1. Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics, International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology of Ministry of Education, Shenzhen University
2. Shenzhen 518060
3. China
4. School of Physics & Astronomy, University of Birmingham
5. Birmingham B15 2TT
6. Faculty of Information Technology, Macau University of Science and Technology
7. Macao
8. UK