A. R. Gazizov, M. Kh. Salakhov, S. S. Kharintsev, “Optomechanical heating and cooling via tip-enhanced Raman scattering in epsilon-near-zero medium”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2023, Volume 117, Issue 9,Pages <nobr>670

This article is cited in 4 papers

OPTICS AND NUCLEAR PHYSICS

Optomechanical heating and cooling via tip-enhanced Raman scattering in epsilon-near-zero medium

A. R. Gazizov^ab, M. Kh. Salakhov^ba, S. S. Kharintsev^ab

^a Institute of Physics, Kazan Federal University, Kazan, 420008 Russia
^b Institute of Applied Research, Tatarstan Academy of Sciences, Kazan, 420111 Russia

Abstract: Media with the dielectric permittivity $\varepsilon (\omega )$ close to zero (epsilon-near-zero or ENZ) maintain conditions for enhanced light-matter interactions. In this paper, we propose to use these media to enhance the optomechanical coupling of vibrational excitations of the medium with the optical near-field of the nanoantenna. It is shown that the ENZ medium significantly increases the optically induced decay rate of a vibration, which can be used for cooling (when the incident light frequency is less than the ENZ frequency) or heating (when the incident light frequency is greater than the ENZ frequency). Due to the proximity of the refractive index to zero as well, oscillations of the polarization of the medium are coherent, which further enhances the optomechanical effects. Analytical expressions are obtained for the optical shift of the resonance and the induced decay rate.

Received: 23.03.2023
Revised: 31.03.2023
Accepted: 31.03.2023

DOI: 10.31857/S1234567823090057