AMER
Issue Date
2012-08
Language
English
Article Type
Article
Citation

OPTICS EXPRESS, v.20, no.18, pp.20635 - 20646

ISSN
1094-4087
DOI
10.1364/OE.20.020635
URI
http://hdl.handle.net/10203/282574
Appears in Collection
EE-Journal Papers(저널논문)
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