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Extreme Electronics Lab
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A lab exploring vacuum nanoelectronics and measurement at the nanoscale.

AboutAbout the lab
Exploring electron emission and nanoscale measurement.
The Extreme Electronics Lab studies vacuum nanoelectronics, which investigates electron emission, and nanoscale measurement using magnetic force microscopy.
The lab works on the electron emission properties of graphene and high-temperature superconductors, and on developing compact X-ray and neutron sources that use pyroelectric crystals irradiated with laser light.
It also works on measuring the resistance of narrow regions of semiconductors using magnetic force microscopy.
On the lab's website, it is introduced under the name "Wakaya Group," as a lab of the Center for Extreme Science, affiliated with the Graduate School of Engineering Science.
Key terms
- Graphene
- A sheet-like material made of carbon atoms arranged flat, with a thickness of a single atomic layer
- Pyroelectric crystal
- A crystal whose surface becomes electrically charged when its temperature changes
- Magnetic force microscope
- A microscope that scans a surface with a thin magnetic tip and examines the surface from the magnetic force acting on the tip
NewsLab news
A paper on measuring resistivity with magnetic force microscopy was published in Japanese Journal of Applied Physics
A master's student received the 59th Young Scientist Presentation Award from the Japan Society of Applied Physics
A paper on a graphene-based electron source was published in Japanese Journal of Applied Physics
A paper on resistivity measurement using magnetic force microscopy has been accepted for publication in Japanese Journal of Applied Physics
ResearchResearch themes
The Extreme Electronics Lab's research themes are vacuum nanoelectronics and the integration of nanoelectronics and mechanics. The lab works on electron emission from graphene, high-temperature superconductors, and pyroelectric crystals, as well as measurement using magnetic force microscopy.
*Illustrative imageElectron emission from graphene electron sources
The lab investigates the electron emission properties of electron sources with a layered structure of graphene, an insulator, and a semiconductor. Its research on improving the monochromaticity of the emitted electrons (how uniform their energies are) by using electron interference in the graphene layer has been published as a paper.
*Illustrative imageElectron emission from high-temperature superconductors
The lab investigates the electron emission properties of high-temperature superconductors. It has published research on improving the monochromaticity of the emitted electrons and on differences depending on crystal orientation.
*Illustrative imageX-ray and neutron sources using pyroelectric crystals
This research uses pyroelectric crystals irradiated with laser light as electron and ion sources, and applies them to X-ray and neutron sources. The development of a fingertip-sized compact X-ray source and of a compact neutron source has been published as papers.
*Illustrative imageMeasuring semiconductor resistance with magnetic force microscopy
This research uses magnetic force microscopy to measure the local resistance of semiconductors (local impurity concentration). Related to this, a paper has been published on increasing sensitivity by vibrating the sample when measuring the resistivity of nonmagnetic materials.
MembersFaculty
The Extreme Electronics Lab's members consist of faculty and master's and undergraduate students.As of 2026
- Associate ProfessorFujio Wakaya
- Assistant ProfessorSatoshi Abo
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: “Vacuum chamber-being opened by engineer” NASA JPL-Caltech / Public domain (cropped)
- Electron emission from graphene electron sources: “Molecular Modeling ( )” National Institute of Standards and Technology / Public domain (cropped)
- Electron emission from high-temperature superconductors: “YBCO superconductor” Maxim Bilovitskiy / CC BY-SA 4.0 (cropped)
- X-ray and neutron sources using pyroelectric crystals: “Interior of Spallation Neutron Source ( )” doe-oakridge / Public domain (cropped)
- Measuring semiconductor resistance with magnetic force microscopy: “Atomic force microscope by Zureks” Zureks / CC BY-SA 3.0 (cropped)
- Related lab (Strongly Correlated Systems Theory Lab): “Levitation meissner” Julien Bobroff (user:Jubobroff), Frederic Bouquet (user:Fbouquet), LPS, Orsay, France / CC BY-SA 3.0 (cropped)
- Related lab (Strongly Correlated Systems Spectroscopy Lab): “Aust.-Synchrotron,-Storage-Ring-Magnets” jjron / CC BY-SA 3.0 (cropped)
- Related lab (Strongly Correlated Quantum Physics Lab): “Dilution Fridge in 16K Resolution 002” OJB Quantum / CC BY 4.0 (cropped)
- Related lab (Functional Characterization of Strongly Correlated Materials Lab): “Superconducting magnet cutaway” Hzofia74 / CC BY 4.0 (cropped)
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