Angular surface solitons in sectorial hexagonal arrays

TL;DR

This paper experimentally demonstrates corner surface solitons in hexagonal waveguide arrays, showing how the face angle influences soliton formation, energy drift, and diffraction.

Contribution

It introduces the experimental observation of corner surface solitons in sectorial hexagonal arrays and analyzes the impact of face angle on their properties.

Findings

Corner surface solitons are observed at edges of hexagonal arrays.

The face angle significantly affects soliton excitation thresholds.

The face angle influences light energy drift and diffraction spreading.

Abstract

We report on the experimental observation of corner surface solitons localized at the edges joining planar interfaces of hexagonal waveguide array with uniform nonlinear medium. The face angle between these interfaces has a strong impact on the threshold of soliton excitation as well as on the light energy drift and diffraction spreading.