1. Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Energy, Shenzhen University; 518060 Shenzhen China
2. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University; Shenzhen 518060 China
3. Institute of Thin Film Physics and Applications, College of Physics and Energy, Shenzhen University; Shenzhen 518060 China