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Documentos disponibles de esta editorial (33)
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Martínez Antón, Juan Carlos ; Plaza Ortega, Juan Manuel ; Alonso Fernández, José | SPIE | 2013-09-06We present an imaging technique for the 3D-form metrology of optical surfaces. It is based on the optical absorption in fluids situated between the surface and a reference. An improved setup with a bi-chromatic light source is fundamental to obt[...]![]()
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Mora Ventura, Brhayllan ; Díaz de León, Ramón ; García Torales, Guillermo ; Flores, Jorge L. ; Alda, Javier ; González, Francisco Javier | SPIE | 2015-09-04Recently thermo-electrical nanoantennas, also known as Seebeck nanoantennas, have been proposed as an alternative for solar energy harvesting applications. In this work we present the optical and thermal analysis of metallic nanoantennas operati[...]![]()
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Cuadrado, Alexander ; López-Alonso, José Manuel ; Martínez Antón, Juan Carlos ; Ezquerro Rodríguez, José Miguel ; González, Francisco Javier ; Alda, Javier | SPIE | 2015-08-28Fractal antennas have been proposed to improve the bandwidth of resonant structures and optical antennas. Their multiband characteristics are of interest in radiofrequency and microwave technologies. In this contribution we link the geometry of [...]![]()
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López Alonso, José Manuel ; Grumel, Eduardo ; Cap, Nelly Lucía ; Trivi, Marcelo ; Rabal, Héctor ; Alda, Javier | SPIE | 2015-09-09Speckle is being used as a characterization tool for the analysis of the dynamic of slow varying phenomena occurring in biological and industrial samples. The retrieved data takes the form of a sequence of speckle images. The analysis of these i[...]![]()
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FDTD algorithms are being used as a numeric tool for the analysis of photonic crystals. The definition of the modes associated with them is of interest for the study of the capabilities of photonic crystal devices. The Principal Component Analys[...]![]()
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López Alonso, José Manuel ; Grumel, Eduardo ; Cap, Nelly Lucía ; Trivi, Marcelo ; Rabal, Héctor ; Alda Serrano, Javier | SPIE | 2016-12Abstract. Speckle is being used as a characterization tool for the analysis of the dynamics of slow-varying phenomena occurring in biological and industrial samples at the surface or near-surface regions. The retrieved data take the form of a s[...]![]()
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Zoido Chamorro, Jesús Manuel ; Vázquez Moliní, Daniel ; Álvarez Fernández-Balbuena, Antonio ; Bernabeu Martínez, Eusebio ; García Botella, Ángel ; Herráenz Ferreiro, Juan Antonio ; Egido Rodríguez, Marian, del | SPIE | 2009-08-22This work is intended to deal with the problems which arise when illuminanting Paleolithic cave paintings. We have carried out the spectral and colorimetric characterization of some paintings located in the Murcielagos (bats) cave (Zuheros, Córd[...]![]()
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González, Diego ; Botella Juan, Guillermo ; García Sanchez, Carlos ; Meyer Bäse, Anke ; Meyer Bäse, Uwe ; Prieto Matías, Manuel | SPIE | 2015-02-27This study focuses on accelerating the optimization of motion estimation algorithms, which are widely used in video coding standards, by using both the paradigm based on Altera Custom Instructions as well as the efficient combination of SDRAM an[...]![]()
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Cuadrado, Alexander ; López-Alonso, José Manuel ; Martínez Antón, Juan Carlos ; Ezquerro Rodríguez, José Miguel ; González, Francisco Javier ; Alda, Javier | SPIE | 2015-08-28The practical application of optical antennas in detection devices strongly depends on its ability to produce an acceptable signal-to-noise ratio for the given task. It is known that, due to the intrinsic problems arising from its sub-wavelength[...]![]()
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García Fernández, Berta ; Álvarez Fernández-Balbuena, Antonio ; Vázquez Moliní, Daniel | SPIE | 2019-09-09Prismatic film offer advantages such as the possibility of transmit light effectively in lighting applications with the benefit of reducing energy consumption. This paper presents several developments based on their characteristics which allow d[...]![]()
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García Botella, Ángel ; Vázquez Moliní, Daniel ; García Fernández, Berta ; Álvarez Fernández-Balbuena, Antonio | SPIE | 2019The electric lighting is responsible for 15% of the electricity consumption, the efficiency in this sector has a good progress in recent years, it can still improve more. Conventional energy sources are polluting and limited, so it is essential [...]![]()
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Zn_2GeO_4 is a novel transparent conductive oxide material, with an ultra-wide band gap of 4.5 eV, and rather good electrical conductivity. Zn_2GeO_4 nano-and microwires grown by a thermal technique show two intense emission bands centered in t[...]![]()
