Silent-enhancement of multiple Raman modes via tuning optical properties of graphene nanostructures

نویسندگان

چکیده

Raman scattering signal can be enhanced through localization of incident field into sub-wavelength hot-spots plasmonic nano-structures (Surface-enhanced scattering-SERS). Recently, further enhancement SERS via quantum objects are proposed by [1] without increasing the hot-spot intensity (\textit{silent-enhancement}) where this suggestion prevents modification vibrational modes or breakdown molecules. The method utilizes path interference in non-linear response Stokes-shifted modes. In work, we extend phenomenon to tune spectral position \textit{silent-enhancement} factor multiple detected with a better signal-to-noise ratio, simultaneously. This achieved two different schemes employing either (i) graphene structures emitters (ii) replacing spherical nano-shell \cite{Postaci2018}. addition, latter system is exactly solvable steady-state. These suggestions not only preserve conventional processes but also provide flexibility enhance (silently) due tunable optical properties graphene.

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ژورنال

عنوان ژورنال: European Physical Journal Plus

سال: 2022

ISSN: ['2190-5444']

DOI: https://doi.org/10.1140/epjp/s13360-022-03560-3