Beam Splitters for High-Order Harmonics Using Transparent Materials to Visible Light

  • Yosuke Kojima
  • Yuske Furukawa
  • Yasuo Nabekawa
  • Eiji J. Takahashi
  • Fumihiko Kannari
  • Katsumi Midorikawa
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 125)

Abstract

High-order harmonic (HOH) beam generated from the intense femtosecond laser pulse always propagates coaxially with the fundamental laser field. Thus, we need to separate the fundamental laser field from the HOH beam whenever we apply the HOH to spectroscopies. Conventional thin foil metal filters can completely eliminate visible or infrared fundamental laser light, while the thin foils are very fragile and easily damaged with the intense fundamental laser pulse. We have already demonstrated that a silicon or silicon carbide plate is useful for splitting the fundamental and HOH beams thanks to the Brewster incident angle to the fundamental laser beam. Nevertheless, the silicon or silicon carbide (amorphous) beam splitter (BS) is not fully satisfactory for the application because the BS is opaque for visible light. Hence, we cannot reuse the transmitted light. Thermally induced effects such as deformation of the surface may not be negligible under the high-power irradiation of the laser field. Thus, we have searched for transparent materials for visible light which should be suitable for the BS of the HOH beam.

Keywords

Silicon Carbide Visible Light Beam Splitter Fundamental Laser Large Incident Angle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    E.J. Takahashi, H. Hasegawa, Y. Nabekawa, K. Midorikawa, Opt. Lett. 29, 507 (2004)Google Scholar
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    E.J. Takahashi, Y. Nabekawa, H. Mashiko, H. Hasegawa, A. Suda, K. Midorikawa, IEEE Selct. Top. Quant. Electron. 10, 1315 (2004)Google Scholar
  3. 3.
    Y. Nabekawa, A. Amani-Eilanlou, Y. Furukawa, K. Ishikawa, H. Takahashi, K. Midorikawa, Appl. Phys. B 101, 523 (2010)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Yosuke Kojima
    • 1
    • 2
  • Yuske Furukawa
    • 1
  • Yasuo Nabekawa
    • 1
  • Eiji J. Takahashi
    • 1
  • Fumihiko Kannari
    • 2
  • Katsumi Midorikawa
    • 1
  1. 1.Yasuo Nabekawa, Advanced Science InstituteRIKENWako-shiJapan
  2. 2.Yosuke Kojima, Faculty of Science and TechnologyKeio UniversityYokohamaJapan

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