Resonant excitonic emission of a single quantum dot in the Rabi regime

TL;DR

This paper demonstrates coherent resonant emission from a single quantum dot in a waveguide, observing Rabi oscillations up to three periods due to enhanced light-matter interaction facilitated by slow light effects, advancing quantum control techniques.

Contribution

It reports the first observation of Rabi oscillations in a single quantum dot embedded in a waveguide with slow light enhancement, enabling improved quantum state manipulation.

Findings

Rabi oscillations observed up to three periods.

Enhanced light-matter coupling due to slow light effect.

Potential for advanced quantum optics experiments.

Abstract

We report on coherent resonant emission of the fundamental exciton state in a single semiconductor GaAs quantum dot. Resonant regime with picoseconde laser excitation is realized by embedding the quantum dots in a waveguiding structure. As the pulse intensity is increased, Rabi oscillation is observed up to three periods. The Rabi regime is achieved owing to an enhanced light-matter coupling in the waveguide. This is due to a \emph{slow light effect} ($c/v_{g}\simeq 3000$), occuring when an intense resonant pulse propagates in a medium. The resonant control of the quantum dot fundamental transition opens new possibilities in quantum state manipulation and quantum optics experiments in condensed matter physics.