Centers & Labs

Chief Scientist Laboratories

Metamaterials Laboratory

Chief Scientist: Takuo Tanaka (D.Eng.)
Takuo  Tanaka(D.Eng.)

In the past, it has been believed that the electro-magnetic properties of materials are determined by the intrinsic property of the materials itself and no one can alter them. In this research laboratory, we are intensively investigating the breakthrough science and technologies that can artificially control the optical properties of the materials by using metal nano-structures. This technology can create unprecedented optical materials such that it can interact directly with the magnetic components of the light, in which the refractive index can be zero, negative or tremendously giant values. We collectively call these kinds of artificial materials - "metamaterials". We will also extend the application of metamaterials to develop novel and functional optical devices that will open a door for new photonic technologies.

Main Research Field


Related Research Fields

Interdisciplinary science and engineering

Optical engineering, Photon science / Nanomaterials engineering


  • Metamaterials
  • Nanophotonics
  • Plasmonics
  • Applied Optics

Selected Publications

  1. Yokota, Y., Ueno, K., Misawa, H., and Tanaka T.:
    "Spectroscopic Properties of Gold Curvilinear Nanorod Arrays,"
    Photonics 3, 18 (2016).
  2. Abumazwed, A., Kubo, W., Shen, C., Tanaka, T., and Kirk A. G.:
    "Projection method for improving signal to noise ratio of localized surface plasmon resonance biosensors"
    Biomedical Optics Express 8, 1, pp. 446-459 (2016).
  3. Ishikawa, A., and Tanaka, T.:
    "Metamaterial Absorbers for Infrared Detection of Molecular Self-Assembled Monolayers"
    Scientific Reports 5, 12570 (2015).
  4. Amemiya, T., Ishikawa, A., Kanazawa, T., Kang, J., Nishiyama, N., Miyamoto, Y., Tanaka, T., and Arai, S.:
    "Permeability-controlled optical modulator with Tri-gate metamaterial: control of permeability on InP-based photonic integration platform"
    Scientific Reports 5, 8985 (2015).
  5. Tomioka, T., Kubo, S., Nakagawa, M., Hoga, M., and Tanaka, T.:
    "Split-Ring Resonators Interacting with a Magnetic Field at Visible Frequencies"
    Appl. Phys. Lett. 103, 71104 (2013)
  6. W-Tamaki, R., Ishikawa, A., Tanaka, T., Zako, T., and Maeda, M.:
    "DNA-Templating Mass Production of Gold Trimer Rings for Optical Metamaterials"
    The Journal of Physical Chemistry C 116, pp. 15028-15033 (2012)
  7. Cao, Y., Takeyasu, N., Tanaka, T., Duan, X-M., and Kawata, S.:
    "3D Metallic Nano-Structure Fabrication By Surfactant-Assisted Multi-Photon-Induced Reduction"
    Small 5, pp. 1144-1148 (2009)
  8. Tanaka, T., Ishikawa, A., and Kawata, S.:
    "Unattenuated light transmission through the interface between two materials with different indices of refraction using magnetic metamaterials"
    Phys. Rev. B 73, 125423 (2006)
  9. Tanaka, T., Ishikawa, A., and Kawata, S.:
    "Two-photon-induced reduction of metal ions for fabricating three-dimensional electrically conductive metallic microstructure"
    Appl. Phys. Lett. 88, 81107 (2006)
  10. Ishikawa, A., Tanaka, T., and Kawata, S.:
    "Negative Magnetic Permeability in the Visible Light Region"
    Phys. Rev. Lett. 95, 237401 (2005)

Lab Members

Principal Investigator

Takuo Tanaka
Chief Scientist

Core Members

Renilkumar Mudachathi
Postdoctoral Researcher
Yusuke Kikuchi
Junior Research Associate
Taeko Matsukata
Student Trainee
Yuki Nakamura
Student Trainee
Ryutaro Ikeda
Student Trainee
Yuki Sakamoto
Student Trainee
Nobuyuki Takeyasu
Visiting Scientist
Akihiro Takezawa
Visiting Scientist
Atsushi Ishikawa
Visiting Scientist
Tomohiro Amemiya
Visiting Scientist
Yukie Mino-Yokota
Visiting Scientist

Contact information

2-1 Hirosawa, Wako, Saitama 351-0198, Japan

Email: t-tanaka [at]

Related links

Annual research report