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20 búsqueda de la palabra clave 'Materia = Ciencias Biomédicas: Óptica y optometría: Optoelectrónica'
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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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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[...]![]()
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González de Alaiza, Pedro ; Babushkin, Ihar ; Bergé, Luc ; Skupin, Stephan ; Cabrera Granado, Eduardo ; Köhler, Christian ; Mörgner, Uwe ; Husakou, Anton V. ; Herrmann, Jens | American Physical Society | 2015-05-06Broadband ultrashort terahertz (THz) pulses can be produced using plasma generation in a noble gas ionized by femtosecond two-color pulses. Here we demonstrate that, by using multiple-frequency laser pulses, one can obtain a waveform which optim[...]![]()
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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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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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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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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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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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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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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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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 [...]