Tanabe Photonic Structure Group, Keio University

Since light does not generate Joule heat when transmitted, it offers the ultimate in energy savings. However, there are many difficulties in realizing optical signal processing. One of them is memory, which cannot retain information without "stopping light.

The Tanabe Photonic Structures Laboratory develops light-stopping and light-containment technologies that will bring a breakthrough in optical signal processing research and realize ultra energy-efficient information processing.

Laboratory information session for students to be assigned in March 2025 has started!
Interested students are always welcome to visit the lab!

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Attention! To all bachelor students

Get a taste of the atmosphere of a university laboratory through a part-time experience!

Tanabe Photonic Structure Laboratory
Part-time job wanted!
Research Assistant

Undergraduate students in European and U.S. universities learn about university laboratories by working part-time as Research Assistants / Lab Assistants. In the Tanabe Laboratory for Photonic Structures, we have decided to recruit a part-time general research assistant from inside and outside of the university, so that motivated students can have such an opportunity.

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About our Research

In the Tanabe Photonic Structures Lab.
Exploring the fundamental of light and new applications of light

Replacing conventional electrical signal processing with optical processing can achieve significant energy savings in signal processing, which was not possible before.
We are developing a small container that confines light, called a micro optical resonator to realize an optical LSI.

Latest Research Information

Fabrication of high Q-value single-crystal micro optical resonators by ultra-precision machining

Opening New Possibilities for Resonator Decentralized Control

Broadband parametric light generation using a high-Q single-crystal micro optical resonator

Toward Broadband Wavelength Conversion Devices

Photolithographically fabricated silicon photonic crystal nanocavity photoreceiver with laterally integrated p-i-n diode

Towards a compact monitoring device for optical networks

We are striving for ultimate energy saving using photonic technologies

With light.

Aiming for "Ultimate Energy Conservation

In the Tanabe Photonic Structures Lab.Exploring the fundamental of light and new applications of light

In the Tanabe Photonic Structures Lab.Exploring the fundamental of light and new applications of light

In the Tanabe Photonic Structures Lab.
Exploring the fundamental of light and new applications of light

In the Tanabe Photonic Structures Lab.
Exploring the fundamental of light and new applications of light