Plasmono-Atomic Interactions on a Fiber Tip

TL;DR

This paper demonstrates how a fiber tip with a plasmonic metasurface can detect atomic spectral modifications caused by atom-plasmon interactions, enabling compact hybrid atomic devices.

Contribution

It introduces a novel fiber-based sensor platform with a plasmonic metasurface for detecting atom-light interactions at the tip.

Findings

Inversion of phase modulation reflectivity spectra observed in Cesium vapor.

Detection of modifications in hyperfine atomic spectra due to plasmonic coupling.

Potential for developing compact hybrid atomic devices.

Abstract

Light-atom interaction can be engineered by interfacing atoms with various specially designed media and optical fibers are convenient platforms for realization of compact interfaces. Here, we show that an optical fiber sensor bearing a plasmonic metasurface at its tip can be used to detect modifications of the Doppler-free hyperfine atomic spectra induced by coupling between atomic and plasmonic excitations. We observed the inversion of the phase modulation reflectivity spectra of Cesium vapor in presence of the metamaterial. This work paves the way for future compact hybrid atomic devices with a cleaved tip as substrate platform to host various two-dimensional materials.