1. Department of Physics
and Materials Science, City University of Hong Kong, 83 Tat Chee
Avenue, Kowloon, Hong Kong SAR 999077, China
2. Institute of Textiles
and Clothing, The Hong Kong Polytechnic University, 11 Hong Chong
Road, Hong Kong 999077, China
3. Shenzhen Municipal Engineering Design & Research Institute Co., Ltd., Shenzhen 518029, China
4. School of Mechanical, Electrical & Information Engineering, Shandong University, Weihai 264209, China