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Konishi Lab
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An optical science lab that controls light at will using lasers and artificial structures smaller than the wavelength of light.
AboutAbout the lab
Controlling light with the “shape” of structures
The Konishi Lab studies new physical phenomena that arise from the interaction of light with artificial microstructures smaller than the wavelength of light.
Using state-of-the-art microfabrication technology, the lab builds nanostructures and aims to control light through their “shape.”
The lab also works on creating fine three-dimensional structures with ultrashort-pulse lasers, and on elucidating the principles of laser processing, addressing the question of “why light can destroy materials.”
As part of the University of Tokyo's Institute for Photon Science and Technology, the lab also works on building a system that quickly brings new technologies born from projects to real-world use.
Key terms
- Ultrashort-pulse laser
- A laser that emits extremely intense light for only a very short time, about one trillionth of a second
- Terahertz waves
- Electromagnetic waves between radio waves and light, with a frequency of around one trillion hertz
- Vacuum ultraviolet light
- Ultraviolet light with a wavelength so short that it is absorbed by air, roughly 200 nm or shorter
NewsLab news
A doctoral student won a poster award at the international conference SLIMS 2026
A doctoral student won the Physics of Plasmas Early Career Collection 2025
Associate Professor Konishi wrote the chapter on metamaterials in the book “Todai Butsuri no Arukikata” (A Guide to Physics at the University of Tokyo)
A paper in Light: Science & Applications was selected as one of the most downloaded papers of 2025
Published a paper on an ultra-broadband perfect absorber using a moth-eye structure and a thin carbon film (press release)
ResearchResearch themes
The lab searches for new physical phenomena in the interaction of light with nano- and microscale artificial structures made with state-of-the-art microfabrication technology, and applies them to the control of light. It also studies the development of laser processing technology for this purpose, and investigates how lasers destroy materials.
*Illustrative imageControlling Light with Artificial Nanostructures
In artificial nanostructures far smaller than the wavelength of light, the “shape” of the structure can be used to control how it interacts with light. The lab explores new phenomena and works to clarify the mechanisms behind them, aiming at applications for vacuum ultraviolet light with wavelengths below 200 nm and terahertz waves around 1 THz.
*Illustrative imageFine 3D Structures Made with Lasers
Using ultrashort-pulse laser processing and 3D printers that use laser light, the lab creates fine three-dimensional structures at the micron scale. These structures are being developed as new materials for controlling millimeter waves and terahertz waves, with applications in astrophysics and next-generation wireless technology.
*Illustrative imageWhy Does Light Destroy Materials?
When an intense ultrashort-pulse laser strikes a material, much remains unknown about how the energy of the light is transferred and what triggers the damage. The lab develops state-of-the-art light control technologies and measurement methods to investigate these mechanisms.
MembersFaculty
The Konishi Lab consists of faculty members, project researchers, visiting collaborative researchers, and doctoral and master's students.As of 2026
- Associate ProfessorKuniaki KonishiPublications ↗
- Assistant ProfessorHaruyuki SakuraiPublications ↗
VoicesStudent voices
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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: “Optical Table with doubled Nd-YAG Laser - (1)” Giorgio Brida from Torino, Italy / CC BY 2.0 (cropped)
- Controlling Light with Artificial Nanostructures: “PMMA02” Fdenicola / CC BY-SA 4.0 (cropped)
- Fine 3D Structures Made with Lasers: “Metasurface ( )” National Institute of Standards and Technology / Public domain (cropped)
- Why Does Light Destroy Materials?: “Selenium NPs” Muderkind / CC BY 4.0 (cropped)
- Related lab (相川研究室): “Mirror and Lens setup for laser tweezers” Thctamm / CC BY-SA 3.0 (cropped)
- Related lab (張研究室
（Zhang group） ): “Graphen” AlexanderAlUS / CC BY-SA 3.0 (cropped) - Related lab (中辻・酒井研究室): “FZU AV CR Silicon Single Crystal C” Mojmir Churavy / CC BY-SA 4.0 (cropped)
- Related lab (基本対称性研究室
（Fundamental Symmetry Group） ): “Cold atoms experiment 04” Tomasz Kawalec / CC BY-SA 4.0 (cropped)
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