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Vortex ring beams in nonlinear P T-symmetric systems.

Cristian Mejía-Cortés, Jesús Muñoz-Muñoz, Mario I Molina

|April 15, 2024

Summary

This summary is machine-generated.

We studied optical ring modes in a 2D photonic array with gain and loss. Mode stability depends on array length and non-Hermitian strength, with higher vorticity enabling stability in smaller arrays.

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Area of Science:

Photonics
Non-Hermitian physics
Optical metamaterials

Background:

Photonic arrays are crucial for light manipulation.
Non-Hermitian systems offer unique optical properties.
Optical ring modes exhibit complex behaviors in structured media.

Purpose of the Study:

Investigate optical ring modes in a 2D circular photonic array.
Analyze the impact of alternating gain and loss patterns.
Determine the stability of these modes concerning array length and non-Hermitian parameter strength.

Main Methods:

Numerical simulations of a two-dimensional photonic array.
Analysis of optical ring modes with varying vorticity.
Systematic variation of array length and non-Hermitian parameter.

Main Results:

Stability domain of ring modes decreases with increasing array length and non-Hermitian parameter.
Higher vorticity modes exhibit enhanced stability.
Full stability windows appear in shorter lattices for higher vorticity modes.

Conclusions:

The interplay between array geometry, gain-loss, and mode vorticity dictates stability.
Vorticity is a key parameter for achieving stable optical modes in non-Hermitian photonic arrays.
Tailoring photonic array designs can control optical mode resilience.