1. Department of Materials and Optoelectronic, 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. Institute of Innovative Semiconductor Manufacturing, National Sun Yat-sen University, Kaohsiung, Taiwan
4. Department of Physics, National Sun Yat-sen University, Kaohsiung, Taiwan
5. College of Semiconductor and Advanced Technology Research, National Sun Yat-sen University, Kaohsiung, Taiwan