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Topological beaming of light: proof-of-concept experiment.

Yu Sung Choi1, Ki Young Lee1, Soo-Chan An1

  • 1Department of Physics, Hanyang University, Seoul, 133-791, South Korea.

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|March 13, 2025
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Summary

We demonstrate a new topological beam shaping method using Jackiw-Rebbi states in metasurfaces. This approach offers precise control over light beam profiles for advanced nanophotonic applications.

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Area of Science:

  • Nanophotonics
  • Topological Physics
  • Metamaterials

Background:

  • Beam shaping in nanophotonics often requires complex optimization.
  • Existing methods can be inefficient and difficult to control.

Purpose of the Study:

  • To experimentally demonstrate a novel topological beam shaping technique.
  • To utilize Jackiw-Rebbi states in metasurfaces for precise beam control.

Main Methods:

  • Fabrication of thin-film dielectric structures with engineered Dirac-mass distributions.
  • Creation of domain walls to control beam profiles.
  • Observation and confirmation of localized Jackiw-Rebbi states.

Main Results:

  • Successful experimental demonstration of topological beam shaping.
  • Observation of localized Jackiw-Rebbi states.
  • Achieved a flat-top beam profile by tailoring Dirac-mass distribution.

Conclusions:

  • This work presents a new, efficient mechanism for beam control in nanophotonics.
  • The method is rooted in topological physics and offers customized beam shaping.
  • The approach provides a viable strategy for nanophotonic design.