Terahertz Sensing and Imaging Research Team

Team Leader

Chiko Otani


Chiko Otani


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otani [at] riken.jp

Terahertz Sensing and Imaging Research Team,
RIKEN Center for Advanced Photonics

519-1399 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-0845 Japan

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Terahertz (THz) wave has the unique characteristics such as the transparency to many soft materials and their spectral absorption features. These characteristics can be utilized for many applications in various scientific and industrial fields. In this team, we are developing novel technology, science and applications in THz sensing and imaging. Especially, we have promoted the research of THz spectroscopy of macromolecules, the challenge to the control of molecular structures and functions by the strong THz fields, and the development of high-sensitivity imaging detectors for the CMB polarization measurements as well as the collaborative research and development for its practical applications.


Interdisciplinary science and engineering, Chemistry, Engineering, Molecular Biology / Genetics


Terahertz science, Terahertz spectroscopy, Terahertz imaging, Terahertz control, Superconducting detector


  1. THz spectroscopy of polymers and the control of molecular structures and functions
  2. Development of high-sensitivity superconducting detectors for CMB polarization observations
  3. Development of ultrafast and ultra-broadband optical-pump THz-probe systems and its applications
  4. Applications of terahertz sensing and imaging

(Left) Fluorescent microscope images of biopolymer (actin filaments).(Right) The number of actin filaments with or without THz irradiation.

Selected Publications

  1. Momiyama, H., Sasaki, Y., Yoshimine, I., Nagano, S., Yuasa, T., Otani, C.: “Depth super-resolved imaging of infrastructures defects using a terahertz-wave interferometer”, NDT&E International, in press (2021).
  2. Yamashita, M., Otani, C.: “Intrinsic and extrinsic effects on intraband optical conductivity of hot carriers in photoexcited graphene”, Physical Review Research 3, 013150 (2021).
  3. Feng, C. H., Otani, C.: “Terahertz Spectroscopy Technology as an Innovative Technique for Food: Current State-of-the-Art Research Advances” , Critical Reviews in Food Science and Nutrition, published online (2020).
  4. Yamazaki, S., Harata, M., Ueno, Y., Tsubouchi, M., Konagaya, K., Ogawa, Y., Isoyama, G., Otani, C., Hoshina, H.: “Propagation of THz irradiation energy through aqueous layers: Demolition of actin filaments in living cells” , Scientific Reports 10, 9008 (2020).
  5. Kutsuma, H., Sueno, Y., Hattori, M., Mima, S., Oguri, S., Otani, C., Suzuki, J., Tajima, O.:“A method to measure superconducting transition temperature of microwave kinetic inductance detector by changing power of readout microwaves” , AIP Advances 10, 095320 (2020).


Chiko OtaniTeam Leader
Masatsugu YamashitaSenior Scientist
Hiromichi HoshinaSenior Scientist
Yoshiaki SasakiTechnical Scientist
Javier Miguel HernandezSpecial Postdoctoral Researcher
Mingxi ChenJunior Research Associate
Yuya UenoJunior Research Associate
Alip Rosalena IrmaVisiting Scientist