Prof. Francisco González Profile

Prof. Francisco González

at Univ of Cantabria

SPIE Involvement:

Author

Publications (26)

Proceedings Article | 12 September 2021 Presentation

Optical characterization of phase-change materials for reconfigurable devices: GaS, Ga2S3 and MoOx: their plasmonics and beyond

Fernando Moreno, Yael Gutierrez Vela, Gonzalo Santos, Pablo García-Fernández, Javier Junquera, Mircea Modreanu, José Saiz, Dolores Ortiz, Francisco González, Maria Losurdo

Proceedings Volume 11872, 118720B (2021) https://doi.org/10.1117/12.2596836

KEYWORDS: Plasmonics, Metals, Plasmons, Electromagnetism, Chalcogenides, Ultraviolet radiation, Transition metals, Tellurium, Switching, Selenium

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Proceedings Article | 1 April 2020 Presentation + Paper

Metals and dielectrics for UV plasmonics

Y. Gutiérrez, F. González, J. Saiz, R. Alcaraz de la Osa, P. Albella, D. Ortiz, H. Everitt, F. Moreno

Proceedings Volume 11345, 113450O (2020) https://doi.org/10.1117/12.2555740

KEYWORDS: Ultraviolet radiation, Dielectrics, Plasmonics, Metals, Gallium, Rhodium, Near field, Neptunium, Aluminum nitride, Nanostructures

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Proceedings Article | 26 March 2020 Presentation

Enhancing light-matter interaction with dielectric nanoantennas for sensing, spectroscopy, and light guiding (Conference Presentation)

Angela Barreda, Francisco González, Fernando Moreno, Pablo Albella

Proceedings Volume 11289, 112891H (2020) https://doi.org/10.1117/12.2543993

KEYWORDS: Dielectrics, Nanoantennas, Magnetism, Spectroscopy, Light scattering, Particles, Scattering, Nanostructures, Plasmonics, Geometrical optics

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Proceedings Article | 16 February 2018 Presentation + Paper

Scattering directionality of high refractive index dielectric particles: a note for solar energy harvesting

Angela Barreda , Hassan Saleh, Amélie Litman, Francisco González, Jean-Michel Geffrin, Fernando Moreno

Proceedings Volume 10527, 105270K (2018) https://doi.org/10.1117/12.2290514

KEYWORDS: Particles, Dielectrics, Scattering, Dielectric polarization, Magnetism, Refractive index, Near field, Nanoparticles, Electromagnetic scattering

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Proceedings Article | 29 August 2017 Paper

Recent advances in metals for plasmonics applications in the UV range

Y. Gutiérrez, F. González, J. Saiz, R. Alcaraz de la Osa, J. Sanz, D. Ortiz, H. Everitt, F. Moreno

Proceedings Volume 10351, 103510B (2017) https://doi.org/10.1117/12.2273073

KEYWORDS: Plasmonics, Ultraviolet radiation, Metals, Rhodium, Photocatalysis, Spectroscopy, Magnesium, Aluminum, Gallium

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Proceedings Article | 22 August 2017 Paper

Modelling metal-dielectric core-shell nanoparticles with effective medium theories

Y. Gutiérrez, D. Ortiz, R. Alcaraz de la Osa, J. Sanz, J. Saiz, F. González, F. Moreno

Proceedings Volume 10453, 104531G (2017) https://doi.org/10.1117/12.2272116

KEYWORDS: Nanoparticles, Aluminum, Neptunium, Magnesium, Dielectrics, Plasmonics, Composites, Photocatalysis, Nanoplasmonics, Electromagnetism

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Proceedings Article | 22 August 2017 Paper

The extended Kubelka-Munk theory and its application to colloidal systems

R. Alcaraz de la Osa, A. Fernández, Y. Gutiérrez, D. Ortiz, F. González, F. Moreno, J. Saiz

Proceedings Volume 10453, 104531F (2017) https://doi.org/10.1117/12.2272115

KEYWORDS: Absorption, Mie scattering, Scattering, Light scattering, Particles, Colorimetry, Optical properties, Monte Carlo methods

