Multi-Wave Coherent Control of a Solid State Single Emitter

TL;DR

This paper demonstrates multi-wave mixing techniques to coherently control a single quantum dot exciton, enabling advanced manipulation of solid-state qubits using optical pulses and paving the way for NMR-like control schemes in quantum information processing.

Contribution

It introduces a novel multi-wave mixing approach to manipulate a single solid-state emitter, achieving control over its coherent optical response with multiple pulses.

Findings

Demonstrated four-wave and six-wave mixing on a single quantum dot

Controlled the spectro-temporal shape of the emitter's response

Validated analytical predictions of multi-wave mixing behavior

Abstract

Coherent control of individual two-level systems (TLSs) is at the basis of any implementation of quantum information. An impressive level of control is now achieved using nuclear, vacancies and charge spins. Manipulation of bright exciton transitions in semiconductor quantum dots (QDs) is less advanced, principally due to the sub-nanosecond dephasing. Conversely, owing to their robust coupling to light, one can apply tools of nonlinear spectroscopy to achieve all-optical command. Here, we report on the coherent manipulation of an exciton via multi-wave mixing. Specifically, we employ three resonant pulses driving a single InAs QD. The first two induce a four-wave mixing (FWM) transient, which is projected onto a six-wave mixing (SWM) depending on the delay and area of the third pulse, in agreement with analytical predictions. Such a switch enables to demonstrate the generation of SWM on a single emitter and to engineer the spectro-temporal shape of the coherent response originating from a TLS. These results pave the way toward multi-pulse manipulations of solid state qubits via implementing the NMR-like control schemes in the optical domain.