1. South China Academy of Advanced Optoelectronics School of Information and Optoelectronic Science and Engineering South China Normal University Guangdong 510006 China
2. Department of Chemical Engineering University of Waterloo Waterloo ON N2L 3G1 Canada
3. International Academy of Optoelectronics at Zhaoqing South China Normal University Zhaoqing 526060 China
4. School of Materials Science and Engineering Hebei University of Technology Tianjin 300130 China