Surface acoustic wave regulated single photon emission from a coupled quantum dot-nanocavity system

摘要

A coupled quantum dot--nanocavity system in the weak coupling regime ofcavity quantumelectrodynamics is dynamically tuned in and out of resonance bythe coherent elastic field of a $f_{\rm SAW}\simeq800\,\mathrm{MHz}$ surfaceacoustic wave. When the system is brought to resonance by the sound wave,light-matter interaction is strongly increased by the Purcell effect. Thisleads to a precisely timed single photon emission as confirmed by the secondorder photon correlation function $g^{(2)}$. All relevant frequencies of ourexperiment are faithfully identified in the Fourier transform of $g^{(2)}$,demonstrating high fidelity regulation of the stream of single photons emittedby the system.