Albert S. Reyna

Nonlinearity management of photonic composites and observation of spatial-modulation instability due to quintic nonlinearity

We present a procedure for nonlinearity management of metal-dielectric composites. Varying the volume fraction occupied by silver nanoparticles suspended in acetone we could cancel the refractive index related to the third-order susceptibility,

Spatial phase modulation due to quintic and septic nonlinearities in metal colloids

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Stability conditions for one-dimensional optical solitons in cubic-quintic-septimal media

, and the nonlinear refraction behavior was due to the fifth-order susceptibility,

Guiding and confinement of light induced by optical vortex solitons in a cubic-quintic medium.

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An optimization procedure for the design of all-optical switches based on metal-dielectric nanocomposites.

. Hence, in a cross-phase modulation experiment, we demonstrated for the first time the effect of spatial-modulation- instability due to

High-order optical nonlinearities in plasmonic nanocomposites—a review

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Measurements of the nonlinear refractive index in scattering media using the Scattered Light Imaging Method - SLIM

. The results are corroborated with numerical calculations based on a generalized Maxwell-Garnet model.

Nonlinear polarization instability in cubic-quintic plasmonic nanocomposites

We report spatial self- and cross-phase modulation effects in metal-dielectric nanocomposites (MDNCs) whose nonlinear (NL) response is dominated by the quintic or septic refractive nonlinearity. The MDNCs consist of silver nanoparticles (NPs) suspended either in acetone or carbon disulfide and their effective NL susceptibilities are controlled by adjusting the volume fraction occupied by the NPs and the incident laser intensity. A theoretical treatment based on the Maxwell-Garnett model was developed to include contributions up to the seventh-order susceptibility showing a very good agreement with the experimental results.

Replica Symmetry Breaking in the Photonic Ferromagneticlike Spontaneous Mode-Locking Phase of a Multimode Nd:YAG Laser

(Received 8 June 2015; published 8 September 2015)Conditions for stable propagation of one-dimensional bright spatial solitons in media exhibiting opticalnonlinearities up to the seventh order are investigated. The results show well-defined stability regions even whenall the nonlinear terms are focusing. Conditions for onset of the supercritical collapse of the optical beam areidentifiedtoo.Avariationalapproximation(VA)isusedtopredictdependenceofthesoliton’spropagationconstanton the norm, and the respective stability regions are identified using the Vakhitov-Kolokolov criterion. Analyticalresults obtained by means of the VA are corroborated by numerical simulations of the cubic-quintic-septimalnonlinear Schrodinger equation.¨DOI: 10.1103/PhysRevA.92.033810 PACS number(s): 42

Two-dimensional solitons in a quintic-septimal medium

The observation of confinement and guiding of light induced by an optical vortex soliton (OVS) in a cubic-quintic (defocusing-focusing) medium is reported. The waveguide effect induced by the bright region of the vortex beam, is mainly due to the defocusing nonlinearity that allows the guiding of a probe beam propagating inside of the OVS dark region. The experimental results are corroborated by numerical simulations based on the cubic-quintic nonlinear Schrödinger equation, showing excellent agreement.