Quantum Dot Optomechanics with Coherent Elastic Waves

by Hubert J. Krenner (University of Augsburg)

Wednesday 25 Jul 2018, 11:45 → 12:45 Europe/Rome

Aula Amaldi (Dip. di Fisica - Edificio G. Marconi)

I will give an overview on our recent advances on the control of quantum dots (QDs) by surface acoustic waves (SAWs). I will demonstrate the dynamic acoustic field of a SAW modulates both the optical transition of a QD and that the underlying sound-matter coupling allows for pressure sensing on the nanoscale. Light-matter interaction can be controlled by our nanoscale sound waves, when embedding the QD inside a photonic crystal nanocavity. Here, the Purcell-effect can be gated dynamically on sub-lifetime timescales by the combined acousto-optic tuning of the QD and the high quality optical mode. This gives rise to a precisely triggered emission of single photons by the QD.