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Electro-tuning of surface state in two-dimensional photonic crystals

✍ Scribed by Vala, Ali Soltani ;Rezaei, Emad ;Hoseini, Naser ;Barvestani, Jamal

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
412 KB
Volume
208
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

In this paper, we have investigated the electro‐tuning of surface states in two‐dimensional square lattice photonic crystal (PC) of circular air holes in alumina background in which one row of the outermost air holes is infiltrated by a nematic liquid crystal (NLC). By minimizing the total (elastic plus electromagnetic) free energy, the configuration of the NLC directors, as a function of radial distance can be obtained. This configuration determines the dielectric tensor as function of radial distance. Therefore, by use of supercell method, dependence of surface states on applied electrical field has been studied. Numerical results show that position of surface modes can be effectively controlled by applying an external field on liquid crystal rods.

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