Elastic-like Collision of Gap Solitons in Bragg Gap Regions within Nonlocal Nonlinear Photonic Crystals

TL;DR

This paper investigates the behavior of gap solitons in nonlocal nonlinear photonic crystals, revealing their enhanced stability, mobility, and elastic-like collision properties within Bragg gap regions, which could benefit optical switching technologies.

Contribution

It demonstrates that nonlocal nonlinearity improves the stability, mobility, and elastic collision behavior of gap solitons in photonic crystals, a novel insight for optical device applications.

Findings

Gap solitons exhibit improved stability in nonlocal nonlinear media.

Nonlocality enhances the mobility of gap solitons within Bragg gaps.

Elastic-like collisions of gap solitons are demonstrated in the studied system.

Abstract

We analyze the existence, stability, and mobility of gap solitons in a periodic photonic structure with nonlocal nonlinearity. Within the Bragg region of band gaps, gap solitons exhibit better stability and higher mobility due to the combinations of non-locality effect and the oscillation nature of Bloch waves. Using linear stability analysis and calculating the Peierls-Nabarro potentials, we demonstrate that gap solitons can revive a non-trivial elastic-like collision even in the periodic systems with the help of nonlocal nonlinearity. Such interesting behaviors of gap solitons in nonlocal nonlinear photonic crystals are believed to be useful in optical switching devices.