1. Department of Materials Science and Engineering, National Tsing-Hua University, Hsinchu 30013, Taiwan
2. College of Semiconductor Research, National Tsing-Hua University, Hsinchu 30013, Taiwan
3. Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
4. Department of Physics, National Sun Yet-Sun University, Kaohsiung 80424, Taiwan
5. Greenway Revolution Pte. Ltd., Bartley Ridge, Singapore 368063, Singapore
6. Semiconductor Research Center, Hon Hai Research Institute, Taipei 11492, Taiwan
7. Instrument Center, National Tsing Hua University, Hsinchu 30013, Taiwan