RIKEN Center for Emergent Matter Science Emergent Photodynamics Research Group
Group Director: Naoki Ogawa (Ph.D.)
Research Summary
Our team explores novel photodynamics of electron/spin/lattice in bulk crystals and at thin-film interfaces emerging via electron-correlation, strong spin-orbit interaction, and topology. Examples are ultrafast spectroscopy on shift/injection current, generation of spin current mediated by Dirac/Weyl electrons, and manipulation of topological magnetic textures. With a strong command of photons, we try to realize new photo-electric/magnetic effects in solids, and visualize spatiotemporal propagation of various elemental excitations at the sub-diffraction limit.
Main Research Fields
- Mathematical & Physical Sciences
Related Research Fields
- Condensed matter physics
Keywords
- Optical properties of condensed matter
Selected Publications
- 1.
Wang, Z., Wang, M., Lehmann, J., Shiomi, Y., Arima, T., Nagaosa, N., Tokura, Y., and Ogawa, N.,
"Electric-field-enhanced second-harmonic domain contrast and nonreciprocity in a van der Waals antiferromagnet"
Nature Commun. 15, 7542 (2024) - 2.
Wang, Z., Zhang, X.-X., Shiomi, Y., Arima, T., Nagaosa, N., Tokura, Y., and Ogawa, N.,
"Exciton-magnon splitting in van der Waals antiferromagnet MnPS3 unveiled by second-harmonic generation"
Phys. Rev. Res. 5, L042032 (2023) - 3.
Toyoda, S., Liao, J.-C., Guo, G.-Y., Tokunaga, Y., Arima, T., Tokura, Y., and Ogawa, N.,
"Magnetic-field switching of second harmonic generation in noncentrosymmetric magnet Eu2MnSi2O7"
Phys. Rev. Mater. 7, 024403 (2023) - 4.
Wang, Z., Gao, M., Yu, T., Zhou, S., Xu, M., Hirayama, M., Arita, R., Shiomi, Y., Zhou, W., and Ogawa, N.,
"Real-Space Observation of Ripple-Induced Symmetry Crossover in Ultrathin MnPS3"
ACS Nano 17, 1916-1924 (2023) - 5.
Toyoda, S., Yamada, R., Kaneko, Y., Tokura, Y., and Ogawa, N.,
"Weyl fermions in SrRuO3 detected by Brillouin light scattering"
Appl. Phys. Lett. 120, 242408 (2022) - 6.
Toyoda, S., Fiebig, M., Forster, L., Arima, T., Tokura, Y., and Ogawa, N.,
"Writing of strain-controlled multiferroic ribbons into MnWO4“
Nature Commun. 12, 6199 (2021) - 7.
Toyoda, S., Fiebig, M., Arima, T., Tokura, Y., and Ogawa, N.,
"Nonreciprocal second harmonic generation in a magnetoelectric material"
Sci. Adv. 7, eabe2793 (2021) - 8.
Ogawa, N. Köhler, L., Garst, M., Toyoda, S., Seki, S., and Tokura, Y.,
"Nonreciprocity of spin-waves in the conical helix state"
Proc. Natl. Acad. Sci. 118, e2022927118 (2021) - 9.
Sotome, M., Nakamura, M., Fujioka, J., Ogino, M., Kaneko, Y., Morimoto, T., Zhang, Y., Kawasaki, M., Nagaosa, N., Tokura, Y., and Ogawa, N.,
"Spectral dynamics of shift-current in ferroelectric semiconductor SbSI"
Proc. Natl. Acad. Sci. 116, 1929 (2019) - 10.
Ogawa, N., Yoshimi, R., Yasuda, K., Tsukazaki, A., Kawasaki, M., and Tokura, Y.,
"Zero-bias photocurrent in ferromagnetic topological insulator"
Nature Commun. 7, 12246 (2016)
Recent Research Results
Feb. 14, 2025
Shining a light on magnetic structure
Sep. 25, 2015
A magnetic memory bubbling with opportunity
Related Links
Lab Members
Principal investigator
- Naoki Ogawa
- Group Director
Core members
- Shingo Toyoda
- Research Scientist
- Manfred Fiebig
- Senior Visiting Scientist
- Tsubasa Takagi
- Junior Research Associate
Careers
| Position | Deadline |
|---|---|
| Seeking a Postdoctoral Researcher (W23335) | Open until filled |
Contact Information
Frontier Research Laboratory,
2-1 Hirosawa,
Wako, Saitama
351-0198, Japan
Email: naoki.ogawa@riken.jp