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We demonstrate modulation of the light scattered from a quantum emitter enhanced by surface acoustic wave cavities etched into the surface of GaAs, with the half-wave voltage V π as low as 44 mV.

We demonstrate etched-groove surface acoustic wave cavities on gallium arsenide with finesses reaching 100. These cavities can be used to enhance coupling between phonons and different quantum systems, providing a platform for quantum transduction.

We investigate the exciton exchange interaction of erbium doped GaAs quantum well using MDCS. We observe an energy shift of ~100µeV consistent with the predicted exchange energy and different pulse sequences activate specific excitonic pathways.

We demonstrate focusing cavities of surface acoustic waves on gallium arsenide with quality factors reaching 20,000. These cavities can potentially enhance coupling of surface phonons to a wide variety of quantum systems, possibly enabling efficient quantum transduction.

We use two coherent spectroscopy techniques to measure the strain tensor local to an ensemble of silicon-vacancy centers in diamond. Our results provide a possible pathway for using diamond as a tensorial strain gauge.

We demonstrate progress in developing a new microwave-optical quantum transducer. We demonstrate focusing and stable surface acoustic wave cavities at 3.4 GHz and characterize the acoustic performance. This work is a contribution of the National Institute of Standards and Technology; not subject to copyright in the United States of America.