Efficient spin control in high-quality-factor planar micro-cavities

TL;DR

This paper demonstrates that high-quality-factor semiconductor microcavities enable precise, high-fidelity spin control using picosecond laser pulses, even when accounting for realistic decay and dephasing processes.

Contribution

It introduces a detailed model of spin dynamics in microcavities with impurities, highlighting the benefits of high-Q cavities for spin manipulation.

Findings

High-Q cavities significantly improve spin control fidelity.

Picosecond laser pulses can induce spin-flips effectively.

Control remains robust despite decay and dephasing processes.

Abstract

A semiconductor microcavity embedding donor impurities and excited by a laser field is modelled. By including general decay and dephasing processes, and in particular cavity photon leakage, detailed simulations show that control over the spin dynamics is significally enhanced in high-quality-factor cavities, in which case picosecond laser pulses may produce spin-flip with high-fidelity final states.