1. School of Materials and Chemical Technology, Tokyo Institute of Technology, Tokyo 152-8552, Japan
2. National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
3. Department of Materials Engineering, The University of Tokyo, Tokyo 113-8656, Japan
4. Department of Research Promotion, JST-PRESTO, Kawaguchi, Saitama, 332-0012, Japan