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RIKEN Center for Advanced Photonics Terahertz and Infrared Quantum Photonics Research Team

Team Director: Koichiro Tanaka (D.Sc.)

Research Summary

Koichiro Tanak

Our team aims to elucidate the quantum states of materials and the conversion processes of light energy bydeveloping new light sources in the terahertz and infrared regions and making full use of new spectroscopicmethods based on these light sources. In particular, in the terahertz region, we will generate frequency-stabilizedlight and use it to coherently control the quantum state of matter. We will also focus on non-classical light anddevelop new nonlinear spectroscopy and imaging methods that make use of its characteristics, in order to clarifythe true nature of matter that has not been elucidated until now.

Main Research Fields

  • Interdisciplinary Science & Engineering

Related Research Fields

  • Engineering
  • Optical properties of condensed matter
  • Semiconductors
  • Nonlinear optics

Keywords

  • High-harmonic generation
  • Ultra-high field physics
  • Atomic physics
  • Terahertz wave

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.

  • 1. *Katayama, I., Uchida, K., Takashina, K., Kishioka, A., Kaiho, M., Kusaba, S., Tamaki R., Shudo, K., Kitajima, M., Thien Duc Ngo,Nagao, T., Takeda, J., Tanaka, K. Matsunaga, T.:
    "Three-dimensional bonding anisotropy of bulk hexagonal metal titanium demonstrated by high harmonic generation"
    Communications Physics (2024).
  • 2. *Nakano, A., Uchida, K., Tomioka, Y., Takaya, M., Okimoto, U., Tanaka, K,:
    "Dominant role of charge ordering on high harmonic generation in Pr0.6Ca0.4MnO3"
    Physical Review Research (2024).
  • 3. *Uchida, K., Tanaka, K.:
    "High harmonic Mach–Zehnder interferometer for probing sub-laser-cycle electron dynamics in solids"
    Optica 11(8) 1130-1130 (2024).
  • 4. *Arikawa, T., Kim, J., Mukai, T., Nishigami, N., Fujita, M., Nagatsuma, T., Tanaka, K.:
    "Phase-resolved measurement and control of ultrafast dynamics in terahertz electronic oscillators"
    Nature Communications 15(1) (2024).
  • 5. *Takeda, K. S., Uchida, K., Nagai, K., Kusaba, S., Takahashi, S., Tanaka, K.:
    "Ultrafast Electron-Electron Scattering in Metallic Phase of 2H−NbSe2 Probed by High Harmonic Generation" Physical Review Letters (2024).

Related Links

Lab Members

Principal investigator

Koichiro Tanaka
Team Director

Core members

Keisuke Isobe
Senior Research Scientist
Tomoki Hiraoka
Research Scientist

Contact Information

W509, 5F, Cooperation Center,
2-1 Hirosawa, Wako, Saitama

Email: koichiro.tanaka@riken.jp

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