Materials, Photonic Devices, and Sensors

All-angle self-collimation in two-dimensional square array photonic crystals based on index contrast tailoring

[+] Author Affiliations
Mina Noori, Mohammad Soroosh

Shahid Chamran University of Ahvaz, Faculty of Engineering, Ahvaz 61357-831351, Iran

Hamed Baghban

University of Tabriz, School of Emerging-Engineering Technologies, Tabriz 51666-14761, Iran

Opt. Eng. 54(3), 037111 (Mar 27, 2015). doi:10.1117/1.OE.54.3.037111
History: Received December 27, 2014; Accepted March 11, 2015
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Abstract.  A comprehensive study has been performed to achieve all-angle self-collimation in basic two-dimensional square array photonic crystals with cylindrical scatterers. Based on plane wave expansion and finite difference time domain analysis for both rod- and hole-type structures, we report on all-angle self-collimation (SC) in the first band of the structure, which results in loss suppression due to out-of-plane scatterings. A lower threshold for index contrast has been obtained to achieve all-angle SC, which offers more design flexibility regarding structural parameters. Furthermore, it has been shown that a minimum and maximum coupling efficiency enhancement of 40% and 80% can be achieved for the proposed structure, respectively, by introducing a row of scatterers with proper radius at the input and the output air/photonic crystal interfaces.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Mina Noori ; Mohammad Soroosh and Hamed Baghban
"All-angle self-collimation in two-dimensional square array photonic crystals based on index contrast tailoring", Opt. Eng. 54(3), 037111 (Mar 27, 2015). ; http://dx.doi.org/10.1117/1.OE.54.3.037111


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