Listar Grupo de Nanofotonica por fecha de publicación
Mostrando ítems 1-20 de 54
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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 ... -
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. ... -
Wide band interferometryforthicknessmeasurement
(2003)In thisworkwepresentthe concept of wide band interferometry as opposed to white-light interferometry to introduce a thickness measurementmethodthatgainsprecisionwhenthebandwidthisreduced to anadequatecompromise in order ... -
Simultaneous measurement of deformation and thickness change in polymer films
(2006-08-14)We present experimental results in deformation measurement and thickness change in polymer films employing Fourier domain interferometry. The set-up is a Michelson configuration in which interference signal betweeen light ... -
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 ... -
Simple method for thickness measurement in opaque samples with a Michelson-Sagnac interferometer
(2008-04-24)We present in this work a method to measure thicknesses of opaque samples. The technique combines the use of low coherence interferometry with a Michelson-Sagnac configuration. This ring set-up let us to measure both faces ... -
Characterization of reference standards for dirt by Laser Ablation Induced Photoacoustics (LAIP)
(2009-07-23)Measurements of surface cleanliness and dirt characterization are important problems in a wide range of processes in industry and production. Standard methods are in most cases cumber some laboratory procedures that must ... -
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 ... -
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 ... -
Cabezal óptico compacto aplicado a la medición de vibraciones sin contacto
(Cuarto Congreso Argentino de Ingeniería Mecánica – CAIM 2014, 2014)En este trabajo presentamos un cabezal óptico diseñado para medición de vibraciones basado en la señal de error de foco (SEF), la misma utilizada para leer datos en un cabezal láser de DVD o CD. El sistema fue diseñado ... -
Scanning optical coherence tomography applied to the characterization of surfaces and coatings
(El Sevier, 2014)This paper shows the technique of optical coherence tomography in the frequency domain (OCT-FD) to obtain surface topography and tomography of surface coatings. The setup is based on a superluminescent diode centered on ... -
Diseño y construcción de un módulo de microscopía de barrido por sondeo local y de un sistema de nanoposicionamiento de alta precisión para un microscopio multianálisis
(2014)Este trabajo presenta la técncia de interferometrá de baja coherencia orientada a la obtención de topografiá de superficies y tomografía de materiales. Se decribe la idea general, se presentan distintos esquemas experimentales ... -
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 ... -
Caracterización de recubrimientos obtenidos a partir de film líquidos por interferometría de baja coherencia.
(2015)En este trabajo se presenta la interferometría de baja coherencia como una técnica sin contacto para caracterizar recubrimientos obtenidos a partir de un film líquido depositado sobre distintos materiales. Nos referimos ... -
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 ... -
Recubrimiento controlado de sustratos de vidrio con nanobastones metálicos
(2015-03-12)Se realizó la síntesis de nanobastones de oro monodispersos con una eficiencia superior al 80% sobre el total de nanopartículas, caracterizado por una resonancia plasmónica longitudinal cercana a los 800 nm. Se modi- ficaron ... -
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 ... -
Dual system increases the resolution of a low coherence interferometer system through a signal detector astigmatic focus
(2015-10-29)La interferometría de baja coherencia en el espacio de Fourier (OCT-FD) es una técnica que permite medir distancia con valores típicos de rango dinámico en el orden de 3 mm y resolución por debajo de los 10 µm. En este ... -
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 ... -
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 ...