Diminished normal reflectivity of one-dimensional photonic crystals due to dielectric interfacial roughness

TitleDiminished normal reflectivity of one-dimensional photonic crystals due to dielectric interfacial roughness
Publication TypeJournal Article
Year of Publication2004
AuthorsMaskaly, KR, Maskaly, GR, Carter, WCraig, Maxwell, JL
JournalOptics Letters
Volume29
Issue23
Pagination2791 - 2793
Date Published2004/12/01/
Abstract

Dielectric reflectors that are periodic in one dimension, also known as one-dimensional photonic crystals (1DPCs), have become extremely useful tools in the optics industry due to the presence of wavelength-tunable photonic bandgaps. However, little is known about the practical effects of manufacturing defects, such as interfacial roughness, on this technologically useful property of 1DPCs. We employ a finite-difference time-domain code to gain further insight into the effect of interfacial roughness on the reflectivity of quarter-wave-tuned 1DPCs in the center of the bandgap at normal incidence. This provides an estimate of the magnitude of the effect of the roughness for even the most-robust incidence conditions. (C) 2004 Optical Society of America.