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A photonic crystal slab structure with one-dimensional periodicity, obtained by preferential etching of a silicon-on-insulator wafer, is numerically investigated in 3-D. The etched grooves are considered to be filled either with an isotropic or with a Nematic Liquid Crystal (NLC) material. The molecular director is calculated using a consistent model of NLC reorientation under an external voltage. Different structures together with a broad range of voltage values are numerically simulated by means of a three-dimensional finite-difference time-domain method. The shifting of the photonic bandgap induced by the applied voltage, as well as its sensitivity in terms of refractometric applications, are discussed for a range of different structure geometries.
Publication date: 
14 Apr 2009

AC Tasolamprou, Bob Bellini, Dimitrios C Zografopoulos, Emmanouil E Kriezis, Romeo Beccherelli

Biblio References: 
Volume: 4
Journal of the European Optical Society-Rapid publications