1. Shenzhen Key Laboratory of Laser Engineering, Key Laboratory of Optoelectronic Devices and System of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
2. School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia
3. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States