Institute for Materials Chemistry and Engineering, Kyushu University


LAST UPDATE 2020/06/09

  • 研究者氏名
    Researcher Name

    斉藤光 Hikaru SAITO
    准教授 Associate Professor
  • 所属
    Professional Affiliation

    Institute for Materials Chemistry and Engineering, Kyushu University

    Department of Integrated Materials
  • 研究キーワード
    Research Keywords

    Electron microscopy
    Electron beam spectroscopy
Research Subject
Study on nanophotonic phenomena excited by an electron beam and development of new nano-spectroscopy method

研究の背景 Background


Electron microscopes are known as the ultimate analytical tool for visualizing materials at an atomic resolution. Furthermore, the excited states can be spectroscopically analyzed by inelastic electron scattering resulting from interaction between the electron beam and samples or light emission from the samples. Recently variety phenomena unique to electron beam excitation have been discovered due to rapid advancement of electron microscopy and spectroscopy, which are expected to generate new microspectroscopies as well as ultrafast dynamic observation and damage-less observation.

研究の目標 Outcome


I am trying to enhance or manipulate light absorption and emission of materials using surface plasmons excited on the metal surface. It has become possible to visualize the details of light-matter interaction by electron beam spectroscopy at a nano scale. Furthermore, new electron beam-material interactions have been discovered. Through the development of electron microscope-related devices, I am aiming to establish new analysis method revealing dynamics of excitation and relaxation processes.

研究図Research Figure

Fig.1. Schematic drawing of momentum-resolved electron energy-loss spectroscopy.

Fig.2. Plasmonic waveguide mode visualized at a line defect introduced in a plasmonic crystal.

Fig.3. Nanoscopic and spectroscopic visualization of luminescence enhancement due to plasmonic nanoresonators.

文献 / Publications

Microscopy 63, 85 (2014). Opt. Express 23, 2524 (2015). J. Appl. Phys. 117, 133107 (2015). Nano Lett. 15, 6789 (2015). Nano Lett. 15, 5764 (2015).

Light : Sci. Appl. 5, e16146 (2016). ACS Photon. 4, 1361 (2017). ACS Photon. 5, 4476 (2018). ACS Photon. 6, 2618 (2019). Phys. Rev. B 100, 242502 (2019).