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Polarization conversion by reflection in a thin-film grating.

S R Seshadri1

  • 1s.r.seshadri@worldnet.att.net

Journal of the Optical Society of America. A, Optics, Image Science, and Vision
|July 11, 2001
PubMed
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This study shows a dielectric-film waveguide with a grating can convert wave polarizations. Optimizing grating length and period enhances polarization conversion efficiency and selectivity for optical devices.

Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Dielectric-film waveguides are crucial for integrated optics.
  • Polarization control is essential for many photonic applications.

Purpose of the Study:

  • To analyze a dielectric-film waveguide with an etched grating as a polarization converter.
  • To investigate the influence of grating parameters on conversion efficiency and selectivity.

Main Methods:

  • Utilized a quasi-optic technique for analyzing the waveguide.
  • Investigated oblique incidence of guided waves onto the grating vector.

Main Results:

  • Demonstrated efficient conversion between e and h waves.
  • Showed that increasing grating length improves polarization-conversion efficiency.

Related Experiment Videos

  • Found that Bragg angles, maximum efficiency, and selectivity increase with grating period.

    • Conclusions:

    • A dielectric-film waveguide with a grating serves as an effective polarization converter.
    • Grating parameters significantly influence device performance, offering a pathway for optimization.