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Terahertz polarization real-time imaging based on balanced electro-optic detection.

Xinke Wang1, Ye Cui, Wenfeng Sun

  • 1Department of Physics, Harbin Institute of Technology, No. 92 XiDaZhiJie, Harbin 150001, China.

Journal of the Optical Society of America. A, Optics, Image Science, and Vision
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This study introduces a novel terahertz (THz) polarization real-time imaging system, significantly reducing experimental time. The new method precisely images sample polarization information, enhancing terahertz imaging capabilities.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Spectroscopy

Background:

  • Terahertz (THz) imaging is a powerful non-destructive technique.
  • Acquiring polarization information in THz imaging is time-consuming.
  • Existing methods lack efficiency in capturing polarization dynamics.

Purpose of the Study:

  • To develop a terahertz (THz) polarization real-time imaging system.
  • To reduce the experimental time for acquiring sample polarization data.
  • To enhance the information content of THz real-time imaging.

Main Methods:

  • A novel THz polarization measurement method using a <110> zinc-blende crystal as a sensor.
  • Adjusting probe polarization to detect orthogonal THz electric field components.
  • Achieving a relative sensitivity of less than 0.5° to the THz polarization angle.

Main Results:

  • The system successfully acquired real-time THz polarization images of two designed samples.
  • Precise presentation of each region within the samples was achieved.
  • Demonstrated the distinct influences of different materials on THz polarization.

Conclusions:

  • The developed system significantly reduces experimental time for THz polarization measurements.
  • The method enhances the information content obtainable through THz real-time imaging.
  • This advancement improves the feasibility and applicability of THz imaging techniques.