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Extreme Electronic Functionality Lab
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The lab takes on the mysteries of superconductivity and magnetism that emerge when electrons come together.
AboutAbout the lab
Exploring new properties that emerge when particles come together
The Extreme Electronic Functionality Lab (Yonezawa Lab) studies emergent phenomena that arise when many of the particles that make up matter come together, such as superconductivity, magnetism, terahertz oscillation, and field emission.
The lab aims to discover and understand fundamental physical phenomena and their functionality, and to create innovative technologies based on them.
Two subgroups, the Superconductivity Group and the Vacuum Electronics Group, carry out research and education in collaboration.
In FY2026, the lab changed its name from the Integrated Functional Engineering Lab.
Key terms
- Superconductivity
- A phenomenon in which electrical resistance drops to zero when a material is cooled below a certain temperature
- Strongly correlated electron system
- A material in which electrons strongly influence one another and show properties that cannot be predicted from individual electrons
- Field emitter array
- An array of micron-sized electron sources that emit electrons into a vacuum from sharp electrodes; a modern version of the vacuum tube
NewsLab news
View More ↗ResearchResearch themes
The lab studies the physical properties of materials such as superconductors and magnetic materials and the development of devices, as well as high-electric-field science and applications of charged-particle devices. Through experiments in extreme environments, measurements with extreme sensitivity, and devices with extreme performance, the lab aims to turn functionality into social value.
*Illustrative imageSuperconductivity and magnetism in strongly correlated electron systems
In strongly correlated electron systems, where electrons strongly influence one another, a wide variety of phenomena such as superconductivity and magnetism arise. The lab discovers these phenomena, understands them in simple terms through physics, and brings out the potential of materials that could lead to next-next-generation devices.
*Illustrative imageObserving the properties of magnets in strong magnetic fields
In pulsed magnetic fields exceeding 40 tesla, the lab succeeded in measuring the magneto-optical Kerr effect in just 2 milliseconds, revealing the properties of magnets. The lab is developing a new method for measuring physical properties using optical technology.
*Illustrative imageVacuum electronic devices that work in harsh environments
The lab studies field emitter arrays, micron-sized "modern vacuum tubes." They are expected to operate even under intense radiation, and the lab aims to develop electronic devices for use in the decommissioning of nuclear reactors, accelerator facilities, space, and more.
MembersFaculty
The faculty of the Extreme Electronic Functionality Lab are Professor Shingo Yonezawa, Associate Professors Yasuhito Gotoh, Itsuhiro Kakeya, and Ryota Akiyama, and Assistant Professor Atsutoshi Ikeda.
- ProfessorShingo Yonezawa
- Associate ProfessorYasuhito Gotoh
- Associate ProfessorItsuhiro Kakeya
- Associate ProfessorRyota Akiyama
- Assistant ProfessorAtsutoshi Ikeda
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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: “Magnet 4” Peter nussbaumer / CC BY-SA 3.0 (cropped)
- Superconductivity and magnetism in strongly correlated electron systems: “Crystal structure of niobium dioxide (NbO₂)” ThomasVJ37 / CC BY-SA 4.0 (cropped)
- Observing the properties of magnets in strong magnetic fields: “Jet Propulsion Laboratory 100 Kilogauss Magnet kmagnet-600” NASA / Public domain (cropped)
- Vacuum electronic devices that work in harsh environments: “EA52 vacuum tube diode” Mister rf / CC BY-SA 4.0 (cropped)
- Related lab (デバイスプロセス工学): “Unmetallised Silicon Heterojunction solar cell precursor” Radiotrefoil / CC BY-SA 4.0 (cropped)
- Related lab (超伝導工学): “Levitation superconductivity” Julien Bobroff, Frederic Bouquet, LPS, Orsay, France / CC BY-SA 3.0 (cropped)
- Related lab (光量子情報工学): “FMN Lab single photon detector” FMNLab / CC BY 4.0 (cropped)
- Related lab (固体量子物性工学): “MTJ with Transparent Background” OJB Quantum / CC BY 4.0 (cropped)
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