Infrared spectral filtering based on guided-mode resonance structure

E. Sakat; G. Vincent; P. Ghenuche; N. Bardou; S. Collin; F. Pardo; J.-L. Pelouard; R. Haïdar

doi:10.1117/12.922563

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30 April 2012 Infrared spectral filtering based on guided-mode resonance structure

E. Sakat, G. Vincent, P. Ghenuche, N. Bardou, S. Collin, F. Pardo, J.-L. Pelouard, R. Haïdar

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Proceedings Volume 8424, Nanophotonics IV; 842414 (2012) https://doi.org/10.1117/12.922563
Event: SPIE Photonics Europe, 2012, Brussels, Belgium

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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E. Sakat, G. Vincent, P. Ghenuche, N. Bardou, S. Collin, F. Pardo, J.-L. Pelouard, and R. Haïdar "Infrared spectral filtering based on guided-mode resonance structure", Proc. SPIE 8424, Nanophotonics IV, 842414 (30 April 2012); https://doi.org/10.1117/12.922563

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