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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.
Small Science
|April 11, 2025
Summary
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.
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.
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