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Proceedings Article | 29 April 2016 Paper

Using linear polarization for sensing and monitoring nanoparticle purity

Ángela Barreda Gomez, Juan Sanz, Rodrigo Alcaraz de la Osa, José Saiz, Fernando Moreno, Francisco González, Gorden Videen

Proceedings Volume 9899, 98991O (2016) https://doi.org/10.1117/12.2227774

KEYWORDS: Magnetism, Dielectric polarization, Spherical lenses, Analytical research, Particles, Nanoparticles, Scattering, Polarization

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Proceedings Article | 18 April 2016 Presentation + Paper

Plasmonics in the UV range with Rhodium nanocubes

X. Zhang, Y. Gutiérrez, P. Li, Á. Barreda, A. Watson, R. Alcaraz de la Osa, G. Finkelstein, F. González, D. Ortiz, J. Saiz, J. Sanz, H. Everitt, J. Liu, F. Moreno

Proceedings Volume 9884, 98841E (2016) https://doi.org/10.1117/12.2227674

KEYWORDS: Plasmonics, Ultraviolet radiation, Silver, Surface enhanced Raman spectroscopy, Electromagnetism, Oxidation, Polarization, Aluminum, Scattering

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Proceedings Article | 14 March 2016 Paper

Polarimetric techniques for determining morphology and optical features of high refractive index dielectric nanoparticle size

Ángela Barreda , Juan Sanz, Rodrigo Alcaraz de la Osa, José Saiz, Fernando Moreno, Francisco González

Proceedings Volume 9756, 975627 (2016) https://doi.org/10.1117/12.2229488

KEYWORDS: Dielectrics, Refractive index, Nanoparticles, Magnetism, Polarimetry, Dielectric polarization, Electromagnetic radiation, Electromagnetic scattering, Scattering, Nanotechnology, Neptunium, Silicon, Light scattering, Particles, Spherical lenses

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Proceedings Article | 14 March 2016 Paper

Spectral response of dielectric nano-antennas in the far- and near-field regimes

Y. Gutiérrez, Á. Barreda, F. González, F. Moreno

Proceedings Volume 9756, 975628 (2016) https://doi.org/10.1117/12.2229490

KEYWORDS: Dielectrics, Near field, Plasmons, Surface enhanced Raman spectroscopy, Spectroscopy, Raman scattering, Scattering, Electromagnetism, Nanoparticles, Solids, Particles, Radio propagation, Wave propagation, Spherical lenses

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SPIE Journal Paper | 5 December 2012

Optical design and development of a fiber coupled high-power diode laser system for laser transmission welding of plastics

Eva Rodríguez Vidal, Iban Quintana, Jon Etxarri, Urko Azkorbebeitia, Deitze Otaduy, Francisco González, Fernando Moreno

OE, Vol. 51, Issue 12, 124301, (December 2012) https://doi.org/10.1117/12.10.1117/1.OE.51.12.124301

KEYWORDS: Semiconductor lasers, Laser systems engineering, Fiber coupled lasers, Laser welding, Polarization, Fiber couplers, Laser development, Optical design, Optical fibers, Zemax

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Proceedings Article | 9 May 2012 Paper

Laser transmission welding of Acrylonitrile-Butadiene-Styrene (ABS) using a tailored high power diode-laser optical fiber coupled system

E. Rodríguez-Vidal, I. Quintana, J. Etxarri, D. Otaduy, F. González, F. Moreno

Proceedings Volume 8433, 84330U (2012) https://doi.org/10.1117/12.922570

KEYWORDS: Semiconductor lasers, Laser welding, Polarization, Optical fibers, Polymers, Laser systems engineering, Fiber coupled lasers, Mirrors, Fiber couplers, Carbon nanotubes

