title: Antireflection coatings for multilayer-type photonic crystals.
abstract: The possibility of antireflection (AR) coatings on a dielectric multilayer having sub-wavelength deep structural modification is investigated. We numerically surveyed the effect of reflectivity reduction attained by double-layer AR coatings for a wavy multilayer on a patterned substrate. It was clarified that double-layer AR coatings for wavy multilayer is possible with a similar performance level as conventional flat multilayer. Also, it was demonstrated that a pair of AR layers effectively works for a wide range of the horizontal pitch.
authors.affiliation: Department of Electrical Engineering, Graduate School of Engineering, Tohoku University Aramaki-Aza-Aoba 6-6-05, Sendai 980-8579 Japan. ohtera@ecei.tohoku.ac.jp
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Ohtera
authors.forename: Daniel
authors.initials: D
authors.lastname: Kurniatan
authors.forename: Hirohito
authors.initials: H
authors.lastname: Yamada