Optics and Spectroscopy
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- 2023
- 2022
Tip-enhanced Raman scattering in epsilon-near-zero nanocavity
Gazizov A. R.
1,2, Salakhov M. Kh.
1,2
1Institute of Physics, Kazan Federal University, Kazan, Russia
2Institute of Applied Research, Tatarstan Academy of Sciences, Kazan, Russia
2Institute of Applied Research, Tatarstan Academy of Sciences, Kazan, Russia
Email: equusmeteores@gmail.com
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.
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