1. Giant antisymmetric magnetoresistance arising across optically controlled domain walls in the magnetic Weyl semimetal Co3Sn2S2

Kohei Fujiwara, Kazuma Ogawa, Naotaka Yoshikawa, Koji Kobayashi, Kentaro Nomura, Ryo Shimano & Atsushi Tsukazaki 

Commun. Mater. 5, 239 (2024).

2. Floquet Weyl states at one-photon resonance: An origin of nonperturbative optical responses in three-dimensional materials

Yoshua Hirai, Shun Okumura, Naotaka Yoshikawa, Takashi Oka, and Ryo Shimano

Phys. Rev. Research 6, L012027 (2024).

3. Ultrafast stroboscopic time-resolved magneto-optical imaging of domain wall motion in Pt/GdFeCo wires induced by a current pulse

Kazuma Ogawa, Naotaka Yoshikawa, Mio Ishibashi, Kay Yakushiji, Arata Tsukamoto, Masamitsu Hayashi, and Ryo Shimano

Phys. Rev. Research 5, 033151 (2023).

4. Ultrafast Dynamics of Intrinsic Anomalous Hall Effect in the Topological Antiferromagnet Mn3Sn

Takuya Matsuda, Tomoya Higo, Takashi Koretsune, Natsuki Kanda, Yoshua Hirai, Hanyi Peng, Takumi Matsuo, Naotaka Yoshikawa, Ryo Shimano, Satoru Nakatsuji, and Ryusuke Matsunaga

Phys. Rev. Lett. 130, 126302 (2023).

5. Anomalous Hall effect of light-driven three-dimensional Dirac electrons in bismuth

Yoshua Hirai, Naotaka Yoshikawa, Masashi Kawaguchi, Masamitsu Hayashi, Shun Okumura, Takashi Oka, Ryo Shimano

arXiv:2301.06072.

6. Non-volatile chirality switching by all-optical magnetization reversal in ferromagnetic Weyl semimetal Co3Sn2S2

Naotaka Yoshikawa†, Kazuma Ogawa†, Yoshua Hirai, Kohei Fujiwara, Junya Ikeda, Atsushi Tsukazaki, & Ryo Shimano

Communications Physics 5, 328 (2022)., プレスリリース

7. Light-induced chiral gauge field in a massive 3D Dirac electron system

Naotaka Yoshikawa, Yoshua Hirai, Kazuma Ogawa, Shun Okumura, Kohei Fujiwara, Junya Ikeda, Takashi Koretsune, Ryotaro Arita, Aditi Mitra, Atsushi Tsukazaki, Takashi Oka, Ryo Shimano

arXiv:2209.11932.

8. Light-induced enhancement of superconductivity in iron-based superconductor FeSe0.5Te0.5

Kazuki Isoyama, Naotaka Yoshikawa, Kota Katsumi, Jeremy Wong, Naoki Shikama, Yuki Sakishita, Fuyuki Nabeshima, Atsutaka Maeda & Ryo Shimano

Communications Physics 4, 160 (2021).

9. Ultrafast switching to an insulating-like metastable state by amplitudon excitation of a charge density wave

Naotaka Yoshikawa, Hiroki Suganuma, Hideki Matsuoka, Yuki Tanaka, Pierre Hemme, Maximilien Cazayous, Yann Gallais, Masaki Nakano, Yoshihiro Iwasa & Ryo Shimano

Nature Physics 17, 909 (2021)., プレスリリース

10. Switchable generation of azimuthally- and radially-polarized terahertz beams from a spintronic terahertz emitter

Hiroaki Niwa, Naotaka Yoshikawa, Masashi Kawaguchi, Masamitsu Hayashi, and Ryo Shimano

Opt. Express 29, 13331 (2021).

11. Terahertz Emission from Bismuth Thin Films Induced by Excitation with Circularly Polarized Light

Yoshua Hirai, Naotaka Yoshikawa, Hana Hirose, Masashi Kawaguchi, Masamitsu Hayashi, and Ryo Shimano

Phys. Rev. Applied 14, 064015 (2020).

12. Dynamical symmetry of strongly light-driven electronic system in crystalline solids

K. Nagai, K. Uchida, N. Yoshikawa, Takahiro Endo, Yasumitsu Miyata, K. Tanaka

Communications Physics 3, 137 (2020).

13. Phase-resolved Higgs response in superconducting cuprates

Hao Chu, Min-Jae Kim, Kota Katsumi, Sergey Kovalev, Robert David Dawson, Lukas Schwarz, Naotaka Yoshikawa, Gideok Kim, Daniel Putzky, Zhi Zhong Li, Hélène Raffy, Semyon Germanskiy, Jan-Christoph Deinert, Nilesh Awari, Igor Ilyakov, Bertram Green, Min Chen, Mohammed Bawatna, Georg Christiani, Gennady Logvenov, Yann Gallais, Alexander V. Boris, Bernhard Keimer, Andreas Schnyder, Dirk Manske, Michael Gensch, Zhe Wang, Ryo Shimano, Stefan Kaiser

Nature Communications 11, 1793 (2020).

