Optical and acoustic sensing using Fano-like resonances in dual phononic and photonic crystal plate

Samira Amoudache, Rayisa Moiseyenko, Yan Pennec, Bahram Djafari Rouhani, Antoine Khater, Ralf Lucklum, Rachid Tigrine

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Abstract

We perform a theoretical study based on the transmissions of optical and acoustic waves normally impinging to a periodic perforated silicon plate when the embedded medium is a liquid and show the existence of Fano-like resonances in both cases. The signature of the resonances appears as well-defined asymmetric peaks in the phononic and photonic transmission spectra. We show that the origin of the Fano-like resonances is different with respect to the nature of the wave. In photonic, the origin comes from guided modes in the photonic plate while in phononic we show that it comes from the excitation of standing waves confined inside the cavity coming from the deformation of the water/silicon edges of the cylindrical inclusion. We finally use these features for sensing and show ultra-sensitivity to the light and sound velocities for different concentrations of analytes.
Original languageEnglish
Article number114502
JournalJournal of Applied Physics
Volume119
Issue number11
Number of pages7
ISSN0021-8979
DOIs
Publication statusPublished - 2016

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