1. Center of Information Optical Technology ITMO University St. Petersburg 197101 Russia
2. Key Laboratory of Automobile Materials College of Materials Science and Engineering Jilin University Changchun 130012 P. R. China
3. Department of Materials Science and Engineering Centre for Functional Photonics (CFP) City University of Hong Kong Kowloon Hong Kong SAR P. R. China
4. Shenzhen Research Institute City University of Hong Kong Shenzhen 518057 P. R. China