1. School of Information and Optoelectronic Science and Engineering & International Academy of Optoelectronics at Zhaoqing South China Normal University 510006 Guangzhou China
2. Department of Chemical Engineering University of Waterloo Waterloo ON N2L 3G1 Canada
3. School of Materials Science and Engineering State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology 300130 Tianjin China
4. South China Academy of Advanced Optoelectronics South China Normal University 510006 Guangzhou China