1. Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Optical Information Materials and TechnologySouth China Academy of Advanced OptoelectronicsSouth China Normal University Guangzhou Guangdong 510006 China
2. Laboratory of Solid State Microstructures and Innovation Center of Advanced MicrostructuresNanjing University Nanjing Jiangsu 210093 China
3. Department of Materials Science and EngineeringSouthern University of Science and Technology Shenzhen Guangdong 518055 China
4. Guangdong Provincial Key Laboratory of Optical Information Materials and National Center for International Research on Green OptoelectronicsSouth China Academy of Advanced OptoelectronicsSouth China Normal University Guangzhou Guangdong 510006 China