1. Department of Physics, Institute
of Advanced Materials, and Institute of Research
and Continuing Education (Shenzhen), Hong Kong Baptist University, 224 Waterloo Road, Kowloon Tong, NT, Hong Kong
2. Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon
Tong, Hong Kong