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Autor Alda, Javier |
Documentos disponibles escritos por este autor (63)
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Elshorbagy, Mahmoud Hamdy Mohamed ; Cuadrado Conde, Alexander ; Alda, Javier | OSA Publishing | 2017A metallic nanostructured array that scatters radiation toward a thin metallic layer generates surface plasmon resonances for normally incident light. The location of the minimum of the spectral reflectivity serves to detect changes in the index[...]![]()
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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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Álvarez Fernández-Balbuena, Antonio ; Vázquez Moliní, Daniel ; Alda, Javier ; Bernabeu Martínez, Eusebio | Spie-Soc Photo-Optical Instrumentation Engineers | 2006-07The flux transfer efficiency of an optical array with spatial integration has been improved by adding a new element at the input surface. The optical characteristics of the input surfaces of the individual units do not affect the spatial integra[...]![]()
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Gómez Pedrero, José Antonio ; Alda, Javier ; Aradian, Ashod ; Delair, Stephanie ; Flexer, Victoria ; Veltri, Alessandrofac | Facultad de Optica y Optometría | 2015Tabla de contenido: Introducción por José A. Gómez Pedrero...3 Ciencia y Deporte por Luis M. Sánchez Brea ....6 El lugar de Chema por Javier Alda ....8 Memories of José María in Bordeaux (Recuerdos de José María en Burdeos) por Ashod Aradian ...[...]![]()
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Mennemanteouil, Marie-Maxime ; Colas-des-Francs, Gérard ; Buret, Mickaël ; Dasgupta, Arindam ; Cuadrado, Alexander ; Alda, Javier ; Bouhelier, Alexandre | Gruyter | 2018-10-11Electrically biased metal nanostructures are at the core of innovative multifunctional integrated devices that control the flow of electrons and photons at the nanoscale. They are based on plasmonic structures that create strongly confined field[...]![]()
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Silva López, Manuel ; Rico-García, José María ; Alda, Javier | The Optical Society Of America | 2012-10-08An experimental setup to measure the three-dimensional phase-intensity distribution of an infrared laser beam in the focal region has been presented. It is based on the knife-edge method to perform a tomographic reconstruction and on a transport[...]![]()
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Alda, Javier ; Rico-García, José María ; López-Alonso, José Manuel ; Boreman, Glenn | Egyptian Society of Solid State Science & Applications | 2005Antenna-coupled optical detectors, also named as optical antennas, are being developed as detection devices with micro- and nano-scale features for their use in the millimetre, infrared, and visible spectral range. They are optical components th[...]![]()
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Bueno, Juan ; López Camacho, Elena ; Silva-López, Manuel ; Rico-García, José María ; Llombart, N ; Alda, Javier ; Costa-Krämer, José Luis | Elsevier | 2013-11Silicon microlenses are a very important tool for coupling terahertz (THz) radiation into antennas and detectors in integrated circuits. They can be used in a large array structures at this frequency range reducing considerably the crosstalk bet[...]![]()
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Monochromatic aberrations in resonant optical elements applied to a focusing multilevel reflectarray
The monochromatic aberrations produced by the phase distribution reflected by resonant sub-wavelength metallic structures are studied both analytically and numerically. Even for normal incidence, the angular dependence of the re-radiated wavefro[...]![]()
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This work reports on a computational analysis of how a modified perovskite cell can work as a refractometric sensor by generating surface plasmon resonances at its front surface. Metal-dielectric interfaces are necessary to excite plasmonic reso[...]![]()
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Finite-difference time-domain (FDTD) algorithms are affected by numerical artifacts and noise. In order to obtain better results we propose the use of the principal component analysis based on multivariate statistical techniques. It allows a str[...]![]()
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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[...]![]()
