1. Department of ECE, Johns Hopkins University, Baltimore, Maryland 21218, United States
2. Institute of Optical and Electronic Materials, Hamburg University of Technology, Eissendorfer Strasse 38, Hamburg, 21073, Germany
3. Institute of Materials Research, Helmholtz-Zentrum Geesthacht Centre for Materials and Coastal Research, Max-Planck-Strasse 1, Geesthacht, 21502, Germany
4. Research Institute for Optical Materials Science, ITMO University, Saint Petersburg, 199034, Russia
5. P. N. Lebedev Physical Institute of Russian Academy of Sciences, Leninsky pr. 53, Moscow, 119991, Russia