Refractive index sensing with Fano resonances in silicon oligomers

We demonstrate experimentally refractive index sensing with localized Fano resonances in silicon oligomers, consisting of six disks surrounding a central one of slightly different diameter. Owing to the low absorption and narrow Fano-resonant spectral features appearing as a result of the interferen...

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Published inPhilosophical transactions of the Royal Society of London. Series A: Mathematical, physical, and engineering sciences Vol. 375; no. 2090; pp. 1 - 9
Main Authors Chong, Katie E., Orton, Henry W., Staude, Isabelle, Decker, Manuel, Miroshnichenko, Andrey E., Brener, Igal, Kivshar, Yuri S., Neshev, Dragomir N.
Format Journal Article
LanguageEnglish
Published THE ROYAL SOCIETY 28.03.2017
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Summary:We demonstrate experimentally refractive index sensing with localized Fano resonances in silicon oligomers, consisting of six disks surrounding a central one of slightly different diameter. Owing to the low absorption and narrow Fano-resonant spectral features appearing as a result of the interference of the modes of the outer and the central disks, we demonstrate refractive index sensitivity of more than 150 nm RIU⁻¹ with a figure of merit of 3.8. This article is part of the themed issue 'New horizons for nanophotonics'.
ISSN:1364-503X
1471-2962