Light bullets in Bessel optical lattices with spatially modulated nonlinearity

TL;DR

This paper investigates how spatially modulated nonlinearity in Bessel optical lattices affects the stability, shape, and energy of light bullets, revealing controllable stability domains and maximum energy thresholds.

Contribution

It introduces the impact of out-of-phase linear and nonlinear refractive index modulation on light bullets, highlighting new stability control mechanisms.

Findings

Spatial modulation alters light bullet shapes and stability.

Stable light bullets exist below a critical peak intensity.

Maximum energy of stable bullets increases with modulation depth.

Abstract

We address the stability of light bullets supported by Bessel optical lattices with out-of-phase modulation of the linear and nonlinear refractive indices. We show that spatial modulation of the nonlinearity significantly modifies the shapes and stability domains of the light bullets. The addressed bullets can be stable, provided that the peak intensity does not exceed a critical value. We show that the width of the stability domain in terms of the propagation constant may be controlled by varying the nonlinearity modulation depth. In particular, we show that the maximum energy of the stable bullets grows with increasing nonlinearity modulation depth.