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Tokuda Lab
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The lab develops ultra-small devices and sensors, only a few millimeters in size, that run on light.
AboutAbout the lab
Millimeter-scale electronic devices powered by light
The Tokuda Lab researches new device technologies that combine semiconductor materials, electronic circuits, and device processes.
In particular, it works on biosensors including image sensors, ultra-small medical devices that can be implanted in the body, and IoT/IoE.
One pillar of its research is technology for running electronic devices of a few millimeters or less on power delivered by light.
The lab belongs to the Laboratory for Future Interdisciplinary Research of Science and Technology, Institute of Integrated Research, and its students are assigned from the Department of Electrical and Electronic Engineering, School of Engineering.
Key terms
- Optical power transmission
- Technology that delivers electrical energy to a distant device by shining light on it, without connecting wires
- IoE
- Internet of Everything. The idea of connecting even things with no electrical function, such as furniture and books, to the world of information
- RISC-V
- An instruction set architecture for computer processors that is openly published so that anyone can use it freely
NewsLab news
A paper by Assistant Professor Saito and colleagues was published in Advanced Electronic Materials
A paper by Assistant Professor Saito and colleagues was published in the Journal of the Japan Society for Laser Medicine
A master's student received the Excellent Paper Presentation Award at the IEEJ National Convention
Assistant Professor Saito received the 'Young Researcher Poster Session Excellent Presentation Award' (Tohoku University Graduate School of Dentistry–Institute of Science Tokyo FIRST Joint Research Project (ID…
A master's student received the 2023 Outstanding Master's Thesis Award from the Department of Electrical and Electronic Engineering
ResearchResearch themes
The lab researches new device technologies that combine semiconductor materials, electronic circuits, and device processes. It works to realize ultra-small devices that run on light, for biosensors, implantable devices, and IoT/IoE.
*Illustrative imageDelivering Power to Ultra-Small Devices with Light
This is technology for intermittently operating ultra-small electronic devices of a few millimeters or less using optical power transmission, which delivers power by light. By connecting small solar cells in series, the lab aims to realize an ultra-small power source that can be used for a variety of devices.
*Illustrative imageIoT/IoE Powered by Ambient Light
The lab studies millimeter-scale devices that run on the weak light around us, without needing dedicated illumination. It has achieved operation by storing light as weak as moonlight or a night light over time.
*Illustrative imageLight-Powered Wearable and Implantable Sensors
This research aims to power health-management devices that are worn or implanted in the body with light. As a first step, the lab is working on light-driven biosensors centered on technology for continuous blood glucose measurement.
*Illustrative imageLightweight Processors for IoT and Bio Applications
Aiming for 'a millimeter-scale ultra-small computer that runs on light,' the lab studies small, lightweight processors based on RISC-V. The goal is a mechanism that starts up with little energy, completes a task, and returns to rest.
MembersFaculty
The members of the Tokuda Lab consist of faculty, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorTakashi TokudaPublications ↗
- Assistant ProfessorMasato SaitoPublications ↗
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Close-up of a polycrystalline solar PV panel” Guilhem Vellut / CC BY 2.0 (cropped)
- Delivering Power to Ultra-Small Devices with Light: “Small solar cell” Santeri Viinamäki / CC BY-SA 4.0 (cropped)
- IoT/IoE Powered by Ambient Light: “CSIRO ScienceImage 3876 A remote sensing node part of CSIROs Fleck wireless sensor network technology” Stephan Brosnan, CSIRO / CC BY 3.0 (cropped)
- Light-Powered Wearable and Implantable Sensors: “Abbott Freestyle Libre 3 Glukosesensor in situ-1145” Raimond Spekking / CC BY-SA 4.0 (cropped)
- Lightweight Processors for IoT and Bio Applications: “RISC V prototype chip - closeup” Derrick Coetzee (User:Dcoetzee) / CC0 (cropped)
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- Related lab (中村研究室): “Ultrasonic motor” Yorkshire Terrier / Public domain (cropped)
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