06 Photoelectron Holography

Time-Resolved Atomic Imaging of 3D Active-Site by Micro-Photoelectron Holography

The purpose on this research is to perform photoelectron holography measurements for a variety of materials, in which impurity sites of dopants, active-sites of catalysis, and local structures of interfaces fulfil their important functions. Usually, such active-site does not exist on periodic sites, therefore, conventional diffraction methods do not work for determining their local atomic structures. The photoelectron holography technique is one of the best experimental technique to realize for imaging their three dimensional structures.

In this project, we will realize the followings.

[TARGET 1]  Distinguished imaging of active-sites depending on chemical bonding conditions by using high-energy resolution apparatus.

  We realize site-specific imaging of dopants or catalysts using sub-eV scale binding energy difference in photoelectron spectra. Both structural and electronic states information for “3D active-site” will be obtained.

[TARGET 2]   Pinpoint analysis by using micron-size beam.

  We design micron-size synchrotron radiation beam at the soft X-ray beamline at SPring-8. Combination of the micro-beam with the photoelectron holography method enable us to image “3D-active-site” in sub-10 mm region for a variety of samples.

[TARGET 3]   Time-resolved dynamical analysis under applying outer field.

  We realize pump & probe photoelectron holography methods in sub-ns region. The investigation for realistic device materials in operand with magnetic, electric pulses is performed.




Members

Principal Investigator
 
  Toyohiko KINOSHITA

Chief Scientist, Research & Utilization Division, Japan Synchrotron Radiation Research Institute

Research Field : Synchrotron Radiation Spectroscopy, Microscopy
Comment : I expect to contribute the 3D-active site investigations using synchrotron radiation  methods.

URL:http://www.spring8.or.jp/en/
     
Co-Investigator
 
Hiroshi DAIMON

Professor, Graduate School of Materials Science, Nara Institute of Science and Technology

Research Field : Surface Science, Synchrotron Radiation Photoelectron Spectroscopy
 

Fumihiko MATSUI

Associate Professor, Graduate School of Materials Science, Nara Institute of Science and Technology
     

 
Takayuki MURO

Senior Scientist, Japan Synchrotron Radiation Research Institute (JASRI)

Research Field : Photoemission spectroscopy using synchrotron radiation
Comment :I am a staff of SPring-8 working at a photoemission spectroscopy station for public use. If you are interested in photoemission spectroscopy at SPring-8, please feel free to contact me..

URL:
     

 

Masaru SHIMOMURA

Professor, Graduate School of Integrated Science and Technology, Shizuoka University
     
Collaborator

 

Masanari KOUGUCHI

Principal Researcher, Center for Exploratory Research, Hitachi Ltd.
 

Munetaka TAGUCHI

Research Assistant Professor, Graduate School of Materials Science, Nara Institute of Science and Technolog
 

Takayoshi YOKOYA

Professor, Graduate School of Natural Science and Technology, Okayama University
 

Takanori WAKITA

Research Assistant Professor, Graduate School of Natural Science and Technology, Okayama University
 

Kensei TERASHIMA

Research Assistant Professor, Graduate School of Natural Science and Technology, Okayama University
 

Hiroyuki MATSUDA

Research Assistant Professor, Graduate School of Materials Science, Nara Institute of Science and Technology
 

Iwao MATSUDA

Associate Professor, Institute for Solid State Physics, University of Tokyo
 

Susumu YAMAMOTO

Research Associate, Institute for Solid State Physics, University of Tokyo


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