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Rueda Ordax, Gloria María ; Alda, Javier ; Bernabeu Martínez, Eusebio | Gustav Fischer Verlag | 1999The maximum or minimum character of the optical path is analyzed when the angle of incidence on a dielectric sphere is near the limit angle and the object point is close to the Weierstrass object point.![]()
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Cuadrado Conde, Alexander ; Toudert, Johan Aristippe Michael ; García Cámara, Braulio ; Vergaz Benito, Ricardo ; González, Francisco Javier ; Alda, Javier ; Serna Galán, Rosalía | IEEE (Institute of Electrical and Electronics Engineers) | 2016-12-13Plasmonic nanostructures can be described by equivalent impedance, allowing the analysis of their properties and performance by an RLC circuit equivalent model. In this letter, the equivalent impedance has been obtained from a power budget calcu[...]![]()
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Alda, Javier ; Salgado Remacha, Francisco Javier ; Sánchez Brea, Luis Miguel ; Rico-García, José María ; González, Francisco Javier | IEEE | 2010Polygonal Fresnel zone plates can be configured in a variety of forms depending on the number of sides of the polygon and the number of phase steps used. This contribution deals with some specific polygonal designs that tessellate the plane: tri[...]![]()
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Rico-García, José María ; Salgado Remacha, Francisco Javier ; Sánchez Brea, Luis Miguel ; Alda, Javier | SPIE | 2009-06-17Polygonal Fresnel zone plates with a low number of sides have deserved attention in micro and nanoptics, because they can be straightforwardly integrated in photonic devices, and, at the same time, they represent a balance between the high-focus[...]![]()
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Elshorbagy, Mahmoud Hamdy Mohamed ; Cuadrado Conde, Alexander ; Gómez Pedrero, José Antonio ; Alda, Javier | MDPI | 2020-02-11The bolometric effect allows us to electrically monitor spectral characteristics of plasmonic sensors; it provides a lower cost and simpler sample characterization compared with angular and spectral signal retrieval techniques. In our device, a [...]![]()
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Elshorbagy, Mahmoud Hamdy Mohamed ; Cuadrado Conde, Alexander ; González Contreras, Gabriel ; González Contreras, Francisco Javier ; Alda, Javier | IEEE | 2019-03-27In this paper, we present a plasmonic refractometric sensor that works under normal incidence; allowing its integration on a fiber tip. The sensor's material and geometry exploit the large scattering cross-section given by high-contrast of the i[...]![]()
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Moreno, Camilo ; Alda, Javier ; Kinzel, Edward ; Boreman, Glenn | The Optical Society Of America | 2017-02When considering the pseudo-heterodyne mode for detection of the modulus and phase of the near field from scattering scanning near-field optical microscopy (s-SNOM) measurements, processing only the modulus of the signal may produce an undesired[...]![]()
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We demonstrate the capabilities of principal component analysis (PCA) for studying the results of finite-difference time-domain (FDTD) algorithms in simulating photonic crystal microcavities. The spatial-temporal structures provided by PCA are r[...]![]()
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Vázquez Moliní, Daniel ; Alda, Javier ; Bernabeu Martínez, Eusebio | The Optical Society Of America | 1999-03-01A planar optical array is presented that provides a selective concentration of the light incident upon the system onto a given area. Several alternative designs are analyzed and explained geometrically. The photometric calculation is presented f[...]![]()
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Elshorbagy, Mahmoud Hamdy Mohamed ; Cuadrado Conde, Alexander ; Alda, Javier | Springer Science+Business Media | 2020-01-03We present a refractometric sensor realized as a stack of metallic gratings with subwavelength features and embedded within a low-index dielectric medium. Light is strongly confined through funneling mechanisms and excites resonances that sense [...]![]()
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Cuadrado, Alexander ; Briones, Edgar ; González, Francisco Javier ; Alda, Javier | Optical Society of America (OSA) | 2014-05-30Optical nanoantennas made of two metals are proposed to produce a Seebeck voltage proportional to the Stokes parameters of a light beam. The analysis is made using simulations in the electromagnetic and thermal domains. Each Stokes parameter is [...]