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Updated: Jul 17, 2026

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
07:28

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Published on: August 30, 2012

Terahertz achromatic quarter-wave plate.

Jean-Baptiste Masson1, Guilhem Gallot

  • 1Laboratoire d'Optique et Biosciences, CNRS UMR 7645, INSERM U696, Ecole Polytechnique, Palaiseau, France.

Optics Letters
|January 31, 2006
PubMed
Summary

We designed an achromatic quarter-wave plate for terahertz applications. This device exhibits a wide frequency bandwidth, making it suitable for terahertz spectroscopy and polarimetry.

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Area of Science:

  • Optics and Photonics
  • Terahertz Science and Technology

Background:

  • Phase retarders typically exhibit significant frequency dependence.
  • Achieving broadband performance in optical components is crucial for advanced spectroscopic techniques.

Purpose of the Study:

  • To design and characterize a terahertz achromatic quarter-wave plate.
  • To overcome the frequency limitations of conventional phase retarders in the terahertz spectrum.

Main Methods:

  • The quarter-wave plate was constructed using six precisely stacked birefringent quartz plates.
  • Terahertz polarimetry was employed to measure phase retardation across the entire terahertz frequency range.

Main Results:

  • The designed wave plate demonstrated achromatic behavior over a broad terahertz frequency range.
  • A significant frequency bandwidth, with a ratio (upsilonmax/upsilonmin) of approximately 7, was achieved.

Conclusions:

  • The developed terahertz achromatic quarter-wave plate offers a wide operational bandwidth.
  • This component is well-suited for applications in terahertz time-domain spectroscopy and polarimetry.

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