Matrix Fabry-Perot resonance mechanism in high-contrast gratings

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 f...

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Bibliographic Details
Published inOptics letters Vol. 36; no. 9; p. 1704
Main Authors Karagodsky, Vadim, Chase, Christopher, Chang-Hasnain, Connie J
Format Journal Article
LanguageEnglish
Published United States 01.05.2011
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Summary: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.
ISSN:1539-4794
DOI:10.1364/OL.36.001704