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Laser transmission welding (LTW) of polymers is a direct bonding technique which is already used in different industrial applications sectors such as automobile, microfluidic, electronic and biomedicine. This technique offers several advantages over conventional methods, especially when a local deposition of energy and minimum thermal distortions are required. In LTW one of the polymeric materials needs to be transparent to the laser wavelength and the second part needs to be designed to be absorbed in IR spectrum. This report presents a study of laser weldability of ABS (acrylonitrile/butadiene/styrene) filled with two different concentrations of carbon nanotubes (0.01% and 0.05% CNTs). These additives are used as infrared absorbing components in the laser welding process, affecting the thermal and optical properties of the material and, hence, the final quality of the weld seam. A tailored laser system has been designed to obtain high quality weld seams with widths between 0.4 and 1.0mm. It consists of two diode laser bars (50W per bar) coupled into an optical fiber using a non-imaging solution: equalization of the beam quality factor (M²) in the slow and fast axes by a pair of micro step-mirrors. The beam quality factor has been analyzed at different laser powers with the aim to guarantee a coupling efficiency to the multimode optical fiber. The power scaling is carried out by means of multiplexing polarization technique. The analysis of energy balance and beam quality is performed in two linked steps: first by means ray tracing simulations (ZEMAX^®) and second, by validation. Quality of the weld seams is analyzed in terms of the process parameters (welding speed, laser power and clamping pressure) by visual and optical microscope inspections. The optimum laser power range for three different welding speeds is determinate meanwhile the clamping pressure is held constant. Additionally, the corresponding mechanical shear tests were carried out to analyze the mechanical properties of the weld seams. This work provides a detailed study concerning the effect of the material microstructure and laser beam quality on the final weld formation and surface integrity.

SPIE Journal Paper | 1 January 2011 Open Access

Electric and magnetic dipolar response of germanium nanospheres: interference effects, scattering anisotropy, and optical forces

Raquel Gomez-Medina, Braulio Garcia-Camara, Irene Suarez-Lacalle, Francisco González, Fernando Moreno, Manuel Nieto-Vesperinas, Juan Jose Saenz

JNP, Vol. 5, Issue 01, 053512, (January 2011) https://doi.org/10.1117/12.10.1117/1.3603941

KEYWORDS: Particles, Magnetism, Scattering, Germanium, Optical spheres, Mie scattering, Refractive index, Dielectrics, Anisotropy, Absorption

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Proceedings Article | 20 August 2010 Paper

Polar decomposition applied to light scattering by structured 2D surfaces

J. M. Sanz, J. Saiz, F. Moreno, F. González

Proceedings Volume 7792, 779203 (2010) https://doi.org/10.1117/12.862257

KEYWORDS: Scattering, Light scattering, Laser scattering, Polarimetry, Transmittance, Matrices, Silicon, Diffraction, Mueller matrices, Polysomnography

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Proceedings Article | 24 August 2009 Paper

Design and optimization of a collimating optical system for high divergence LED light sources

E. Vidal, D. Otaduy, F. González, J. Saiz, F. Moreno

Proceedings Volume 7428, 74280C (2009) https://doi.org/10.1117/12.825287

KEYWORDS: Mirrors, Light emitting diodes, Collimation, Light sources, Aspheric lenses, Polymethylmethacrylate, Optical design, Silicon, Optimization (mathematics), Sensors

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Proceedings Article | 19 July 1999 Paper

Application of a double interaction model to the backscattering peak observed for polydisperse particulate samples

J. de la Pena, Jose Saiz, Francisco Gonzalez, Pedro Valle, Fernando Moreno

Proceedings Volume 3749, (1999) https://doi.org/10.1117/12.354939

KEYWORDS: Light scattering, Backscatter, Scattering, Particles, Atmospheric modeling, Statistical modeling, Mie scattering, Spherical lenses, Optical spheres, Gold

