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Topological Photonics on a Small Scale.

Dmitry V Zhirihin1, Yuri S Kivshar1,2

  • 1School of Physics and Engineering, Faculty of Physics ITMO University St. Petersburg 197101 Russia.

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|April 11, 2025
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Summary
This summary is machine-generated.

This study explores nanoscale topological photonics, focusing on creating robust optical devices immune to disorder. It highlights small-scale topological states and novel subwavelength cavities for advanced photonic applications.

Keywords:
Su–Schrieffer–Heeger modelhigher-order topological statesnonlinear nanophotonicspolaritonstopological photonicszigzag arrays

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Area of Science:

  • Photonics
  • Topological Physics
  • Nanotechnology

Background:

  • Topological phases of light offer robust optical structures and on-chip devices resistant to scattering and disorder.
  • Current demonstrations often utilize larger-scale structures, limiting miniaturization.

Purpose of the Study:

  • To discuss the physics and realization of topological photonics at small scales (wavelength-comparable dimensions).
  • To highlight experimental demonstrations of small-scale topological states.
  • To introduce a novel platform for subwavelength topological cavities using higher-order effects.

Main Methods:

  • Review of experimental demonstrations using resonant nanoparticle arrays.
  • Discussion of a novel photonic platform leveraging higher-order topological effects.
  • Focus on topological polaritonic structures.

Main Results:

  • Experimental realization of small-scale topological states.
  • Proposal of a new platform for highly efficient, subwavelength, topologically protected optical cavities.
  • Progress in topological polaritonic structures.

Conclusions:

  • Nanoscale topological photonics enables robust, miniaturized optical devices.
  • Higher-order topological effects are key for subwavelength cavity design.
  • Future directions point to significant impact across various scientific fields.