1Shenzhen University, Institute of Microscale Optoelectronics, Collaborative Innovation Center for Optoelectronic Science and Technology, Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics, Shenzhen, China
2Vrije Universiteit Brussel, Department of Applied Physics and Photonics, Brussels Photonics, Brussels, Belgium
3Bulgarian Academy of Sciences, Institute of Solid State Physics, Sofia, Bulgaria