Dynamically Controlled Resonance Fluorescence from a Doubly Dressed Solid-State Single Emitter

TL;DR

This paper experimentally demonstrates quantum interference effects in a quantum dot, leading to spectral line elimination and spectral modifications through double dressing, advancing control over solid-state quantum emitters.

Contribution

It presents the first experimental observation of interference-induced spectral line elimination in a solid-state quantum emitter using double dressing.

Findings

Nearly complete spectral line elimination at the laser frequency.

Observation of multiphoton ac Stark effect with shifted subharmonics.

Dynamical control of resonance fluorescence spectra through double dressing.

Abstract

We report the first experimental demonstration of interference-induced spectral line elimination predicted by Zhu and Scully [Phys. Rev. Lett. 76, 388 (1996)] and Ficek and Rudolph [Phys. Rev. A 60, 4245 (1999)]. We drive an exciton transition of a self-assembled quantum dot in order to realize a two-level system exposed to bichromatic laser field and observe nearly complete elimination of the resonance fluorescence spectral line at the driving laser frequency. This is caused by quantum interference between coupled transitions among the doubly dressed excitonic states, without population trapping. We also demonstrate multiphoton ac Stark effect with shifted subharmonic resonances and dynamical modifications of resonance fluorescence spectra by using double dressing.