[1] NTT Microsystem Integration Laboratories, Atsugi-shi, 243-0198, Japan
[2] Smart Devices Laboratory, NTT Microsystem Integration Laboratories, Japan
[3] Smart Devices Laboratory, Australia
[4] NTT Microsystem Integration Laboratories, Japan
[5] Ubiquitous Communication Appliance Technologies, NTT Microsystem Integration Laboratories, Japan
[6] High-Speed Devices and Technology Laboratory, NTT Photonics Laboratories, Japan