A5083924036- Quantum Dots Synthesis And Properties
- Glass properties and applications
- Solid State Laser Technologies
- Photonic Crystal and Fiber Optics
- Chalcogenide Semiconductor Thin Films
- Luminescence Properties of Advanced Materials
- Laser-induced spectroscopy and plasma
- Laser-Ablation Synthesis of Nanoparticles
- Phase-change materials and chalcogenides
- Semiconductor Lasers and Optical Devices
- Advanced Thermoelectric Materials and Devices
- Optical Network Technologies
- Advanced Fiber Optic Sensors
- Nonlinear Optical Materials Studies
- Photonic and Optical Devices
- Photorefractive and Nonlinear Optics
- Plasma Diagnostics and Applications
- Laser Design and Applications
- Photonic Crystals and Applications
- Orbital Angular Momentum in Optics
- Gold and Silver Nanoparticles Synthesis and Applications
- Silicon Nanostructures and Photoluminescence
- Metal and Thin Film Mechanics
- nanoparticles nucleation surface interactions
- Cold Atom Physics and Bose-Einstein Condensates
Instituto Politécnico Nacional
2015-2025
Universidad de Sonora
2023
Eindhoven University of Technology
2022
Institut Català de Nanociència i Nanotecnologia
2020
Instituto de Cerámica y Vidrio
2020
Universidad de Sevilla
2017
Universidade Estadual de Campinas (UNICAMP)
2004-2012
Hospital de Clínicas da Unicamp
2010-2012
Pacific Northwest National Laboratory
2001
University of Havana
1999
Due to their biocompatibility and non-toxicity, biopolymer-based films hold significant importance in bioengineering. It is imperative comprehend the influence of chitosan molecular weight filler materials nature on crystalline structure subsequent effect film properties. The aim this research was determine how carbon nanotubes embedded within can significantly improve performance produced by solvent-casting technique. Four probe measurements demonstrated that medium-molecular-weight...
When treating problems of vector diffraction in electromagnetic theory, the evaluation integral involving Bessel and associated Legendre functions is necessary. Here we present analytical result for this that will make unnecessary numerical quadrature techniques or localized approximations. The solution presented using properties functions.
Using an analytical expression for integral involving Bessel and Legendre functions we succeeded to obtain the partial wave decomposition of a general optical beam at arbitrary location from origin. We also showed that solid angle integration will eliminate radial dependence expansion coefficients. The shape coefficients obtained are given by exact in terms single or double integrals. These integrals can be evaluated numerically short time scale. presented results case linear polarized Gaussian beam.
A double tweezers setup was employed to perform ultra sensitive force measurements and obtain the full optical curve as a function of radial position wavelength. The light polarization used select either transverse electric (TE), or magnetic (TM), both, modes excitation. Analytical solution for trapping on spherical dielectric particle an arbitrary positioned focused beam is presented in generalized Lorenz-Mie diffraction theory. theoretical prediction theory agrees well with experimental...
This paper reports the synthesis of silver nanoparticles coated with porous silica (Ag@Silica NPs) using an assisted laser ablation method. method is a chemical where one reagents (the reducer agent) introduced in nanometer form by solid target submerged aqueous solution. In first step, silicon wafer immersed water solution was ablated for several minutes. Subsequently, AgNO3 aliquot added to The redox reaction between ions and products leads colloidal suspension core-shell Ag@Silica NPs....
Chitosan is a biopolymer with unique properties that have attracted considerable attention in various scientific fields recent decades. Although chitosan known for its poor electrical and mechanical properties, there interest producing chitosan-based materials reinforced carbon-based to impart exceptional such as high conductivity Young’s modulus. This study describes the synergistic effect of materials, reduced graphene oxide carbon nanotubes, improving electrical, optical, films. Our...
Ge nanocrystallites (Ge-nc) embedded in a SiO2 matrix are investigated using Raman spectroscopy, photoluminescence and Fourier transform infrared spectroscopy. The samples were prepared by ion implantation with different doses (0.5, 0.8, 1, 2, 3 4) × 1016 cm−2 250 keV energy. After implantation, the annealed at 1000 °C forming gas atmosphere for 1 h. All show broad spectrum centred w≈304 cm−1 slight shift depending on doses. intensity also depends Ge74+ dose.
This letter describes a principle demonstration of an ultrafast optical switch operating at 1Tbit∕s using CdTe-quantum-dots-doped glasses. Using three-beam pump and probe experiment, we showed that thermal effects are responsible for baseline in the graphs nonexistence carrier accumulation effects. After eliminating effects, that, when two pulses delayed by 1 ps, each pulse modulates independently, making this material highly promising all switching.
The synthesis processes of metallic nanoparticles have seen a growing interest in recent years, mainly by the potential applications phenomenon localized surface plasmon resonance associated with nanoparticles. This paper shows fast method to synthesize silver, gold and silver/gold alloy coated porous silica shell assisted laser ablation three steps. involves redox chemical reaction where reducing agent is supplied nanometric form ablation. In first step, silicon target immersed water...
We report the fabrication of multilayer structures containing layers PbTe quantum dots (QDs) spaced by 15–20 nm thick SiO2 layers. The QDs were grown laser ablation a target using second harmonic Nd:YAG in an argon atmosphere. fabricated plasma chemical vapor deposition tetramethoxysilane as precursor. influence time on size and distribution is studied high-resolution transmission electron microscopy. Optical absorption measurements show clearly confinement effects.
Size-selected TiN nanoclusters in the range of 4 to 20 nm have been produced by an ionized cluster beam, which combines a glow-discharge sputtering with inert gas condensation technique. With this method, controlling experimental conditions, it was possible produce nanoparticles high control size. The size distribution determined before deposition mass spectroscopy and confirmed atomic force microscopy. also analyzed using high-resolution transmission electron micrograph. photoluminescence...