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RIKEN Center for Advanced Photonics Tera-Photonics Research Team

Team Leader: Hiroaki Minamide (D.Eng.)

Research Summary

Hiroaki  Minamide(D.Eng.)

Our team develops state-of-the-art frequency-tunable THz-wave sources which exploit new THz-wave application fields. A nonlinear optical process is utilized for realizing the THz-wave source which lights up the THz-wave gray zone, and our original design and method will be demonstrated. We develop THz sources with high output, wide tunability, high stability and narrow linewidth.

Active collaboration with both internal and external research groups is carried out for exploring new applications by development of instrument combined with new THz-wave sources. Advanced THz-wave technologies are also being developed in cooperation with industry to establish practical THz-wave sources and technologies in the world.

Main Research Fields

  • Engineering

Related Research Fields

  • Interdisciplinary Science & Engineering


  • Development of kilo-watt-power Terahertz-wave source
  • Sensitive Terahertz-wave detection
  • Terahertz-wave applications
  • Nondestructive measurements
  • Nonlinear optics

Selected Publications

  • 1. Notake, T., Iyoda, T., Arikawa, T., Tanaka, K., Otani, C., and Minamide, H.:
    "Dynamical visualization of anisotropic electromagnetic re-emissions from a single metal micro-helix at THz frequencies"
    Scientific Reports 11, Article number: 3310, pp. 1-7 (2021).
  • 2. Takida,* Y., Nawata,* K., and Minamide, H.:
    "Security screening system based on terahertz-wave spectroscopic gas detection"
    Opt. Express Vol. 29 Issue 2, pp. 2529-2537 (2021). (*equal contribution)
  • 3. Han, Z., Ohno, S., and Minamide, H.:
    "Spectral phase singularity in a transmission-type double-layer metamaterial"
    Optica Vol. 7 No. 12, pp.1721-1728 (2020).
  • 4. Takida, Y., Suzuki S., Asada M., and Minamide H.:
    "Sensitive terahertz-wave detector responses originated by negative differential conductance of resonant-tunneling-diode oscillator"
    Appl. Phys. Lett. Vol. 117 Issue 2, 021107 (2020).
  • 5. Takida, Y., Nawata, K., and Minamide, H.:
    "Injection-seeded backward terahertz-wave parametric oscillator"
    APL Photonics Vol. 5 Issue 6, 061301 (2020).
  • 6. Huang, Y., Kosugi, A., Naito,Y., Takida,Y., Minamide, H., Hane, K., and Kanamori, Y.:
    "Improvement in THz light extraction efficiencies with antireflection subwavelength gratings on a silicon prism"
    Jpn. J. Appl. Phys., Vol. 60, No. SC, SCCL04, Mar. (2021).
  • 7. Ohno, S., Tokizane,Y., Shikata, J., Minamide, H.:
    "Phase and Direction Control of a Terahertz Wave Propagating in a Waveguide Coupled With a Bull’s-Eye Structure,"
  • 8. Huang, Y., Nakamura, K., Takida,Y., Minamide, H., Hane, K., and Kanamori, Y.:
    "Actively tunable THz filter based on electromagnetically induced transparency analog hybridized with a MEMS metamaterial"
    Sci. Rep. 10, 20807 30. Nov. (2020).
  • 9. Takeda, H., Yoshioka, H., Minamide, H., Oki, Y., Aadachi, C.:
    "0.5–4.5 THz band terahertz spectroscopy of thermally activated delayed fluorescence molecules,"
    Optics Communications, Vol. 476 Article Number: 126339, pp1-8, Dec. (2020).
  • 10. Shikata, J., Ohno, S., and Minamide, H.:
    "Terahertz-wave generation from surface phonons at forbidden frequencies of lithium niobate"
    IEICE Electron. Expr., Vol. 17, No. 11, pp.1-5 (2020).

Recent Research Results

Related Links

Lab Members

Principal investigator

Hiroaki Minamide
Team Leader

Core members

Takashi Notake
Research Scientist
kouji Nawata
Research Scientist
Yuma Takida
Research Scientist

Contact Information

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

Email: minamide [at] riken.jp