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Autor Alda, Javier |
Documentos disponibles escritos por este autor (63)
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Alda, Javier ; Sánchez Brea, Luis Miguel ; Salgado Remacha, Francisco Javier ; Rico-García, José María | John Wiley & SONS INC | 2010-04A diffractive optical element having equal-width concentric square rings is analyzed in this article. This constant width makes possible its realization using spatial light modulators or square pixels phase screens. It allows a simple analytical[...]![]()
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Alda, Javier ; Rico García, José María ; Salgado Remacha, Francisco Javier ; Sánchez Brea, Luis Miguel | Elsevier | 2009-06-14We analyze the optical behavior of square Fresnel zones plates. A theoretical analysis and numerical simulations based on the Rayleigh-Sommerfeld approach have been developed analyzing properties such as the depth of focus and the intensity of t[...]![]()
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Mendez, Javier ; González Contreras, Gabriel ; Cuadrado Conde, Alexander ; Alda, Javier ; González Contreras, Francisco Javier | Institution of Engineering and Technology (IET) | 2018Plasmonic nanoantennas are currently the subject of many theoretical and experimental investigations due to their unique properties and potential applications. In this work, a new type of plasmonic nanoantenna the discrete bowtie nanoantenna is [...]![]()
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López Alonso, José Manuel ; Alda, Javier ; Rabal, Héctor ; Grumel, Eduardo ; Trivi, Marcelo | IOP Publishing Group | 2015-03-01In this work we use principal components analysis to characterize dynamic speckle patterns. This analysis quantitatively identifies different dynamics that could be associated to physical phenomena occurring in the sample. We also found the cont[...]![]()
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Elshorbagy, Mahmoud Hamdy Mohamed ; Cuadrado Conde, Alexander ; Romero Martínez, Beatriz ; Alda, Javier | Nature Publishing Group | 2020-05-08Perovskite solar cells are currently considered a promising technology for solar energy harvesting. Their capability to deliver an electrical signal when illuminated can sense changes in environmental parameters. We have numerically analyzed the[...]![]()
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The far-field scattered in the infrared by an arrangement of metallic structures deposited on a dielectric wafer is estimated in this paper. The scattering is modelled by using operators that describe the far field obtained under the regime appl[...]![]()
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Rueda Ordax, Gloria María ; Alda, Javier ; Bernabeu Martínez, Eusebio | Gustav Fischer Verlag | 2010This paper shows how corneal topographic data can be used to determine the value of the longitudinal spherical aberration. We have obtained the corneal profiles and the values of the longitudinal spherical aberration for the rays propagating wit[...]![]()
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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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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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A few years ago, some of the authors of the paper demonstrated the resonance of optical antennas in the visible frequencies. The results of that paper were obtained using experimental techniques that were primarily developed for the measurement [...]![]()
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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 ...[...]