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García Botella, Ángel ; Vázquez Moliní, Daniel ; García Fernández, Berta ; Álvarez Fernández-Balbuena, Antonio | SPIE | 2019-09-09Evolutionary optimization algorithms have been recently introduced as nonimaging optics design techniques. Unlike optimization of imaging systems, non sequential ray tracing simulations and complex non centred systems design must be considered, [...]![]()
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Alonso Orts, Manuel ; Nogales Díaz, Emilio ; San Juan, José M. ; Nó, Maria L. ; Méndez Martín, Bianchi | SPIE | 2019On one hand, interest on the tunability of the optical microcavities has increased in the last few years due to the need for selective nano-and microscale light sources to be used as photonic building blocks in several applications. On the other[...]![]()
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Ramos Zapata, Gonzalo ; Belenguer Dávila, Tomás ; Balado, Ana ; Encinas, José M. ; Armendáriz, Iñaki ; Carretero, Ángel ; Arza, César ; Alcacera, María A. ; Fernández, José A. ; Muñóz, Elisa ; Tinetti, Giovanna ; Eccleston, Paul ; Swinyard, Bruce ; Middleton, Kevin ; Bryson, Ian ; Zapatero, Mª Rosa | SPIE | 2014-08-28EChO (Exoplanet atmospheres Characterization Observatory), a proposal for exoplanets exploration space mission, is considered the next step for planetary atmospheres characterization. It would be a dedicated observatory to uncover a large select[...]![]()
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Diffraction gratings are not always ideal but, due to the fabrication process, several errors can be produced. In this work we show that when the strips of a binary phase diffraction grating present certain randomness in their height, the intens[...]![]()
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The Finite-Difference Time Domain method has encountered several difficulties when analyzing dispersive materials. This is the case of the metal structures that configure an optical antenna. These devices couple the electromagnetic radiation to [...]![]()
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Rico-García, José María ; López-Alonso, José Manuel ; Lail, Brian ; Boreman, Glenn ; Alda, Javier | SPIE | 2004-12-06Fresnel Zone Plate Lenses (FZPLs) have been successfully coupled to infrared (IR) antennas producing a responsivity enhancement of about two orders of magnitude. However, their lateral extension may compromise their applicability in focal-plane-[...]![]()
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Rodriguez Schwendtner, E. ; Navarrete Fernández, María Cruz ; Esteban, Óscar ; Díaz Herrera, Natalia ; González Cano, Agustín | SPIE | 2015In this work, we show the feasibility of using the evanescent field of a microfiber to excite the fluorescence of a fluorophore deposited on the surface of a polymer optical fiber. The fluorescence intensity gathered by the polymer optical fiber[...]![]()
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Ultrathin amorphous silicon hydrogenated (aSi-H) solar cells grown on a one-dimensional (1-D) dielectric subwavelength gratings improve the short circuit current by a factor of more than 51% when compared with conventional, flat ultrathin aSi-H [...]![]()
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Vázquez Moliní, Daniel ; González Cano, Agustín ; Díaz Herrera, Natalia ; Llombart, N. ; Alda, Javier | SPIE | 2012-10-15The history of optics is a very rich field of science and it is possible to find many simple and significant examples of the application and success of the experimental method and therefore is a very good tool to transmit to the student the way [...]![]()
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Vázquez Moliní, Daniel ; Álvarez Fernández Balbuena, Antonio ; García Botella, Ángel ; Alda, Javier | SPIE | 2015-08-25In this contribution the line flow method is applied to an optimized secondary optics in a photovoltaic concentration system where the primary optics is already defined and characterized. This method is a particular application of photic field t[...]![]()
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Martínez Antón, Juan Carlos ; Vázquez Moliní, Daniel ; Muñóz de la Luna, Javier ; Gómez Pedrero, José Antonio ; Álvarez Fernández-Balbuena, Antonio | SPIE | 2011-09-21Fresnel lenses and other faceted or micro-optic devices are increasingly used in multiple applications like solar light concentrators and illumination devices, just to name some representative. However, it seems to be a certain lack of adequate [...]![]()
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Photonic crystal microcavities are defined by the spatial arrangement of materials. In the analysis of their spatial temporal mode distributions Finite-Difference Time-Domain (FDTD) methods have proved its validity. The output of the FDTD can be[...]![]()
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Vázquez Moliní, Daniel ; Muñoz de Luna Clemente, Javier ; Álvarez Fernández-Balbuena, Antonio ; García Botella, Ángel ; Belloni, Paola ; Alda, Javier | SPIE | 2012-10-15One of the key challenges in the teaching of Optics is that students need to know not only the math of the optical design, but also, and more important, to grasp and understand the optics in a three-dimensional space. Having a clear image of the[...]