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Infrared spectral filtering based on guided-mode resonance structure

Abstract : We present the experimental study of a new design of band-pass filter based on guided-mode resonances in a free-standing metal-dielectric structure with subwavelength gratings. Component consists of a subwavelength gold grating with narrow slits deposited on a silicon nitride membrane. High optical transmission is measured with up to 78% transmission at resonance. Experimental angularly resolved spectra are presented: they reveal the role of the diffracted orders and of the waveguide eigenmode in the resonance. Spectra have a typical profile of Fano resonances: we show that this profile is due to interferences between a direct transmission channel through the 0th order, and an indirect transmission channel which results from the excitation by the ±1 diffracted orders of a waveguide eigenmode.
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https://hal-iogs.archives-ouvertes.fr/hal-01698621
Contributor : Fatima Pereira <>
Submitted on : Thursday, February 1, 2018 - 3:05:02 PM
Last modification on : Friday, June 26, 2020 - 2:04:03 PM

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Emilie Sakat, G. Vincent, P. Ghenuche, N. Bardou, S. Collin, et al.. Infrared spectral filtering based on guided-mode resonance structure. SPIE Photonics Europe, Nanophotonics IV, Apr 2012, Brussels, Belgium. ⟨10.1117/12.922563⟩. ⟨hal-01698621⟩

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