Browsing by Author "Bornacelli, Jhovani"

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    A comprehensive study of the nonlinear optical response exhibited by ion-implanted silica plates with Au and Pt nanostructures
    (2021) Hernandez-Acosta, Marco Antonio; Torres-Torres, Carlos; Bornacelli, Jhovani; Garcia-Merino, Jose Antonio; Can-Uc, Bonifacio; Rangel-Rojo, Raul; Oliver, Alicia
    Third -order nonlinear optical properties exhibited by Platinum nanoclusters and Gold nanoparticles integrated in a two -stage configuration are reported. Comparative nanostructures were nucleated in a monolithic complex platform form based on a single matrix by a dual ion -implantation process and a reduction in the ablation threshold from 2.2 J/cm2 to 1.2 J/cm2 was obtained. This modification in the photothermal response exhibited by the nanoparticles seems to derive from a fractional transfer of energy. Femtosecond z -scan measurements at 800 nm revealed a strong two -photon absorption in the dual -implanted sample together to an ultrafast electronic nonlinearity responsible for a self -defocusing effect. These findings highlight the potential for tailoring quantum systems by integration of hybrid photonic circuits using multi -implantation processes.
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    Structured light using carbon nanostructures driven by Kerr nonlinearities and a magnetic field
    (2022) Abraham Hurtado-Aviles, Eric; Vila, Maria; Vilatela, Juan Jose; Martines-Arano, Hilario; Bornacelli, Jhovani; Antonio Garcia-Merino, Jose; Cervantes-Sodi, Felipe; Torres-Torres, Carlos
    A substantial influence of a magnetic field on the third-order nonlinear optical properties exhibited by aggregated networks of aligned carbon nanotubes (CNT) is reported by systematic measurements. A two-wave mixing was employed to explore and modulate the refractive index in the nanostructures in the nanosecond and picosecond regime. The presence of a magnetic field was able to modify the optical transmittance in the sample and the potentiality to generate structured light was proposed. Numerical simulations were conducted to analyze the magnetic field phenomena and the oscillations of the electric field in the studied sample. We discussed theoretical concepts, experimental methods, and computational tools employed to evaluate the third-order nonlinear optical properties of CNT in film form. Immediate applications of the system to modulate structured light can be contemplated.