1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering; Jilin University; 2699 Qianjin Street Changchun 130012 China
2. Centre for Micro-Photonics, Faculty of Science, Engineering and Technology; Swinburne University of Technology; Hawthorn VIC 3122 Australia
3. Melbourne Centre for Nanofabrication; ANFF; 151 Wellington Road Clayton VIC 3168 Australia
4. College of Physics; Jilin University; 2699 Qianjin Street Changchun 130023 China