Application of the homogenization approximation to rough one-dimensional photonic crystals

TitleApplication of the homogenization approximation to rough one-dimensional photonic crystals
Publication TypeJournal Article
Year of Publication2005
AuthorsMaskaly, KR, Carter, WCraig, Averitt, RD, Maxwell, JL
JournalOptics Letters
Volume30
Issue21
Pagination2930 - 2932
Date Published2005/11/01/
Abstract

As previously reported [Opt. Lett. 29, 2791 (2004)], one-dimensional photonic crystals exhibit a decrease in their normal reflectivity if their interfaces are not flat. We show that the homogenization approximation accurately predicts this diminished optical response by comparing results with finite-difference time-domain (FDTD) simulations applied to the same roughened structures. Within the parameter range tested (rms roughness <20% and rms wavelengths <100% of the photonic crystal periodicity), the homogenization approximation accurately reproduces the reflectivities obtained by the FDTD simulations, which are much more computationally expensive. (c) 2005 Optical Society of America.