Overview Research Talks Awards/Grants Experience

Research interest

X-ray physics, synchrotron radiation, ultra-precision engineering, molecular biology

My research question is: could we see through atoms with “chest X-rays”?

To unlock the potential of X-rays on an atomic scale, X-ray beams collected onto a small spot, called an X-ray nanoprobe, are crucial. Therefore, I dedicated my four years to designing and fabricating my novel X-ray focusing device, a combination of 2- and 8-mm-long ultrasmooth mirrors. I also verified the excellent focusing performance of this device by my simulation.

My design and fabrication process is patent-pending and their results are promising; they established the world’s sharpest and smallest X-ray nanoprobe that can utilize an entire range of less penetrative X-rays. Performing “chest X-rays” with this probe captured hundreds of atoms of interest inside animal cells. My research goal is to achieve an individual-atom resolution and I am upgrading my mirrors for more penetrative X-rays. I believe this atomic-scale observation technology will be able to create a metrological breakthrough in the fields of physics, biology, and medicines.

Publications

Journal articles

  1. Soft-X-ray nanobeams formed by aberration-reduced elliptical mirrors with large numerical aperture
    T. Shimamura, Y. Takeo, T. Kimura, Y. Senba, H. Kishimoto, H. Ohashi, and H. Mimura,  Opt. Express 31, 38132-38145 (2023).


  2. Fabrication of ultrashort sub-meter-radius x-ray mirrors using dynamic stencil deposition with figure correction
    T. Shimamura, Y. Takeo, T. Kimura, F. Perrin, A. Vivo, Y. Senba, H. Kishimoto, H. Ohashi, and H. Mimura,  Rev. Sci. Instrum. 94, 043102 (2023).


  3. Abrasive slurry jet machining system using polyurethane@silica core–shell particles for internal surfaces of axisymmetric x-ray mirrors
    S. Yokomae, Y. Takeo, T. Shimamura, Y. Senba, H. Kishimoto, H. Ohashi, and H. Mimura,  Rev. Sci. Instrum. 94, 015106 (2023).


  4. A highly efficient nanofocusing system for soft x rays
    Y. Takeo, H. Motoyama, T. Shimamura, T. Kimura, T. Kume, Y. Matsuzawa, T. Saito, Y. Imamura, H. Miyashita, K. Hiraguri, H. Hashizume, Y. Senba, H. Kishimoto, H. Ohashi, and H. Mimura,  Appl. Phys. Lett. 117, 151104 (2020).



Refereed conference proceedings

  1. Design of soft x-ray fluorescence microscopy beyond 100-nm spatial resolution with ultrashort Kirkpatrick-Baez mirror
    T. Shimamura, Y. Takeo, F. Moriya, T. Kimura, M. Shimura, Y. Senba, H. Kishimoto, H. Ohashi, K. Shimba, Y. Jimbo, H. Mimura,  Proc. SPIE 12240, 1224004 (2022).


  2. Development of figure correction system for axisymmetric x-ray mirrors
    S. Yokomae, Y. Takeo, T. Shimamura, Y. Matsuzawa, T. Kume, Y. Senba, H. Kishimoto, H. Ohashi, H. Mimura,  Proc. SPIE 11837, 1183709 (2021).


  3. Design of ultrashort Kirkpatrick-Baez mirror for soft x-ray nanofocusing
    T. Shimamura, Y. Takeo, T. Kimura, H. Hashizume, Y. Senba, H. Kishimoto, H. Ohashi, and H. Mimura,  Proc. SPIE 11492, 114920P (2020).


  4. Design of two-stage soft-X-ray nano-focusing system with a ring-focusing mirror and quasi-Wolter mirror
    Y. Takeo, H. Motoyama, T. Shimamura, T. Kimura, T. Kume, Y. Matsuzawa, T. Saito, Y. Imamura, H. Miyashita, K. Hiraguri, H. Hashizume, Y. Senba, H. Kishimoto, H. Ohashi, and H. Mimura,  Proc. SPIE 11492, 114920N (2020).


  5. Development of 120-mm-long ellipsoidal mirror for soft x-ray microscopy
    T. Kume, H. Hashizume, K. Hiraguri, Y. Imamura, H. Miyashita, T. Mukoda, Y. Matsuzawa, G. Yamaguchi, Y. Takeo, T. Shimamura, Y. Senba, H. Kishimoto, H. Ohashi, H. Mimura,  Proc. SPIE 11108, 1110806 (2019).



Patents

  1. Ultra-short X-ray focusing optics
    T. Shimamura, H. Hashizume, and H. Mimura,  JP Patent Pending , 2021-128004 (2021).


My website refers to that of UTokyo 10-minute lightning talks of research frontier, where I communicated the impact of X-ray optics to non-experts and administrated its website. My website is customized by myself.