Listar Grupo de Nanofotonica por título
Mostrando ítems 13-32 de 54
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Dual system increases the resolution of a low coherence interferometer system through a signal detector astigmatic focus
(2015-10-29)The low coherence interferometry in Fourier space (FD-OCT) is a technique to measure distance with typical values of dynamic range in the order of 3 mm and resolution below 10 microns. In this paper we propose to combine ... -
Dynamic Detection of Thicknesses in Polymer Deformation Based on the Optical Coherence Interferometry Technique
(2015-07-31)We describe the implementation of the optical coherence interferometry (OCT) technique in the dynamic measurement of the deformation of polymers. The experimental set-up of the interferometer system and the signal processing ... -
Efficient method of arsenic removal from water based on photocatalytic oxidation by a plasmonic–magnetic nanosystem
(2022-12-13)Arsenic is one of the most toxic elements in natural waters since prolonged exposure to this metalloid can cause chronic damage to health. Its removal from ground-water remains one of the greatest environmental challenges ... -
Estimación de frecuencias de señales interferométricas con redes neuronales
(2023-09)Una vez adquirida la señal óptica de la técnica de interferencia de baja coherencia mediante un espectrómetro es necesario realizar un post procesado para encontrar la frecuencia de oscilación característica de la señal. ... -
Extending low-coherence interferometry dynamic range using heterodyne detection
(2020-08)Low-coherence interferometry (LCI) technique is generating considerable interest in industrial applications where there is a need for larger measurements with high resolution. Conventional Fourier domain systems reach a ... -
Extensión del rango dinámico de la tomografía óptica coherente sensible a la fase
(RAFA - Santa Fé, 2019-10)La tomografía óptica coherente sensible a la fase (PhS-OCT), también conocida como microscopía de fase (SDPM), es una técnica que se basa en la medición de la fase en la señal de interferencia obtenida por tomografía óptica ... -
Fabricación y Caracterización de Sustratos Plasmónicos Basados en Nanobastones de Oro
(2015)Se fabricaron sustratos plasmónicos mediante el recubrimiento controlado de superficies de vidrio y películas delgadas de oro con nanobastones de oro. Estos sustratos nanoestructurados poseen resonancias ópticas en el ... -
Fabry Perot detector for low coherence interferometry
(2023-06)Se proponen dos diseños teóricos de detectores de intensidad para distintas longitudes de onda basados en cavidades Fabry Perot para ser aplicados en la técnica de interferometría de baja coherencia en el dominio de las ... -
Fast scanner with position monitor forlargeopticaldelays
(2001-11-01)Wepresent a new fastscansystemthatemploys a stepper motor used in a single steposcillatingmode and a position monitor devicebasedon a diode laser. Thesetupusedgeneratesdelays as large as 105 ps at 10 Hz, with 100% dutycycle. ... -
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 ...