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Optical Engineering

All-angle self-collimation in two-dimensional square array photonic crystals based on index contrast tailoring
Author(s): Mina Noori; Mohammad Soroosh; Hamed Baghban
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Paper 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.

Paper Details

Date Published: 27 March 2015
PDF: 7 pages
Opt. Eng. 54(3) 037111 doi: 10.1117/1.OE.54.3.037111
Published in: Optical Engineering Volume 54, Issue 3
Show Author Affiliations
Mina Noori, Shahid Chamran Univ. of Ahwaz (Iran)
Mohammad Soroosh, Shahid Chamran Univ. of Ahwaz (Iran)
Hamed Baghban, Univ. of Tabriz (Iran)

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