Takashi Tokuda1, Makito Haruta2, Kiyotaka Sasagawa2, and Jun Ohta2
1: Institute of Innovative Research, Tokyo Institute of Technology, Japan
2: Graduate School of Science and Technology, Nara Institute of Science and Technology, Japan
Corresponding author: Takashi Tokuda
Since the rise of optogenetics, various types of optical stimulators have been proposed and realized. These include wired and wireless, single-site and multi-site, and with and without integration of other measurement / stimulation modalities. Naturally there is a trend to pursue very-small, light-weight devices that can be implanted or directly attached to animals. Such devices enable freely moving optogenetic experiments. Freely moving situations are preferred especially in behavioral experiments. Some research groups have been actively developing small, wireless, optogenetic stimulators [1-4]. Considering the importance of small size and lightness, most of the devices are developed with battery-less designs, meaning that power is wirelessly transferred during the operation. Realistic power transfer schemes for such devices are limited to either electromagnetic (RF-) or photovoltaic (PV-) powering.