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Ishizaka Lab
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The lab uses measurement techniques that combine light and electrons to uncover the properties of materials.
AboutAbout the lab
Seeing the properties of materials through light and electrons
The Ishizaka Lab develops measurement techniques that combine light (lasers and synchrotron radiation) with electrons, and uses them to clarify the properties of materials and create new functions.
The lab mainly uses photoemission spectroscopy, which analyzes the electrons emitted when light strikes a material and directly reveals properties such as the energy and spin of the electrons inside it.
The lab develops its own state-of-the-art measurement instruments and works closely with researchers who synthesize samples and researchers in theory.
By combining femtosecond lasers with electron diffraction, the lab has also become able to observe ultrafast atomic motion occurring inside materials.
Key terms
- Photoemission spectroscopy
- A method that measures the energy and momentum of electrons inside a material by analyzing the electrons emitted when light strikes it
- Spin-orbit interaction
- An effect arising from relativity in which the spin of an electron (its magnetic property) becomes coupled to its motion
- Phonon
- A wave of collective atomic vibration in a crystal. It plays a role in carrying sound and heat
NewsLab news
A doctoral student received the Outstanding Oral Presentation Award from the Japanese Society of Microscopy
A student received a Student Scholar Award at a conference in the United States
A master's student received the Outstanding Oral Presentation Award from the Japanese Society of Microscopy
A student received a Best Poster Award at WINGS-QSTEP
ResearchResearch themes
The lab develops measurement techniques that combine light (lasers and synchrotron radiation) with electrons (electron spectroscopy and electron diffraction), and uses them to clarify the properties of a wide range of materials and to create new functions. In every theme, the lab develops its own state-of-the-art measurement instruments and carries out joint research with researchers in sample synthesis and the theory of material properties.
*Illustrative imageElectronic states of atomically thin flakes
Atomically thin flakes peeled off with tape, and stacks made by layering them, show properties that the original crystal does not have. The lab observes their electronic states with a micro-focused laser angle-resolved photoemission spectroscopy system that it developed.
*Illustrative imageProperties arising from spin-orbit interaction
The lab studies phenomena such as the Rashba effect, in which spins align through coupling with the motion of electrons. Building on its findings so far, the lab aims to develop materials for spintronics and to explore new physical properties.
*Illustrative imageElectronic states of topological insulators
These are materials whose interior does not conduct electricity while only the surface behaves like a metal. Using angle-resolved photoemission spectroscopy, the lab observes the electronic states of both the surface and the interior, and searches for materials in which electrical conduction on the surface appears more clearly.
*Illustrative imageObserving ultrafast atomic motion
Using time-resolved measurements that combine femtosecond lasers with electron diffraction, the lab observes the ultrafast atomic motion and the generation of phonons that light pulses cause inside materials.
MembersFaculty
The Ishizaka Lab consists of faculty members, visiting researchers, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorIshizaka KyokoPublications ↗
- Assistant ProfessorKenta Hagiwara
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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: “Sample holder in ultrahigh vacuum chamber for angle-resolved photoemission spectroscopy” Ponor / CC BY-SA 4.0 (cropped)
- Electronic states of atomically thin flakes: “PES Hemispherical Analyzer With Electrons And Signs” Ichwarsnur / CC BY-SA 4.0 (cropped)
- Properties arising from spin-orbit interaction: “Dispersion relation of Rashba splitting” Jcuhfehl / CC BY-SA 4.0 (cropped)
- Electronic states of topological insulators: “Rashba-splitted and topological insulator bands” Carlo Zucchetti / Public domain (cropped)
- Observing ultrafast atomic motion: “Al-Cu-Fe-Cr decagonal quasicrystal diffraction pattern” Ldm1954 / CC BY-SA 4.0 (cropped)
- Related lab (Ashihara Lab): “Femtosecond Laser and Pulse Compressor - Optics Lab - INRIM” Giorgio Brida from Torino, Italy / CC BY 2.0 (cropped)
- Related lab (Shimazaki Lab): “Monolayer TMDC structure” 3113Ian / CC BY-SA 3.0 (cropped)
- Related lab (Takahashi Lab): “OPA produced femtosecond UV laser beam” Abdullahkepceoglu / CC BY-SA 4.0 (cropped)
- Related lab (Nakajima Lab): “J-PARC Materials and Life Science Experimental Facility Experimental Hall No. 1 Neutron Instruments” Kestrel / CC BY-SA 4.0 (cropped)
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