title: Matrix Fabry-Perot resonance mechanism in high-contrast gratings.
abstract: We present a simple analytic formalism to explain the unique resonance phenomenon in subwavelength high-contrast gratings (HCG). We show that the resonances are due to strong coupling between two surface-normal waveguide array modes resulting from abrupt and large index contrast. Simple expression for HCG quality factor is derived that agrees with spectral-fitting approaches reported in literature.
authors.affiliation: Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720, USA.
authors.forename: Vadim
authors.initials: V
authors.lastname: Karagodsky
authors.forename: Christopher
authors.initials: C
authors.lastname: Chase
authors.forename: Connie J
authors.initials: CJ
authors.lastname: Chang-Hasnain