Tunable Fano resonance in large scale polymer-dielectric slab photonic crystals

Abstract

Using interference lithography and deposition technique we have fabricated large scale quasi one dimensional polymer-dielectric photonic crystal that provides sharp and deep Fano resonance in the transmission spectrum of the PC at normal incidence. Due to high sensitivity of the polymer refractive index to the temperature, the obtained Fano resonance provides suitable condition to be used as a low threshold and high contrast thermo-optical switch. We show that by increasing 125 °C in the PC temperature, the transmittance increases five times near the deep of the Fano resonance. © 2012 Elsevier B.V. All rights reserved.