1. Key Laboratory of Optoelectronic Devices and Systems of Guangdong Province & Ministry of Education , College of Physics and Optoelectronic Engineering Shenzhen University , Shenzhen , Guangdong Province , 518060 , P. R. China
2. Department of Dermatology, Shenzhen Nanshan People’s Hospital and The 6th Affiliated Hospital of Shenzhen University Health Science Center, and Hua Zhong University of Science and Technology Union Shenzhen Hospital , Shenzhen , Guangdong Province, 518060 , P. R. China