1. IT Convergence Technology Research Laboratory; Electronics and Telecommunications Research Institute (ETRI); Daejeon 305-350 Republic of Korea
2. Division of Materials Science; Korea basic Science Institute (KBSI); Daejeon 305-333 Republic of Korea
3. IT Convergence Technology Research Laboratory; Electronics and Telecommunications Research Institute (ETRI); Daejeon 302-350 Republic of Korea
4. Interdisciplinary School of Green Energy, KIER-UNIST Center for Energy; Ulsan National Institute of Science and Technology (UNIST); Ulsan 689-798 Republic of Korea
5. Department of Physics; Incheon National University; Incheon 406-772 Republic of Korea