A. V. Ivanov, N. V. Bakholdin, M. S. Mikhailov, A. N. Lagarkov, I. A. Ryzhikov, K. N. Afanasyev, I. V. Bykov, A. F. Smyk, A. V. Shurygin, A. N. Shalygin, G. Barbillon, A. K. Sarychev
- Institute for Theoretical and Appliance Electrodynamics, Russian Academy of Sciences, Moscow
- National Research University “Moscow Power Engineering Institute”
- National Research University MEPhI, Moscow
- James River Branch LLC, Moscow, Russia
- Faculty of Physics, Lomonosov Moscow State University
- EPF-Ecole d’Ingénieurs
Abstract: A new metasurface focusing light at a nanoscale is presented. The metasurface consists of periodic dielectric nanocavities with a top silver nanolayer. When interacting with the light, the metasurface exhibits plasmon resonances, which lead to the local electric field enhancement. The minima in the calculated and experimental reflectance spectra that indicate the light localisation on the metasurface are obtained. We propose that the metasurface can be an effective SERS substrate for the detection of various proteins, bacteria, viruses and their derivatives.
Keywords: metasurface, electric field enhancement, surface-enhanced Raman scattering, optical chemical sensors
This work was supported by the Russian Foundation for Basic Research (Grant No. 20-21-00080). The reflection measurements were supported by the Russian Science Foundation (Grant No. 21-79-30048).
Received: 14.02.2022
Revised: 18.04.2022