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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[...]texto impreso
We propose in this work a model for describing visual acuity (VV) as a function of defocus and pupil diameter. Although the model is mainly based on geometrical optics, it also incorporates nongeometrical effects phenomenologically. Compared to [...]texto impreso
Bértolo, Helder ; Mestre, Tiago ; Barrio de Santos, Ana Rosa ; Antona Peñalba, Beatriz | SPIE | 2017-12-22Our objective was to evaluate rapid eye movements (REMs) associated with visual dream recall in sighted subjects and congenital blind. During two consecutive nights polysomnographic recordings were performed at subjects home. REMs were detected [...]texto impreso
Cuadrado, Alexander ; Silva-López, Manuel ; López-Alonso, José Manuel ; Martínez Antón, Juan Carlos ; Ezquerro Rodríguez, José Miguel ; González, Francisco Javier ; Alda, Javier | SPIE | 2015-08-28One of the main technical difficulties in the fabrication of optical antennas working as light detectors is the proper design and manufacture of auxiliary elements as load lines and signal extraction structures. These elements need to be quite s[...]texto impreso
Mora Ventura, Brhayllan ; Díaz de León, Ramón ; García Torales, Guillermo ; Flores, Jorge L. ; Alda, Javier ; González, Francisco J. | SPIE | 2016-05-02Seebeck nanoantennas, which are based on the thermoelectric effect, have been proposed for electromagnetic energy harvesting and infrared detection. The responsivity and frequency dependence of three types of Seebeck nanoantennas is obtained by [...]texto impreso
Pastor Sempere, Carmen ; Jellema, Willem ; Zuluaga Ramírez, Pablo ; Arrazola, David ; Fernández Rodríguez, M. ; Belenguer Dávila, Tomás ; González Fernández, Luis M. ; Audley, Michael D. ; Evers, Jaap ; Eggens, Martin ; Torres Redondo, Josefina ; Najarro, Francisco ; Roelfsema, Peter | SPIE | 2016SpicA FAR infrared Instrument, SAFARI, is one of the instruments planned for the SPICA mission. The SPICA mission is the next great leap forward in space-based far-infrared astronomy and will study the evolution of galaxies, stars and planetary [...]texto impreso
Alda, Javier ; López Alonso, José Manuel ; Rico García, José María ; Zoido Chamorro, Jesús Manuel ; Boreman, Glenn | SPIE | 2004-04-15The miniaturization of light detectors in the visible and infrared has produced devices with micrometric and sub-micrometric spatial features. Some of these spatial features are closely linked with the physical mechanism of detection. An example[...]texto impreso
In this article we report on the activities in Spain related to the celebration of the International Day of Light (IDL). The Spanish Committee for the IDL was constituted in 2017, as a continuation of the previous Committee for the International[...]