1. Photon Science Institute and Department of EEE, The University of Manchester, Manchester M13 9PL, United Kingdom
2. Department of Physics and I3N, University of Aveiro, Campus Santiago, 3810-193 Aveiro, Portugal
3. Department of Electronics and Nanoengineering, Aalto University, Tietotie 3, FI-02150 Espoo, Finland
4. Nexcel Electronic Technology, Gresham, 97030 Oregon, USA
5. Leibniz-Institut für Kristallzüchtung (IKZ), Max-Born-Straᶔe 2, 12489 Berlin, Germany
6. Scientific-Practical Materials Research Center of National Academy of Sciences of Belarus, Minsk 220072, Belarus