Cavity-induced back-action in Purcell-enhanced photoemission of a single ion in an ultraviolet fiber-cavity

TL;DR

This paper investigates how a fiber cavity influences the emission of a single trapped Yb+ ion, demonstrating control over photon emission rates through cavity-induced back-action in a Purcell-enhanced system.

Contribution

It presents the first demonstration of cavity-induced back-action effects in a fiber Fabry-Perot cavity with a single ion at ultraviolet wavelengths.

Findings

Achieved strong atom-cavity coupling with g=2π×67 MHz.

Observed cavity-induced back-action on ion emission.

Controlled photon emission rate by tuning back-action amplitude and phase.

Abstract

We study the behavior of a single laser-driven trapped ion inside a microscopic optical Fabry-Perot cavity. In particular, we demonstrate a fiber Fabry-Perot cavity operating on the principal $S_{1/2}\to P_{1/2}$ electric dipole transition of an Yb$^+$ ion at $369\,$nm with an atom-ion coupling strength of $g=2\pi\times 67(1)\,$MHz. We employ the cavity to study the generation of single photons and observe cavity-induced back-action in the Purcell-enhanced emission of photons. Tuning of the amplitude and phase of the back-action allows us to enhance or suppress the total rate of photoemission from the ion-cavity system.