arXiv subjects

K. Z. Nóbrega

Publications and source records attributed to K. Z. Nóbrega.

3 recordsLinked to original sources

arXiv2023

Creating Light-Made Waveguides with Structured Optical Beams in Nonlinear Kerr Media

While in linear optics the subject of structured light has been a fruitful field of both theoretical and applied research, its development in the arena of nonlinear optics has been underexplored. In this paper, we construct Frozen-Wave-type structured optical beams in Kerr nonlinear media, emphasizing the self-defocusing case, and use them to guide and control Gaussian optical beams. The results presented in this study support the expectation that structured light in nonlinear media can open new venues of theoretical research and applications, particularly in the realms of light controlling light and for all-optical photonics.

physics.optics↗

arXiv2015

On the dynamics of Airy beams in nonlinear media with nonlinear losses

We investigate on the nonlinear dynamics of Airy beams in a regime where nonlinear losses due to multi-photon absorption are significant. We identify the nonlinear Airy beam (NAB) that preserves the amplitude of the inward Hänkel component as an attractor of the dynamics. This attractor governs also the dynamics of finite-power (apodized) Airy beams, irrespective of the location of the entrance plane in the medium with respect to the Airy waist plane. A soft (linear) input long before the waist, however, strongly speeds up NAB formation and its persistence as a quasi-stationary beam in comparison to an abrupt input at the Airy waist plane, and promotes the formation of a new type of highly dissipative, fully nonlinear Airy beam not described so far.

physics.optics↗

arXiv2013

Depth of Field of Finite Energy Airy Shaped Waves

In the present paper the analytical aspects related to the maximum invariance depth of propagation finite energy Airy-type beams are investigated, considering not only the usual exponentially dumped Airy beams but also the truncated ones. It is obtained an analytic expression which seems capable of finding accurately the maximum invariance distance of these waves. The results seem to be in line with those obtained from numerical simulations.

physics.optics↗