Tunable Raman Photons from a Single Quantum Dot

TL;DR

This paper demonstrates all-optically tunable Raman fluorescence from a single quantum dot, with frequency tuning of about 2.5 GHz, offering a new method for studying spin-bath interactions in solid-state systems.

Contribution

It introduces a novel technique for tuning Raman photons from a quantum dot using optical methods and magnetic fields, enabling new investigations into spin interactions.

Findings

Raman photons can be tuned by about 2.5 GHz via laser detuning.

The number and linewidth of Raman photons depend on detuning.

The method provides a basis for studying spin-bath interactions.

Abstract

We report the observation of all-optically tunable Raman fluorescence from a single quantum dot. The Raman photons are produced in an optically-driven Lambda-system defined by subjecting the single electron charged quantum dot to a magnetic field in Voigt geometry. Detuning the driving laser from resonance, we tune the frequency of the Raman photons by about 2.5 GHz. The number of scattered photons and the linewdith of the Raman photons are investigated as a function of detuning. The study presented here could form the basis of a new technique for investigating spin-bath interactions in the solid state.