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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[...]texto impreso
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 [...]texto impreso
Abstract The longitudinal and transverse angular shifts in the refraction of a paraxial beam are calculated by using the plane-wave decomposition of the amplitude of the electric field distribution of the incident beam. The transmission coeffici[...]texto impreso
Alda, Javier ; López-Alonso, José Manuel ; Boreman, Glenn ; Rico-García, José María | Puntex | 2005-05La investigación sobre el comportamiento de estructuras metálicas cuyo tamaño es comparable a la longitud de onda de la radiación detectada puede realizarse considerándolas como antenas detectoras de radiación óptica. El diseño, análisis y carac[...]texto impreso
Se ha aplicado una herramienta automática de análisis de textos, Wordsmith, para la obtención de información cuantitativa acerca del contenido de foros en un entorno de enseñanza virtual sin requerir la intervención humana en su lectura. Se ha p[...]texto impreso
Rico-García, José María ; Sánchez Brea, Luis Miguel ; Alda, Javier | The Optical Society Of America | 2008-02-20A tomographiclike method based on the inverse radon transform is used to retrieve the irradiance map of a focused laser beam. The results obtained from multiple knife-edge measurements have been processed through a kriging technique. This techni[...]texto impreso
Elshorbagy, Mahmoud Hamdy Mohamed ; Abdel-Hady, Kamal ; Kamal, Hala ; Alda, Javier | Elsevier Science BV | 2017-01-07Absorption of amorphous-Si hydrogenated (aSi-H) solar cells can be enhanced by using dielectric nanostructures made of Si3N4 that work like antireflection coatings. The analysis focus on the short-circuit current delivered by the cell under sola[...]texto impreso
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[...]texto impreso
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[...]texto impreso
Rico-García, José María ; López-Alonso, José Manuel ; Alda, Javier | OSA (Optical Society of America) Publishing | 2005-05-16The manufacture of a photonic crystal always produce deviations from the ideal case. In this paper we present a detailed analysis of the influence of the manufacture errors in the resulting electric field distribution of a photonic crystal micro[...]texto impreso
Briones, Edgar ; Briones, Joel ; Cuadrado, Alexander ; Mc Murtry, Stefan ; Hehn, Michel ; Montaigne, François ; Alda, Javier ; González, Francisco Javier | ARXIV | 2014-01-20Thermo-electrical nanoantennas have been proposed as an alternative option for conversion solar energy harvesting applications. In this work, the response of a spiral broadband antenna has been obtained from numerical and theoretical simulations[...]texto impreso
Kamal Abd El-Hady, Hala ; Alda, Javier ; Vázquez Moliní, Daniel ; Bernabeu Martínez, Eusebio | Gustav Fischer Verlag | 2004In this paper we analyze different alternatives in the design of optimized optical arrays having spatial integration feature in a plane arrangement. More specifically, we focus our attention in the evaluation of the number of useful individual u[...]texto impreso
Alda, Javier ; Rico-García, José María ; López-Alonso, José Manuel ; Lail, Brian | Elsevier | 2006-04-15The design of plane Fresnel zone plates, and binary-staircase kinoforms, has been analyzed in this paper for a non-imaging application aimed to increase the performance of point-like detectors. They maximize the irradiance at the focal point of [...]texto impreso
Kolosovas Machuca, Eleazar Samuel ; Cuadrado Conde, Alexander ; Ojeda Galván, Hiram Joazet ; Ortiz Dosal, Luis Carlos ; Hernández Arteaga, Aida Catalina ; Rodríguez Aranda, María del Carmen ; Navarro Contreras, Hugo Ricardo ; Alda, Javier ; González Contreras, Francisco Javier | MDPI | 2019-02-06In this paper, we report a fast and easy method to detect histamine dihydrochloride using gold nanostars in colloidal aqueous solution as a highly active SERS platform with potential applications in biomedicine and food science. This colloid was[...]texto impreso
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[...]
