Listar Grupo de Nanofotonica por título
Mostrando ítems 22-41 de 54
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Harmonic demodulation and minimum enhancement factors in field-enhanced near-field optical microscopy
(2015-01)Field enhanced scanning optical microscopy (FESOM) relies on the design and fabrication of plasmonic probes which had to provide optical and chemical contrast at the nanoscale. In order to do so, the scattering containing ... -
High resolution imaging using nanoparticle based probes
(2018)New plasmonic probes, based on silica microspheres decorated with metal nanoparticles (Figure 1), are built and used to confine and enhance the electric field in their interaction with the sample, giving ultra-high optical ... -
Improved spectral resolution in time-varying interferometry
(2018-11)In this work, we present a procedure that allows increasing the resolution of dynamic length measurements made by spectral interferometry. The proposed scheme leads to obtaining a compact photonic instrument with the ability ... -
Inclination shift signal: thickness or index measurement in transparent media by transmission of generally astigmatic Gaussian beams
(2021-04)The focus error signal is a widespread optical technique that harnesses the shape of a simply astigmatic Gaussian beam to produce an output signal with a well-defined linear range used for many different applications. ... -
Interferometric system based on swept source-optical coherence tomography scheme applied to the measurement of distances of industrial interest
(2015-12-11)We used an interferometric technique based on typical optical coherence tomography (OCT) schemes for measuring distances of industrial interest. The system employed as a light source a tunable erbium-doped fiber laser of ... -
Interferometría óptica de baja coherencia para caracterización dimensional de microestructuras
(2016)En este trabajo se presenta un sistema de laboratorio basado en la técnica de interferometría óptica de baja coherencia en el dominio de las frecuencias (FD-OCT) para la caracterización dimensional de microestructuras. El ... -
Kinetic and plasmonic properties of gold nanorods adsorbed on glass substrates
(2019-09-19)Monodisperse gold nanorods with different sizes were synthesized and adsorbed on chemically modified glass substrates. Influence of surfactant molar concentration on nanorod adsorption was studied and the optimum range was ... -
Kinetic and plasmonic properties of gold nanorods adsorbed on glass substrates
(2019-10-24)Monodisperse gold nanorods with different sizes were synthesized and adsorbed on chemically modified glass substrates. Influence of surfactant molar concentration on nanorod adsorption was studied and the optimum range ... -
Limitations due to the detector in the low coherence interferometry
(2008-02-15)Se describirá como se generan las señales de interferometria de baja coherencia en el espacio de Fourier, se determinara las características que determinan el rango dinámico del sistema y las señales asociadas al sistema ... -
Long-range frequency domain low-coherence interferometry detector for industrial applications
(2023-01)A low-cost long-range frequency domain low-coherence interferometry (LCI) detector is presented: time Fourier domain LCI (TFD-LCI). Combining ideas of time domain and frequency domain techniques, the TFD-LCI detects the ... -
Low-coherence interferometry measurement of filling in porous silicon
(2018)The determination of capillary filling dynamics in nanoporous structures and, in particular, the analysis of the filling fraction profile in the advancing wet front have been proposed as possible methods for characterizing ... -
Microscopía óptica coherente por interferometría de baja coherencia de una sola rama aplicada a la caracterización de topografía de superficies
(2016)En este trabajo se presenta la técnica de microscopia óptica coherente basada en la interferometría de baja coherencia en el dominio de las frecuencias (FD-OCM por sus siglas en ingles) en un esquema experimental que propone ... -
Molecular rotational diusion detected by dierential fluorescence energy
(2000-03-01)In this paper, we present a complete study of the influence of the molecular rotational diffusion movement in the fluorescence signal when a sample is excited by two short pulses. The study includes the calculations of ... -
Monitoring the Photothermal Reshaping of Individual Plasmonic Nanorods with Coherent Mechanical Oscillations
(2018-12-03)Light absorption in gold nanoparticles leads to metal heating that induces photothermal reshaping because of atomic surface diffusion at temperatures well below the gold melting point. In this work, we perform time-resolved ... -
Nanoestructuras esféricas núcleo-cáscara con resonancias plasmónicas sintonizables
(Asociación Argentina de Investigación en Fisicoquímica, 2019-04)Las nanopartículas constituidas por un núcleo dieléctrico rodeado por una capa metálica forman una clase de nanoestructuras con notables propiedades ópticas. Sus resonancias de plasmones superficiales derivan del acoplamiento ... -
Nanoestructuras plasmónicas y magnéticas como fotocatalizadores en la oxidación de arsénico y su remoción del agua
(2022-10-03)Desarrollamos un protocolo de síntesis de nanoestructuras catalíticas bifuncionales, con propiedades plasmónicas y magnéticas, conformadas por nanoesferas de oro adsorbidas sobre un núcleo magnético de Fe3O4, para ser ... -
Nanopartículas metálicas para remediación de aguas con arsénico
(2023-05-03)La exposición prolongada al arsénico presente en aguas naturales provoca enfermedades crónicas en la población. La remoción de este metaloide de forma rápida y eficiente es uno de los mayores desafíos de hoy. En este trabajo ... -
Nanorod-based plasmonic substrates with predefined optical resonances
(2018)To design and fabricate plasmonic substrates to be used in ultrasensitive chemical sensing or surfaceenhanced spectroscopies, it is important to achieve control on the morphology, dimensions and surface density of metallic ... -
Optical coherence tomography-based scanning system for shape determination, wall thickness mapping, and inner inspection of glass containers
(2013-02)In this work we present a method that enables simultaneous measurement of shape and wall parameters of glass containers. The system is based on the optical coherence tomography technique, employing the spectral domain ... -
Plasmon-induced photochemical synthesis of silver triangular prisms and pentagonal bipyramids by illumination with light emitting diodes
(2013)We have grown silver prisms and pentagonal bipyramids, induced by plasmon excitation on a colloidal solution under the irradiation of light emitting diodes of different colors. Two methods of synthesis of the seeds were ...