title: Wide-field-of-view narrow-band spectral filters based on photonic crystal nanocavities.
abstract: We describe a novel approach to implementing wide-field-of-view narrow-band spectral filters, using an array of resonant nanocavities consisting of periodic defects in a two-dimensional three-material photonic-crystal nanostructure. We analyze the transmissivity of this type of filter for a range of wavelengths and in-plane incidence angles as a function of the defect's refractive index, the number of layers in the photonic-crystal reflectors, and the period of the defects and find that this structure diminishes the angular sensitivity of the resonance condition relative to that of a standard multilayer filter.
authors.forename: Wataru
authors.initials: W
authors.lastname: Nakagawa
authors.forename: Pang-Chen
authors.initials: PC
authors.lastname: Sun
authors.forename: Chyong-Hua
authors.initials: CH
authors.lastname: Chen
authors.forename: Yeshaiahu
authors.initials: Y
authors.lastname: Fainman