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Takahashi Lab
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The lab explores new optical functions of materials using light ranging from terahertz to ultraviolet.
AboutAbout the lab
Probing the dynamics of matter with light
The Takahashi Lab conducts research in condensed matter physics using light.
The lab focuses on the unique properties of materials discovered in recent materials science, and performs state-of-the-art optical measurements from the terahertz range to the ultraviolet.
It aims to pioneer new optical functions and to understand the dynamics, meaning the motions occurring inside materials.
Lab visits are accepted at any time.
Key terms
- Terahertz
- Electromagnetic waves in the frequency range between radio waves and infrared light. One type of light used in this lab's optical measurements.
- Multiferroics
- Materials that simultaneously have magnetic properties and properties such as electric polarization, with the two strongly coupled to each other.
- Electromagnon
- A collective motion of spins (a magnon) that can be driven by the electric field of light.
NewsLab news
Paper on the giant topological magneto-optical effect published in Nat. Commun.
Paper on an insulating skyrmion material accepted by Communications Physics
Giant terahertz photovoltaic effect in a ferroelectric published in Science Advances
A student received the Best Poster Award at the Cryogenic Research Center Research Exchange Meeting
Terahertz photovoltaic effect of electromagnons published in Nat. Commun.
ResearchResearch themes
The interaction between matter and light has always played a major role in the natural sciences, and its concepts continue to evolve. Focusing on the unique properties of materials discovered in recent materials science, the lab uses state-of-the-art optical measurements from the terahertz range to the ultraviolet to pioneer new optical functions and to understand the dynamics inside materials.
*Illustrative imageSpin Dynamics in Multiferroics
The lab studies electromagnons, magnons specific to multiferroics (materials in which magnetism and ferroelectricity are strongly coupled) that can be excited by the electric field of light. The work covers everything from elucidating the fundamental principles to characterizing properties for applications.
*Illustrative imageOptical Magnetoelectric Effects
When the electric and magnetic fields of light act on a material at the same time, optical magnetoelectric effects appear, such as absorption that changes depending on the direction in which the light travels. The lab works on further enhancing these effects using electromagnons and on elucidating their microscopic origin.
*Illustrative imageControl by High-Intensity Terahertz Light
The lab aims to strongly excite electromagnons, which interact strongly with light, using high-intensity terahertz light in order to control magnetic structures efficiently. The lab believes that electrical properties can be controlled at the same time.
*Illustrative imageCharge Motion in Topological Transport
The lab aims to reveal, through optical measurements such as Faraday rotation spectra, the motion of conduction electrons behind unusual transport phenomena such as the quantum Hall effect and the topological Hall effect.
MembersFaculty
The members of the Takahashi Lab consist of faculty, and doctoral, master's, and undergraduate students.As of 2026
- Associate ProfessorYoutarou TakahashiPublications ↗
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: “OPA produced femtosecond UV laser beam” Abdullahkepceoglu / CC BY-SA 4.0 (cropped)
- Spin Dynamics in Multiferroics: “Larmour Precession B spin negativeQ” Bdushaw / CC BY-SA 4.0 (cropped)
- Optical Magnetoelectric Effects: “Magneto optics versus MFM” Temiryazev / CC BY-SA 4.0 (cropped)
- Control by High-Intensity Terahertz Light: “JILA; Radiation Instrument ( )” National Institute of Standards and Technology / Public domain (cropped)
- Charge Motion in Topological Transport: “QHE Filling Factors” Alexander Mayorov / CC BY-SA 3.0 (cropped)
- Related lab (Shimazaki Lab): “Monolayer TMDC structure” 3113Ian / CC BY-SA 3.0 (cropped)
- Related lab (Fukutani Lab): “Photoemission laboratory” Food95 / CC BY-SA 4.0 (cropped)
- Related lab (Ishizaka Lab): “Sample holder in ultrahigh vacuum chamber for angle-resolved photoemission spectroscopy” Ponor / CC BY-SA 4.0 (cropped)
- Related lab (Kofu Lab (KOFU Group)): “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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