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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Dissipative Topological Dynamics in Optical Waveguides: Sensitivity versus Robustness.

Zhiyuan Lin¹, Jian Li¹, Wange Song¹

¹Nanjing University, National Laboratory of Solid State Microstructures, Key Laboratory of Intelligent Optical Sensing and Manipulations, Jiangsu Key Laboratory of Artificial Functional Materials, School of Physics, College of Engineering and Applied Sciences, Nanjing, 210093, China.

Physical Review Letters

|June 23, 2025

Summary

This summary is machine-generated.

Topological physics explores robust modes, but this study finds topological dissipative modes are sensitive to noise. Researchers developed a method to control robustness and stabilize these states in optical waveguide arrays.

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Area of Science:

Topological physics
Wave dynamics
Diffusion systems

Background:

Topological physics utilizes protected modes robust against disorder.
Recent work extends topological concepts to dissipative diffusion systems.
The transition between wave and diffusion dynamics is underexplored due to coupling complexities.

Purpose of the Study:

To develop a universal coupling control scheme for achieving diverse topological states.
To investigate the robustness of topological dissipative modes.
To propose methods for controlling topological robustness and stabilizing sensitive states.

Main Methods:

Reservoir engineering for universal coupling control.
Implementation in an optical waveguide array.
Analysis of topological dissipative modes within the complex band gap.

Main Results:

Achieved conservative, dissipative, and mixed topologies.
Demonstrated high sensitivity of topological dissipative modes to initial excitations and noise.
Identified the complex band gap as a key factor for mode excitation and preservation.
Proposed a method to manage dissipative potentials for controlling robustness.

Conclusions:

Topological dissipative modes exhibit unexpected sensitivity to noise.
The complex band gap influences the behavior of topological dissipative modes.
Dissipative potentials can be managed to control topological robustness.
New insights into dissipative topological dynamics for photonic chip applications.