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Characterization of in-situ terahertz detection by optical interaction in a periodically poled stoichiometric lithium tantalate nonlinear crystal

  • Kyu-Sup Lee
  • Do-Kyeong Ko
  • Shunji Takekawa
  • Kenji Kitamura
  • Nan Ei Yu
Article

Abstract

Terahertz waves are generated using a femtosecond laser pulse in a periodically poled stoichiometric lithium tantalate crystal and simultaneously detected via a non-collinear optical parametric interaction inside the same crystal. Real time up-conversion signal between the generated THz and an optic probe pulses is measured depending on the beam overlapped conditions using a general silicon-photodiode for the THz detection. The non-collinear geometry is to facilitate manipulated property of the position-dependent bandwidth at narrow and broad bandwidths of 45 GHz and 3.3 THz, respectively at the one crystal. Furthermore, an aperture effect at the detection part is characterized as the function of size and position owing to the spatial distribution of the frequency conversion signal and it is applied in optimization of the in-situ detection scheme.

Keywords

Terahertz generation and detection Quasi-phase-matching Periodically Poled lithium tantalate crystal In-situ terahertz measurement 

Notes

Acknowledgements

This research was partially supported by the National Research Foundation (NRF) of Korea funded by the Ministry of Education, Science and Technology (R15-2008-006-02001-0), (No. 2010-0009146) and also by the Asian Laser Center Program provided by the GIST. Author (N. E. Yu) was also partially supported by the Happy tech. program through the NRF (No. 2011-0020956).

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Kyu-Sup Lee
    • 1
  • Do-Kyeong Ko
    • 1
    • 2
  • Shunji Takekawa
    • 3
  • Kenji Kitamura
    • 3
  • Nan Ei Yu
    • 2
  1. 1.Department of Photonics and Applied PhysicsGwangju Institute of Science and Technology (GIST)GwangjuRepublic of Korea
  2. 2.Advanced Photonics Research InstituteGISTGwangjuRepublic of Korea
  3. 3.National Institute for Materials ScienceTsukubaJapan

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