1. College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 China
2. School of Physics and AMBER Trinity College Dublin Dublin 2 Ireland
3. School of Information Engineering Lingnan Normal University Guangdong 524048 China
4. School of Chemistry and AMBER Trinity College Dublin Dublin 2 Ireland
5. Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 China