Author Affiliations

G. Saerens,^*,† E. Bloch,^† K. Frizyuk,^‡ V. Vogler-Neuling,^† E. Semenova,^£,§ E. Lebedkina,^£ M. Petrov,^‡ R. Grange,^† and M. Timofeeva^†

^†ETH Zurich, Optical Nanomaterial Group, Institute for Quantum Electronics, Department of Physics, 8093 Zürich, Switzerland

^‡ITMO University, Kronverkskiy prospect 49, 197101 St. Petersburg, Russia

^£DTU Fotonik, Technical University of Denmark, 2800 Kongens Lyngby, Denmark

^§NanoPhoton–Center for Nanophotonics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark

^*Corresponding author: gsaerens@phys.ethz.ch