International Conference Physics.SPb/2023 October 23-27, 2023, St. Petersburg
Nanophotonics

Tip-enhanced Raman scattering in epsilon-near-zero nanocavity

A. R. Gazizov^ab, M. Kh. Salakhov<sup>ab

a</sup> Institute of Physics, Kazan Federal University, Kazan, Russia
^b Institute of Applied Mathematical Research of Academy of Sciences of Republic of Tatarstan, 420111 Kazan, Russia

Abstract: Observation of molecular optomechanical effects is complicated by the need to localize electromagnetic energy in metal gaps about 1 nm in size. We propose to use a nanocavity with an epsilon-near-zero medium so that the conditions required for optomechanical coupling are less stringent. In this work, we simulate the enhancement of Raman scattering depending on the permittivity of the material and the polarization of the near field of the nanoparticle. It is shown that when the real part of dielectric permittivity close to zero, Raman scattering demonstrates an additional enhancement.

Keywords: molecular optomechanics, epsilon-near-zero, tip-enhanced Raman scattering, optical cooling, plasmonic nanocavity.

Received: 19.05.2023
Revised: 09.08.2023
Accepted: 30.10.2023

DOI: 10.61011/OS.2023.11.57016.5221-23

Bibliographic databases:

•