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Related Experiment Videos

Tunable Bragg filters based on polymer swelling.

Wolfgang Mönch1, Jan Dehnert, Oswald Prucker

  • 1Laboratory for Micro-optics, Deaprtment of Microsystems Engineering, University of Freiburg, Germany.

Applied Optics
|June 17, 2006
PubMed
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Researchers developed polymer Bragg filters with tunable optical properties. Adding organic solvents efficiently shifted the filter peak, offering a novel tuning method for optical devices.

Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Bragg mirrors and filters are crucial optical components.
  • Standard Bragg filters often lack tunability or rely on complex mechanisms.

Purpose of the Study:

  • To investigate the optical properties of Bragg filters made from photo-cross-linked polymers.
  • To demonstrate a novel tuning principle for polymer Bragg filters.

Main Methods:

  • Fabrication of Bragg mirrors and filters using standard optical polymers and photo-cross-linking.
  • Measurement of transmittance spectra in the visible to near-infrared range.
  • Exposure of polymer Bragg filters to organic solvents to observe spectral shifts.

Main Results:

  • Successfully fabricated polymer Bragg filters with measurable transmittance spectra.

Related Experiment Videos

  • Demonstrated efficient tuning of the filter peak over several hundred nanometers.
  • Identified organic solvent exposure as a key factor in spectral tuning.

    • Conclusions:

    • Photo-cross-linked polymers offer a viable material for Bragg filter fabrication.
    • A novel and efficient tuning mechanism for polymer Bragg filters using organic solvents was demonstrated.
    • This work introduces a new principle for tunable optical filters based on polymeric materials.