1. Intern at Microsoft Taiwan, Taipei, Taiwan
2. Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan
3. Research Assistant in the research group led by Shang-Hua Yang, National Tsing Hua University, Hsinchu, Taiwan
4. Department of Electrical Engineering and the Institute of Communications Engineering, NTHU, Hsinchu, Taiwan
5. Department of Electrical Engineering and the Deputy Director, National Tsing Hua University (NTHU) Terahertz Optics and Photonics Center at NTHU, Hsinchu, Taiwan