1. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
2. Research Center for Applied Science Academia Sinica, Taipei 11529, Taiwan
3. Department of Computer Science, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
4. Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan