1. Graduate School of Nanoscience and Nanoengineering, Waseda University, Tokyo, Japan
2. Graduate School of Fundamental Science and Engineering, Waseda University, Tokyo, Japan
3. Collaborative Microelectronic Design Excellence Centre, Universiti Sains Malaysia, Bayan Lepas, Penang, Malaysia
4. Institute of Nano Optoelectronics Research and Technology, Universiti Sains Malaysia, Bayan Lepas, Penang, Malaysia
5. Department of Management Information Sciences, Chiba Institute of Technology, Narashino, Chiba, Japan
6. Department of Electrical Engineering, Faculty of Information Science and Electrical Engineering, Kyushu University, Nishi-ku, Fukuoka, Japan
7. Kagami Memorial Laboratory for Materials Science and Technology, Waseda University, Tokyo, Japan