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Related Experiment Video

Updated: Nov 20, 2025

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Liquid-crystal-based topological photonics.

Hamed Abbaszadeh1, Michel Fruchart2,3, Wim van Saarloos1

  • 1Instituut-Lorentz, Universiteit Leiden, Leiden 2300 RA, The Netherlands.

Proceedings of the National Academy of Sciences of the United States of America
|January 21, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a novel soft-matter platform using liquid crystals to create topological photonic materials. These materials offer potential for robust light manipulation in applications like waveguides and lasers.

Keywords:
liquid crystalsmetamaterialstopological mattertopological photonics

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Area of Science:

  • Soft matter physics
  • Photonics
  • Topological materials

Background:

  • Liquid crystals offer precise control over light propagation due to their ordered structure.
  • Topological insulators protect energy transport, inspiring new photonic designs.

Purpose of the Study:

  • To develop a soft-matter platform for assembling topological photonic materials.
  • To emulate time modulations using spatial variations in liquid crystal orientation for topological phenomena.

Main Methods:

  • Utilizing advances in liquid-crystal photo-patterning technology.
  • Employing spatial variations in nematic liquid-crystal director orientation to induce geometric phase.
  • Designing structural properties to create topologically protected states of light.

Main Results:

  • Demonstrated soft photonic realizations of Su-Schrieffer-Heeger and Chern insulator models.
  • Showcased how geometric phase from liquid crystal orientation creates topological states.
  • Proposed a platform for reconfigurable topological photonic systems.

Conclusions:

  • Soft-matter liquid crystal systems can be used to engineer topological photonics.
  • This approach enables the creation of protected unidirectional waveguides, sensors, and lasers.
  • The reconfigurable nature of soft building blocks allows for dynamic exploitation of topological light states.