Abstract

We present a systematic comparison of the metal layer assisted guided mode resonance-based sensing structures with the traditional guided mode resonance-based sensing structures sharing identical design parameters for various two-dimensional square hole and pillar grating type lattice configurations. The surface and volume integrals of the electromagnetic field intensity profiles at resonance have been computed for all the considered structures to show that the waveguide-pillar-based structures offer the strongest interaction between the resonant modes and the sensing region, resulting in a superior sensitivity. Further insights into the nature of metal assisted guided mode resonance-based sensors and the ways to generate a strong resonant response are reported for the visible range of operation.

© 2021 Optical Society of America

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