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Proceedings Article | 19 July 1999 Paper

Visibility factor for low-particle-size polydispersity

Jose Saiz, J. de la Pena, Pedro Valle, Francisco Gonzalez, Fernando Moreno, Gorden Videen

Proceedings Volume 3749, (1999) https://doi.org/10.1117/12.354832

KEYWORDS: Visibility, Particles, Light scattering, Scattering, System on a chip, Americium, Analytical research, Statistical analysis, Spherical lenses, Optical spheres

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SPIE Journal Paper | 1 June 1999

Application of a double interaction model to the backscattering from particulate surfaces

J. de la Pena, Francisco Gonzalez, Jose Saiz, Fernando Moreno, Pedro Valle

OE, Vol. 38, Issue 06, (June 1999) https://doi.org/10.1117/12.10.1117/1.602144

KEYWORDS: Particles, Backscatter, Scattering, Optical spheres, Polarization, Dielectric polarization, Dielectrics, Gold, Atmospheric modeling, Light scattering

Proceedings Article | 1 September 1996 Paper

Determination of the metallic particle size on flat substrates by means of light scattering experiments

F. González

Proceedings Volume 2778, 27783A (1996) https://doi.org/10.1117/12.2299000

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SPIE Journal Paper | 1 April 1995

Scattering from particulate metallic surfaces: effect of surface particle density

Francisco Gonzalez, Jose Saiz, Pedro Valle, Fernando Moreno

OE, Vol. 34, Issue 04, (April 1995) https://doi.org/10.1117/12.10.1117/12.197091

KEYWORDS: Particles, Light scattering, Scattering, Optical spheres, Backscatter, Spherical lenses, Polarization, Mirrors, Computing systems, Scatter measurement

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SPIE Journal Paper | 1 April 1994

Backscattering from particulate surfaces: experiment and theoretical modeling

Jose Saiz, Pedro Valle, Francisco Gonzalez, Fernando Moreno, David Jordan

OE, Vol. 33, Issue 04, (April 1994) https://doi.org/10.1117/12.10.1117/12.163137

KEYWORDS: Particles, Polarization, Scattering, Backscatter, Light scattering, Electromagnetic scattering, Gold, Mie scattering, Radar, Electromagnetic radiation

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Proceedings Article | 26 July 1993 Paper

Experimental study of cross-polarized light scattering of spherical particles on conducting flat substrates

F. Gonzalez

Proceedings Volume 1983, 19833U (1993) https://doi.org/10.1117/12.2308557

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Proceedings Article | 1 March 1992 Open Access

Simple experimental technique for measuring lifetimes of low-intensity monoexponential fluorescence signals

Fernando Moreno, R. Lopez, P. Valle Herrero, Jose Saiz, Francisco Gonzalez

Proceedings Volume 1603, (1992) https://doi.org/10.1117/12.57883

KEYWORDS: Luminescence, Lab on a chip, Computer simulations, Fourier transforms, Photon counting, Solid state physics, Information operations, Crystals, Solids, Dispersion

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Proceedings Article | 1 July 1990 Paper

Dynamic depolarized light-scattering analysis of rodlike particles by means of a Laplace transform method

Jose Saiz, Francisco Gonzalez

Proceedings Volume 1319, (1990) https://doi.org/10.1117/12.34852

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Proceedings Article | 1 May 1990 Paper

Analysis of multiexponential decays through a sine transform method in single-photon decay spectroscopy experiments

Fernando Moreno, R. Lopez, Francisco Gonzalez

Proceedings Volume 1204, (1990) https://doi.org/10.1117/12.17732

KEYWORDS: Luminescence, Spectroscopy, Signal processing, Single photon, Computer simulations, Time metrology, Laser spectroscopy, Biochemistry, Fourier transforms, Fluorescence spectroscopy

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Showing 5 of 26 publications

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