Author Affiliations

J. A. Timpson,^1,* S. Lam,¹ D. Sanvitto,¹ D. M. Whittaker,¹ H. Vinck,¹ A. Daraei,¹ P. S. S. Guimaraes,¹ M. S. Skolnick,¹ A. M. Fox,¹ C. Hu,² Y.-L. Ho,² R. Gibson,² J. G. Rarity,² A. Tahraoui,³ M. Hopkinson,³ P. W. Fry,³ S. Pelligrini,⁴ K. J. Gordon,⁴ R. E. Warburton,⁴ and G. S. Buller⁴

¹Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, UK

²Department of Electrical & Electronic Engineering, University of Bristol, Bristol BS8 1UB, UK.

³Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield S1 3JD, UK

⁴School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, U.K..

^*Corresponding author: j.a.timpson@sheffield.ac.uk