Papers（論文）

2025

• Ultrafast modulation of the anomalous Hall conductivity by coherent magnetization precession in Co-Pt thin films
  Z. Zhang, Y. Shiota, S. Karube, Y. Watanabe, T. Ono, and H. Hirori
  Phys. Rev. Applied 24, 044079 (8 pages) (2025). 
  (DOI: https://doi.org/10.1103/4p39-gyrd) 
• Reaching the nonlinear spin-dynamics regime in antiferromagnets using terahertz pulses
  Z. Zhang, H. Watanabe, and H. Hirori
  J. Phys. Soc. Jpn. 94, 111006 (8 pages) (2025). (Invited review paper) 
  (DOI: 10.7566/JPSJ.94.111006)
  京都大学学術情報リポジトリ 紅 (PDF)　
  同誌のPrefaceにて紹介 (PDF, Video)　
• Time resolution of terahertz scanning tunneling microscopy measurements inside a superconducting magnet using a hollow waveguide
  T. Tachizaki, Y. Kanemitsu, and H. Hirori
  Rev. Sci. Instrum. 96, 043004 (6 pages) (2025).
  (DOI: 10.1063/5.0247691)
• Spin switching in Sm_0.7Er_0.3FeO₃ triggered by terahertz magnetic-field pulses
  Z. Zhang, M. Kanega, K. Maruyama, T. Kurihara, M. Nakajima, T. Tachizaki, M. Sato, Y. Kanemitsu, and H. Hirori
  Nature Mater. 24, 219–225 (2025).
  (DOI: 10.1038/s41563-024-02034-4) (News & Views)
  京都大学学術情報リポジトリ 紅 (PDF)

2024 and earlier

• Hot electron effect in high-order harmonic generation from graphene driven by elliptically polarized light
  K. Nakagawa, W. Mao, S. A. Sato, H. Ago, A. Rubio, Y. Kanemitsu, and H. Hirori
  APL Photonics 9, 076107 (8 pages) (2024).
  (DOI: 10.1063/5.0212022)
• Anomalous behavior of critical current in a superconducting film triggered by DC plus terahertz current
  F. Sekiguchi, H. Narita, H. Hirori, T. Ono, and Y. Kanemitsu
  Nature Commun. 15, 4435 (8 pages) (2024).
  (DOI: 10.1038/s41467-024-48738-8)
• Tesla-class single-cycle terahertz magnetic field pulses generated with a spiral-shaped metal microstructure
  K. Maruyama, Z. Zhang, M. Takumi, T. Satoh, M. Nakajima, Y. Kanemitsu, and H. Hirori
  Appl. Phys. Express 17, 022004 (6 pages) (2024).
  (DOI: 10.35848/1882-0786/ad2909) (Spotlights 2024)
• High-Order Harmonic Generation in Solids: The Role of Intraband Transitions in Extreme Nonlinear Optics
  H. Hirori, S. A. Sato, and Y. Kanemitsu
  J. Phys. Chem. Lett. 15, 2184–2192 (2024).
  (DOI: 10.1021/acs.jpclett.3c03415) (Review)
• Enhancing high harmonic generation in GaAs by elliptically polarized light excitation
  F. Sekiguchi, M. Sakamoto, K. Nakagawa, H. Tahara, S. A. Sato, H. Hirori, and Y. Kanemitsu
  Phys. Rev. B 108, 205201 (9 pages) (2023).
  (DOI: 10.1103/PhysRevB.108.205201) (Editors’ Suggestion)
• Generation of third-harmonic spin oscillation from strong spin precession induced by terahertz magnetic near fields
  Z. Zhang, F. Sekiguchi, T. Moriyama, S. C. Furuya, M. Sato, T. Satoh, Y. Mukai, K. Tanaka, T. Yamamoto, H. Kageyama, Y. Kanemitsu, and H. Hirori
  Nature Commun. 14, 1795 (7 pages) (2023).
  (DOI: 10.1038/s41467-023-37473-1)
• Mid-infrared pulse generation using multi-plate white-light generation and optical parametric amplification in LiGaS₂ crystals
  K. Nakagawa, N. Ishii, Y. Kanemitsu, and H. Hirori
  Appl. Phys. Express 16, 032001 (5 pages) (2023).
  (DOI: 10.35848/1882-0786/acbd83)
• Polarization anomaly in high harmonics in the crossover region between perturbative and extreme nonlinearity in GaAs
  F. Sekiguchi, G. Yumoto, H. Hirori, and Y. Kanemitsu
  Phys. Rev. B 106, L241201 (6 pages) (2022).
  (DOI: 10.1103/PhysRevB.106.L241201)
• Size-controlled quantum dots reveal the impact of intraband transitions on high-order harmonic generation in solids
  K. Nakagawa, H. Hirori, S. A. Sato, H. Tahara, F. Sekiguchi, G. Yumoto, M. Saruyama, R. Sato, T. Teranishi, and Y. Kanemitsu
  Nat. Phys. 18, 874-878 (2022).
  (DOI: 10.1038/s41567-022-01639-3) (News & Views)

