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Opt Express. 2004 May 3;12(9):1885-91.

Use of nondegenerate resonant leaky modes to fashion diverse optical spectra.

Abstract

In this paper, we show that bandstop and bandpass filters with versatile spectral attributes can be implemented with modulated films possessing asymmetric grating profiles. The profile asymmetry breaks the resonant leaky mode degeneracy at normal incidence thereby permitting precise spectral spacing of interacting leaky modes with interesting implications in optical filter design. Several example filters, containing only a single grating layer, are designed with this methodology to demonstrate the concept.

PMID:
19475020
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