14. Inherent limit to coherent phonon generation under nonresonant light-field driving

K. Uchida, K. Nagai, N. Yoshikawa, K. Tanaka

Phys. Rev. B 101, 094301 (2019).

15. Light-induced nonequilibrium response of the superconducting cuprate La2−xSrxCuO4

Hiroaki Niwa, Naotaka Yoshikawa, Kaito Tomari, Ryusuke Matsunaga, Dongjoon Song, Hiroshi Eisaki, Ryo Shimano

Phys. Rev. B 100, 104507 (2019).

16. Interband resonant high-harmonic generation by valley polarized electron-hole pairs

Naotaka Yoshikawa, Kohei Nagai, Kento Uchida, Yuhei Takaguchi, Shogo Sasaki, Yasumitsu Miyata, Koichiro Tanaka

Nature Communications 10, 3709 (2019).

17. Charge carrier dynamics of FeSe thin film investigated by terahertz magneto-optical spectroscopy

Naotaka Yoshikawa, Masayuki Takayama, Naoki Shikama, Tomoya Ishikawa, Fuyuki Nabeshima, Atsutaka Maeda, Ryo Shimano

Phys. Rev. B 100, 035110 (2019).

18. Coexistence of Kosmotropic and Chaotropic Impacts of Urea on Water As Revealed by Terahertz Spectroscopy

Keiichiro Shiraga, Yuichi Ogawa, Koichiro Tanaka, Takashi Arikawa, Naotaka Yoshikawa, Masahito Nakamura, Katsuhiro Ajito, and Takuro Tajima

J. Phys. Chem. B, 122 (3), 1268 (2018).

19. High-harmonic generation in graphene enhanced by elliptically polarized light excitation

Naotaka Yoshikawa, Tomohiro Tamaya, Koichiro Tanaka

Science 356, 736 (2017)., プレスリリース

20. Raman-like resonant secondary emission causes valley coherence in CVD-grown monolayer MoS2

Naotaka Yoshikawa, Shuntaro Tani, and Koichiro Tanaka

Phys. Rev. B 95, 115419 (2017).

21. Biexciton state causes photoluminescence fluctuations in CdSe/ZnS core/shell quantum dots at high photoexcitation densities

N. Yoshikawa, H. Hirori, H. Watanabe, T. Aoki, T. Ihara, R. Kusuda, C. Wolpert, T. K. Fujiwara, A. Kusumi, Y. Kanemitsu, and K. Tanaka

Phys. Rev. B 88, 155440 (2013).

1. Floquet Engineering of 3-Dimensional Dirac Semimetals

Ryo Shimano, Yoshua Hirai, Naotaka Yoshikawa

Nonlinear Optics 2023, Tu1B.1.

2. Helicity-dependent terahertz-wave emission from the Dirac electrons in bismuth

Y. Hirai, N. Yoshikawa, H. Hirose, M. Kawaguchi, M. Hayashi, R. Shimano

Proceedings Volume 12205, Spintronics XV; 1220502 (2022).

3. Amplitude mode-driven ultrafast transition into a hidden state in a thin film of transition metal dichalcogenide

Ryo Shimano, Naotaka Yoshikawa

Proceedings Volume 11999, Ultrafast Phenomena and Nanophotonics XXVI; 119990B (2022).

4. Terahertz pulse-induced melting of charge density wave through the coherent excitation of amplitude mode in 3R-Ta1+xSe2

Naotaka Yoshikawa, Ushio Narusaka, Kunio Nishizawa, Hideki Matsuoka, Yuki Tanaka, Masaki Nakano, Yoshihiro Iwasa, and Ryo Shimano

Frontiers in Optics + Laser Science, LTu2F. 3

5. Generation of radially- and azimuthally-polarized terahertz cylindrical vector beams from spintronic terahertz emitter

Hiroaki Niwa, Naotaka Yoshikawa, Masashi Kawaguchi, Masamitsu Hayashi, and Ryo Shimano

The European Conference on Lasers and Electro-Optics, cc_4_6

6. High-Order Sideband Generation Under Circularly Polarized Light Excitation in Monolayer Transition Metal Dichalcogenides

Kohei Nagai, Naotaka Yoshikawa, Koichiro Tanaka

Proceedings of the 43rd International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) (2018).

1. 「固体における極端非線形光学　ー高次高調波発生の光物性ー」

田中耕一郎、吉川尚孝、内田健人、永井恒平

固体物理＜高強度テラヘルツ・赤外パルスが拓く非平衡物性＞特集号, vol. 54, pp 673-692