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Takenaka Lab
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The lab studies silicon photonics, building optical circuits on silicon.
AboutAbout the lab
Optoelectronic circuits for the AI and IoT era, built with silicon photonics
The Takenaka Lab studies silicon photonics, a technology for building optical circuits on a silicon substrate.
It uses the same manufacturing processes as computer chips to integrate many optical components into a single chip.
Its uses are expanding beyond optical communication in data centers to computation for AI and quantum information processing, LiDAR, biosensors, and more.
The lab researches new devices, circuits, and the systems that use them, with the aim of building optoelectronic integrated circuits.
Key terms
- Silicon photonics
- A technology that uses the same manufacturing processes as semiconductor chips to build optical paths and components on a silicon substrate
- Optical phase shifter
- A component that uses electricity to change the offset (phase) between the peaks and troughs of a light wave. It is used for switching and computation in optical circuits
- Mid-infrared light
- Light in the range of wavelengths, within infrared light (which has longer wavelengths than visible light), that many molecules absorb strongly
NewsLab news
A doctoral student received the Best Student Poster Award at CSW 2026
Results of joint research with the Graduate School of Science and others were published in Science
A master's student received the Outstanding Master's Thesis Award
A doctoral student received the Best Student Poster Award at the Japan/Taiwan joint workshop on Silicon Photonics
A doctoral student received the 24th IEEE EDS Japan Joint Chapter Student Award
ResearchResearch themes
The lab studies new optical devices and circuits based on silicon photonics, as well as the systems that use them. Its work includes circuits that perform AI computation with light, technology that replaces on-chip wiring with optical interconnects, and sensors that measure molecules and other targets with light.
*Illustrative imageCircuits That Perform AI Computation with Light
This research arranges many optical phase shifters on a silicon photonic circuit to perform deep learning computation with light. Using optical phase shifters made by bonding thin films of compound semiconductors onto silicon, the lab aims to build large-scale, low-power, high-speed computing devices.
*Illustrative imageReplacing Chip Wiring with Light
To solve the delay and power consumption problems of electrical wiring inside chips, the lab studies LSIs with optical input/output and optical communication devices for optical-interconnect LSIs. It combines silicon with other materials, such as germanium and compound semiconductors.
*Illustrative imageOptical Sensing with Mid-Infrared Light
The lab studies photonic integrated circuits for sensing, using germanium instead of silicon. Using mid-infrared light, which has rarely been used until now, it aims to realize molecular sensors and medical and biosensors.
MembersFaculty
The members of the Takenaka Lab consist of faculty, project researchers, secretaries, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorMitsuru TakenakaPublications ↗
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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: “Silicon Photonics 300mm wafer” Ehsanshahoseini / CC BY-SA 4.0 (cropped)
- Circuits That Perform AI Computation with Light: “FMN Lab electro-optical integrated modulator” FMNLab / CC BY 4.0 (cropped)
- Replacing Chip Wiring with Light: “RibbonCutout1” Infestor / CC BY-SA 4.0 (cropped)
- Optical Sensing with Mid-Infrared Light: “Germanium crystals” Hi-Res Images of Chemical Elements / CC BY 3.0 (cropped)
- Related lab (Yamashita-Set Lab): “Зеркало резонатора волоконного лазера в темноте (Resonator mirror of Er ZBLAN fiber laser and its working fiber in the dark)” Hius1 / CC BY 4.0 (cropped)
- Related lab (Neuromimetic Systems Lab (Kohno Lab)): “Cultured Rat Hippocampal Neuron ( )” ZEISS Microscopy from Germany / CC BY 2.0 (cropped)
- Related lab (Tanemura Lab): “"Lines made with light" - diffraction gratings at the UK ATC ( )” Science and Technology Facilities Council / CC BY-SA 2.0 (cropped)
- Related lab (Yokota Lab): “Strain gauge” Cristian V. / CC BY 4.0 (cropped)
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