https://doi.org/10.1140/epjp/s13360-022-03560-3
Regular Article
Silent-enhancement of multiple Raman modes via tuning optical properties of graphene nanostructures
1
Department of Physics, Akdeniz University, 07058, Antalya, Turkey
2
Institute of Nuclear Sciences, Hacettepe University, 06800, Ankara, Turkey
Received:
20
June
2022
Accepted:
25
November
2022
Published online:
10
December
2022
Raman scattering signal can be enhanced through localization of incident field into sub-wavelength hot-spots through plasmonic nanostructures (surface-enhanced raman scattering—SERS). Recently, further enhancement of SERS signal via quantum objects are proposed by Postaci (Nanophotonics 7:1687, 2018) without increasing the hot-spot intensity (silent-enhancement) where this suggestion prevents the modification of vibrational modes or the breakdown of molecules. The method utilizes path interference in the nonlinear response of Stokes-shifted Raman modes. In this work, we extend this phenomenon to tune the spectral position of silent-enhancement factor where the multiple vibrational modes can be detected with a better signal-to-noise ratio, simultaneously. This can be achieved in two different schemes by employing either (i) graphene structures with quantum emitters or (ii) replacing quantum emitters with graphene spherical nano-shell in Postaci (Nanophotonics 7:1687, 2018). In addition, the latter system is exactly solvable in the steady-state. These suggestions not only preserve conventional nonlinear Raman processes but also provide flexibility to enhance (silently) multiple vibrational Raman modes due to the tunable optical properties of graphene.
Copyright comment Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
