1. School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
2. Division of Device Technology, Korea Advanced Nano Fab Center (KANC), Suwon 16229, Republic of Korea
3. Korea Atomic Energy Research Institute (KAERI), Daejeon 34057, Republic of Korea
4. School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
5. School of Energy Engineering, Korea Institute of Energy Technology (KENTECH), Naju 58330, Republic of Korea
6. Department of Nuclear and Radiation Safety, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea