1. Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP) City University of Hong Kong Kowloon Hong Kong SAR 999077 P. R. China
2. Institute of Automation and Control Processes of the FEB RAS 5 Radio St. Vladivostok 690041 Russia
3. School of Physics and Engineering ITMO University Saint‐Petersburg 197101 Russia
4. Department of Physics Hong Kong University of Science and Technology Clear Water Bay Rd Kowloon Hong Kong SAR 999077 P. R. China
5. CIC NanoGUNE BRTA Avda Tolosa 76 Donostia‐San Sebastian 20018 Spain
6. Department of Physics City University of Hong Kong Kowloon Hong Kong SAR 999077 P. R. China
7. Pacific Quantum Center Far Eastern Federal University Vladivostok 690922 Russia