1. ActLight SA, EPFL Innovation Park, Building I, 1015 Lausanne, Switzerland
2. Electronics laboratory, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
3. The Niels Bohr Institute, University of Copenhagen, Copenhagen DK-2100, Denmark
4. Ceramics laboratory, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
5. Ioffe Physical Technical Institute, 194021 St. Petersburg, Russia