1. Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi 441-8580, Japan
2. National Institute for Research and Development in Microtechnologies, Hyperion University, Erou Iancu Nicolae 126 A, 077190 Voluntari, and Calea Calarasilor 169, 030615, Romania
3. National Institutes for Quantum Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan
4. Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, Ibaraki 305-8505, Japan