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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 [...]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
Mennemanteouil, Marie-Maxime ; Colas-des-Francs, Gérard ; Buret, Mickaël ; Dasgupta, Arindam ; Cuadrado, Alexander ; Alda, Javier ; Bouhelier, Alexandre | Gruyter | 2018-10-11Electrically biased metal nanostructures are at the core of innovative multifunctional integrated devices that control the flow of electrons and photons at the nanoscale. They are based on plasmonic structures that create strongly confined field[...]texto impreso
This work reports on a computational analysis of how a modified perovskite cell can work as a refractometric sensor by generating surface plasmon resonances at its front surface. Metal-dielectric interfaces are necessary to excite plasmonic reso[...]texto impreso
Cuadrado, Alexander ; Sánchez Brea, Luis Miguel ; Torcal Milla, Francisco José ; Quiroga, Juan Antonio ; Gómez Pedrero, José Antonio | Optical Society of America | 2019-05-01We present in this work a numerical model for characterizing the scattering properties of the human lens. After analyzing the scattering properties of two main scattering particles actually described in the literature through FEM (finite element[...]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, 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[...]
