Silicon-silver metasurface based on regular bars as an effective SERS substrate

Observation of the surface enhanced Raman scattering (SERS) is hampered by the background surface luminescence. We investigate the metasurface made of periodic silicon micro bars. Bars are covered by the silver nanolayer. Computer simulations as well as real experiment reveal an anomalous optical re...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 1461; no. 1; pp. 12057 - 12060
Main Authors Ivanov, Andrey, Sarychev, Andrey K., Bykov, Igor, Boginskaya, Irina, Lagarkov, Andrey, Ryzhikov, Ilya, Nechaeva, Natalia, Kurochkin, Ilya
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.03.2020
Subjects
Bars
Luminescence
Metasurfaces
Physics
Raman spectra
Silicon
Silver
Substrates
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Summary:Observation of the surface enhanced Raman scattering (SERS) is hampered by the background surface luminescence. We investigate the metasurface made of periodic silicon micro bars. Bars are covered by the silver nanolayer. Computer simulations as well as real experiment reveal an anomalous optical response of the metasurface, which is due to the excitation of various metal-dielectric surface resonances. We demonstrate the enhancement of the Raman signal from a monolayer of 4-Mercaptophenylboronic acid (MPBA) when it is deposited on the microbar metasurface. The micro-bar metasurface exhibits large Raman/luminescence (signal/noise) ratio. As result it operates as a very efficient SERS substrate.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1461/1/012057