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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
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
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[...]texto impreso
Marino, Egidio ; González, Francisco Javier ; Lunar Hernández, Rosario ; Reyes, Jesús ; Medialdea, Teresa ; Castillo Carrión, Mercedes ; Bellido, Eva ; Somoza Losada, Luis | MDPI | 2018-07-02Two Fe–Mn crusts among 35 samples, from six seamounts in the Canary Island Seamount Province, were selected as representatives of the endpoint members of two distinct types of genetic processes, i.e., mixed diagenetic/hydrogenetic and purely hyd[...]texto impreso
Marino, Egidio ; González, Francisco Javier ; Kühn, Thomas ; Madureira, Pedro ; Wegorzewski, Anna V. ; Mirao, Jose ; Medialdea, Teresa ; Oeser, Martin ; Miguel, Catarina ; Reyes Andrés, Jesús ; Somoza Losada, Luis ; Lunar Hernández, Rosario | MDPI | 2019Four pure hydrogenetic, mixed hydrogenetic-diagenetic and hydrogenetic-hydrothermal Fe-Mn Crusts from the Canary Islands Seamount Province have been studied by Micro X-Ray Diffraction, Raman and Fourier-transform infrared spectroscopy together w[...]texto impreso
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[...]texto impreso
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[...]texto impreso
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 [...]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
Briones, Edgar ; Briones, Joel ; Martínez Antón, Juan Carlos ; Cuadrado, Alexander ; McMurtry, Stefan ; Hehn, Michel ; Montaigne, François ; Alda, Javier ; González, Francisco Javier | 2014-12-08Abstract— In this letter we introduce a new type of infrared sensor, based on thermocouple nanoantennas, which enables the energy detection and gathering in the mid-infrared region. The proposed detector combines the Seebeck effect, as a transdu[...]texto impreso
Briones, Edgar ; Briones, Joel ; Cuadrado, Alexander ; Martínez Antón, Juan Carlos ; McMurtry, Stefan ; Hehn, Michel ; Montaigne, François ; Alda, Javier ; González, Francisco Javier | American Institut of Physics | 2014We propose a mid-infrared device based on thermocouple optical antennas for light sensing and energy harvesting applications. We numerically demonstrate that antennas are able to generate low-power dc signals by beneficing of the thermoelectric [...]texto impreso
Briones, Edgar ; Cuadrado, Alexander ; Briones, Joel ; Díaz de León, Ramón ; Martínez-Antón, Juan Carlos ; McMurtry, Stefan ; Hehn, Michel ; Montaigne, François ; Alda, Javier ; González, Francisco Javier | Optical Society of America (OSA) | 2014-09-17Arrays of metallic thermocouples in the shape of spiral nanoantennas are proposed as infrared detectors, which use the thermoelectric properties of the metallic interfaces to generate electrical DC signals. The responsivity of these types of ant[...]texto impreso
Cuadrado Conde, Alexander ; López Alonso, José Manuel ; González, Francisco Javier ; Alda, Javier | Springer Science+Business Media | 2017When optical antennas are used as light detectors, temperature changes their spectral response. Using this relation, we determine the spectrum of a light beam from an optical antenna’s signal. A numerical evaluation of the temperature-spectral r[...]texto impreso
Cuadrado, Alexander ; González, Francisco Javier ; Alda, Javier | 2014-03-24Directional steerability can be obtained for an array of optical antennas through selective heating of the individual elements. Heating changes electrical conductivity of the heated element, which affects the phase of the generated currents. The[...]
