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Hyperbolic photonic topological insulators.

Lei Huang^1,2, Lu He^1,2, Weixuan Zhang^3,4

¹Key Laboratory of advanced optoelectronic quantum architecture and measurements of Ministry of Education, Beijing Institute of Technology, 100081, Beijing, China.

Nature Communications

|February 22, 2024

Summary

This summary is machine-generated.

Researchers have experimentally realized hyperbolic photonic topological insulators on silicon chips. These devices exhibit robust, one-way edge states, paving the way for novel topological photonic devices.

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Area of Science:

Photonics
Condensed Matter Physics
Materials Science

Background:

Topological photonics offers robust control of electromagnetic fields using topological states.
Existing topological states are primarily in Euclidean space, limiting device designs.
Hyperbolic lattices in non-Euclidean space offer unique properties for topological states, but experimental realization in photonics remains challenging.

Purpose of the Study:

To experimentally realize hyperbolic photonic topological insulators.
To demonstrate boundary-dominated one-way edge states in a hyperbolic photonic system.
To verify the robustness of these edge states for practical applications.

Main Methods:

Utilizing coupled ring resonators fabricated on silicon chips.
Engineering a hyperbolic lattice structure with specific resonator couplings.
Measuring and characterizing the propagation of light and edge states.

Main Results:

Successful experimental realization of hyperbolic photonic topological insulators.
Observation of boundary-dominated one-way edge states with pseudospin-dependent propagation.
Experimental verification of the robustness of the observed edge states.

Conclusions:

This work demonstrates a viable method for creating hyperbolic photonic topological insulators.
The observed one-way edge states offer potential for robust light manipulation.
Findings pave the way for advanced topological photonic devices with enhanced boundary responses.