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Band-gap properties of two-dimensional low-index photonic crystals |
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| Authors: | A Matthews X-H Wang Y Kivshar M Gu |
| Institution: | (1) Nonlinear Physics Center and Center for Ultra-high bandwidth Devices for Optical Systems (CUDOS), Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, Australia;(2) Institute of Physics, Chinese Academy of Sciences, Beijing, 100080, China;(3) Center for Micro-Photonics and Center for Ultra-high bandwidth Devices for Optical Systems (CUDOS), Swinburne University of Technology, P.O. Box 218, Hawthorn, Victoria, 3122, Australia |
| Abstract: | We study the band-gap properties of two-dimensional photonic crystals created by a lattice of rods or holes conformed in a symmetric or asymmetric triangular structure. Using numerical plane-wave method, we calculate a minimum value of the refractive-index contrast for opening both partial and full two-dimensional spectral gaps for both TM- and TE-polarized waves. We also analyze the effect of ellipticity of rods and holes and their orientation on the threshold value and the relative size of the band gaps. |
| Keywords: | 42 70 Qs 78 20 Bh 78 20 Ci |
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