Polarized light Raman scattering by an atom near an ultrathin periodically aligned carbon nanotube film

TL;DR

This paper provides a theoretical analysis of Raman scattering enhancement for atoms near ultrathin, anisotropic carbon nanotube films, showing significant amplification of the effect for various light polarizations.

Contribution

It introduces a unified model describing quantum near-field enhancement effects for anisotropic metasurfaces, specifically ultrathin aligned carbon nanotube films.

Findings

Raman scattering cross-section can be enhanced by up to 10^4 times near the nanotube metasurface.

Both p-polarized and s-polarized light can experience significant enhancement.

The model accounts for polarization and incidence angle effects on scattering enhancement.

Abstract

We present a systematic theoretical study of the Raman scattering effect for a two-level atomic system in near proximity of an ultrathin dielectric film with an embedded parallel array of periodically aligned single-wall semiconducting carbon nanotubes. More generally, our model provides a unified description of the quantum near-field medium-assisted enhancement effects for in-plane anisotropic metasurfaces, of which ultrathin periodically aligned carbon nanotube films are the representative example. Particular attention is given to incoming photon parameters of the external light radiation such as polarization and incidence plane orientation relative to the main anisotropy axis (nanotube alignment axis). By explicitly deriving the Raman scattering cross-section, we establish that for the two-level atomic system in the near-field zone of the carbon nanotube metasurface the effect can be enhanced by a factor of up to 10^4, not only for p-polarized but for s-polarized light as well.