1. Department of Physics, National Sun Yat-sen University, Kaohsiung, Taiwan
2. Department of Physics, Center of Crystal Research, and the College of Semiconductor and Advanced Technology Research, National Sun Yat-sen University, Kaohsiung, Taiwan
3. Department of Photonics, National Sun Yat-sen University, Kaohsiung, Taiwan
4. Department of Electrical Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan
5. SmartKem Ltd, Manchester, U.K