Monolithic and hybrid quantum photonic devices

Research Topic

An acoustic field in the form of surface acoustic wave can modify the optical and electronic properties of various low-dimensional structures such as quantum wells and quantum dots. In this project, we will use acoustic waves to control a single-photon source based on semiconductor quantum dots. The investigations have the potential to enable the development of novel integrated photonic devices using SAWs for on-chip control.


The main goal of the project is the demonstration of a single-photon source operating at GHz repetition rate based on the SAW-driven modulation of a QD transition. Ideally, the transition should be driven in and out of resonance with an optical microcavity during a SAW period to dynamically modulate the Purcell effect. A proof of principle device has been fabricated and characterized, and constitutes the first milestone.


Bruno Villa

Host: Toshiba Research Europe Limited

Scientific Background

During my studies at the University of Stuttgart I had the opportunity to work in research on nanotechnology and photonics. Specifically, I worked as a research assistant in a solar cell research centre and later completed a one year Master’s project in the group of Prof. Jörg Wrachtrup. The latter consisted of the integration of rare-earth ions doped in inorganic crystals with optical microcavities.

Conference/Workshop Contributions
    • Surface acoustic wave modulated single-photon generation from a quantum dot
      B. Villa, A. J. Bennett, D. J. P. Ellis, J. P. Lee, J. Skiba-Szymanska, T. A. Mitchell, J. Griffiths, I. Farrer, D. A. Ritchie, C. J. B. Ford, A. J. Shields
      SAWtrain Summer School: Physics and applications of GHz vibrations in semiconductors (Cargèse, France, Jul. 11-21, 2017) | Internal
Conference/Workshop Contributions
    • Surface acoustic wave modulated single photon source
      B. Villa
      Spice workshop: Quantum Acoustics meet Surface Acoustic Waves meets Solid State Qubits (Mainz, Germany, May 17-20, 2016) | Internal