• Generation of wavelength-tunable few-cycle pulses in the mid-infrared at repetition rates up to 10 kHz
  Y. Sanari, F. Sekiguchi, K. Nakagawa, N. Ishii, Y. Kanemitsu, and H. Hirori
  Opt. Lett. 46, 5280-5283 (2021).
  (DOI: 10.1364/OL.440228)
• Ultrastrong coupling between THz phonons and photons caused by an enhanced vacuum electric field
  Z. Zhang, H. Hirori, F. Sekiguchi, A. Shimazaki, Y. Iwasaki, T. Nakamura, A. Wakamiya, and Y. Kanemitsu
  Phys. Rev. Research 3, L032021 (6 pages) (2021).
  (DOI: 10.1103/PhysRevResearch.3.L032021)
• On the progress of ultrafast time-resolved THz scanning tunneling microscopy
  T. Tachizaki, K. Hayashi, Y. Kanemitsu, and H. Hirori
  APL Mater. 9, 060903 (7 pages) (2021).
  (DOI: 10.1063/5.0052051)
• Strong spin-orbit coupling inducing Autler-Townes effect in lead halide perovskite nanocrystals
  G. Yumoto, H. Hirori, F. Sekiguchi, R. Sato, M. Saruyama, T. Teranishi, and Y. Kanemitsu
  Nature Commun. 12, 3026 (7 pages) (2021).
  (DOI: 10.1038/s41467-021-23291-w)
• Enhancing the hot-phonon bottleneck effect in a metal halide perovskite by terahertz phonon excitation
  F. Sekiguchi, H. Hirori, G. Yumoto, A. Shimazaki, T. Nakamura, A. Wakamiya, and Y. Kanemitsu
  Phys. Rev. Lett. 126, 077401 (6 pages) (2021).
  (DOI: 10.1103/PhysRevLett.126.077401)
• High-order harmonic generation in graphene: Nonlinear coupling of intra- and interband transitions
  S. A. Sato, H. Hirori, Y. Sanari, Y. Kanemitsu, and A. Rubio
  Phys. Rev. B 103, L041408 (6 pages) (2021).
  (DOI: 10.1103/PhysRevB.103.L041408)
• Interference effects in high-order harmonics from colloidal perovskite nanocrystals excited by an elliptically polarized laser
  K. Nakagawa, H. Hirori, Y. Sanari, F. Sekiguchi, R. Sato, M. Saruyama, T. Teranishi, and Y. Kanemitsu
  Phys. Rev. Materials 5, 016001 (6 pages) (2021).
  (DOI: 10.1103/PhysRevMaterials.5.016001)
• Terahertz Scanning Tunneling Microscopy for Visualizing Ultrafast Electron Motion in Nanoscale Potential Variations
  S. Yoshida, Y. Arashida, H. Hirori, T. Tachizaki, A. Taninaka, H. Ueno, O. Takeuchi, and H. Shigekawa
  ACS Photonics 8, 315-323 (2021).
  (DOI: 10.1021/acsphotonics.0c01572)
• Terahertz pulse-altered gene networks in human induced pluripotent stem cells
  T. Tachizaki, R. Sakaguchi, S. Terada, K. Kamei, and H. Hirori
  Opt. Lett. 45, 6078-6081 (2020).
  (DOI: 10.1364/OL.402815)

• Role of virtual band population for high harmonic generation in solids
  Y. Sanari, H. Hirori, T. Aharen, H. Tahara, Y. Shinohara, K. L. Ishikawa, T. Otobe, P. Xia, N. Ishii, J. Itatani, S. A. Sato, and Y. Kanemitsu
  Phys. Rev. B 102, 041125(R) (7 pages) (2020).
  (DOI: 10.1103/PhysRevB.102.041125)
• Modifying angular and polarization selection rules of high-order harmonics by controlling electron trajectories in k-space
  Y. Sanari, T. Otobe, Y. Kanemitsu, and H. Hirori
  Nature Commun. 11, 3069 (7 pages) (2020).
  (DOI: 10.1038/s41467-020-16875-5)