https://doi.org/10.1140/epjp/s13360-024-05816-6
Regular Article
Hybrid plasmonic modes in multilayer result in enantiomer pair discrimination
1
University of Napoli ’Federico II, Piazzale Tecchio 80, 80125, Napoli, Italy
2
Department of Physics, New Uzbekistan University, Tashkent, Uzbekistan
Received:
10
September
2024
Accepted:
3
November
2024
Published online:
29
November
2024
In this study, an experimental investigation of a multilayer/antenna system is conducted. The system features the hybridization of waveguide and surface plasmon polariton mode. Experimental and numerical results were examined to characterize the behavior of the plasmonic design. The multilayer structure is composed of silver (Ag), platinum, silica (SiO2), and silicon; however, when the silicon surface is etched, micrometric features are generated, which have been observed to behave as plasmonic antennae and to aid in the formation of the waveguide mode. The configuration allows for the efficient guiding of electromagnetic waves through the structure, while the micrometric roughness enables the transmission associated with localized surface plasmon resonance. When a red dye is deposited onto a multilayer surface, it triggers a strong interaction between excitons and polaritons. This interaction leads to a notable increase in radiation force, which refers to the force exerted by electromagnetic radiation. Furthermore, the enhancement of radiation force induced by the dye supports the application of passive chirality spectroscopy as a means to measure the optical forces acting on enantiomers. In conclusion, when a Kretschmann scheme is combined with the de-polarization, a built-in asymmetry results in a different optical flux of spectrum photons. All this leads to distinct, enantioselective, and solely polarization-dependent spectral contrast, which enables the demonstration of the enantioselectivity for the d,l-penicillamine.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. 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.
