1. Department of Electronic Information Systems, Osaka City University, 3-3-138 Sumiyoshi, Osaka 558-8585, Japan
2. Institute for Materials Research (IMR), Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Japan
3. National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8563, Ibaraki, Japan
4. Institute for Materials Research (IMR), Tohoku University, 2145-2 Narita, Oarai 311-1313, Ibaraki, Japan
5. The Institute of Scientific and Industrial Research (ISIR), Osaka University, 8-1 Mihogaoka, Osaka 567-0047, Japan
6. Adamant Namiki Precision Jewel Co., Ltd., Shinden 3-8-22 Adachi-ku, Tokyo 123-8511, Japan
7. Department of Electrical and Electronic Engineering, Saga University, 1 Honjo-machi, Saga 840-8502, Japan