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.
© 2004 Optical Society of America
Karlene Rosera Maskaly, Garry R. Maskaly, W. Craig Carter, and James L. Maxwell, "Diminished normal reflectivity of one-dimensional photonic crystals due to dielectric interfacial roughness," Opt. Lett. 29, 2791-2793 (2004)