1. Department of General Physics, Moscow Region State University, Moscow, Russia
2. Liquid Crystals Laboratory, Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, Moscow, Russia
3. Department of Mechanics and Mechatronics of the Engineering Academy, RUDN University (Peoples’ Friendship University of Russia), Moscow, Russia
4. Department of Theoretical Physics, Moscow Region State University, Moscow, Russia
5. Raman Research Institute, Bangalore, India
6. Physics and Optoelectronic Engineering School, Foshan University, Guangdong, P.R. China