Quadrupole Interaction of Non-diffracting Beams with Two-Level Atoms

TL;DR

This paper demonstrates that various optical vortex modes can significantly enhance quadrupole interactions in atoms, especially near resonance, opening new possibilities for controlling atom-light interactions in experiments.

Contribution

It extends previous work by showing that not only Laguerre-Gaussian modes but also other optical vortex modes can enhance quadrupole interactions near resonance.

Findings

Quadrupole interactions are significantly enhanced with optical vortex modes.

Enhancement occurs near atomic resonance, especially for Cs atoms.

Potential for new experimental applications in atom-light interaction control.

Abstract

Recently it has been shown that the quadrupole interactions can be improved significantly as the atom interacts at near resonance with the Laguerre-Gaussian (LG) mode. In this paper, we illustrate that other kinds of optical vortex can be also led to a considerable enhancement of quadrupole interaction when the atom interacts with optical modes at near resonance. The calculations are performed on an interesting situation with Cs atom, where the process is concerned with dipole-forbidden and quadrupole-allowed transitions with a convenable choice of atomic and optical mode parameters. In this direction, we show that the quadrupole transitions can be significantly enhanced and therefore they can play an interesting role and lead to new features of atom-light interaction, which can have some constructive implications in experiments.