Reconfigurable, defect-free, ultrahigh-Q photonic crystal microcavities for sensing

Abstract

We propose a new approach for creating reconfigurable high-Q cavities in defect-free photonic crystal slabs (PCSs). The approach relies on selective air-hole infiltration in otherwise defect-free PCSs. We show that using this method we can design ultrahigh-Q microcavities, with Q~106. Numerical calculations indicate a large number of high-Q modes with high sensitivity, which are ideal for simultaneous, multi-parameter refractive index-based sensing. © 2013 by the authors; licensee MDPI, Basel, Switzerland.