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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
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 [...]texto impreso
Elshorbagy, Mahmoud Hamdy Mohamed ; Cuadrado Conde, Alexander ; Romero Martínez, Beatriz ; Alda, Javier | Nature Publishing Group | 2020-05-08Perovskite solar cells are currently considered a promising technology for solar energy harvesting. Their capability to deliver an electrical signal when illuminated can sense changes in environmental parameters. We have numerically analyzed the[...]texto impreso
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Elshorbagy, Mahmoud Hamdy Mohamed ; Cuadrado Conde, Alexander ; Alda, Javier | OSA Publishing | 2017A metallic nanostructured array that scatters radiation toward a thin metallic layer generates surface plasmon resonances for normally incident light. The location of the minimum of the spectral reflectivity serves to detect changes in the index[...]texto impreso
Cuadrado Conde, Alexander ; Sánchez Brea, Luis Miguel ; Torcal Milla, Francisco José ; Quiroga Mellado, Juan Antonio ; Gómez Pedrero, José Antonio | OSA Publishing | 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 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
Sánchez Brea, Luis Miguel ; Torcal Milla, Francisco José ; Hoyo Muñoz, Jesús del ; Cuadrado Conde, Alexander ; Gómez Pedrero, José Antonio | IOP Publishing, Ltd. | 2020-04-02Conventional refractive lenses concentrate the incident light at focal distance. A narrow beam waist can be achieved by increasing the lens numerical aperture, but strongly reduces the depth of focus. In this paper, we explore diffractive lenses[...]texto impreso
Elshorbagy, Mahmoud Hamdy Mohamed ; Cuadrado Conde, Alexander ; Gómez Pedrero, José Antonio ; Alda, Javier | MDPI | 2020-02-11The bolometric effect allows us to electrically monitor spectral characteristics of plasmonic sensors; it provides a lower cost and simpler sample characterization compared with angular and spectral signal retrieval techniques. In our device, a [...]texto impreso
Elshorbagy, Mahmoud Hamdy Mohamed ; Cuadrado Conde, Alexander ; González Contreras, Gabriel ; González Contreras, Francisco Javier ; Alda, Javier | IEEE | 2019-03-27In this paper, we present a plasmonic refractometric sensor that works under normal incidence; allowing its integration on a fiber tip. The sensor's material and geometry exploit the large scattering cross-section given by high-contrast of the i[...]texto impreso
Elshorbagy, Mahmoud Hamdy Mohamed ; Cuadrado Conde, Alexander ; Alda, Javier | Springer Science+Business Media | 2020-01-03We present a refractometric sensor realized as a stack of metallic gratings with subwavelength features and embedded within a low-index dielectric medium. Light is strongly confined through funneling mechanisms and excites resonances that sense [...]texto impreso
Cuadrado Conde, Alexander ; Toudert, Johan Aristippe Michael ; Serna Galán, Rosalía | IEEE (Institute of Electrical and Electronics Engineers) | 2016-06-01In the quest to unveil alternative plasmonic elements overcoming noble metals for selected applications in photonics, we investigate, by numerical simulations, the near ultraviolet (UV)-to-near infrared optical response of solid and liquid Bi na[...]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
Elshorbagy, Mahmoud Hamdy Mohamed ; Cuadrado Conde, Alexander ; García Cámara, Braulio ; Vergaz Benito, Ricardo ; Gómez Pedrero, José Antonio ; Alda, Javier | IEEE | 2019-12-18We configure and analyze a nanostructured device that hybridizes grating modes and surface plasmon resonances. The model uses an effective index of refraction that considers the volume fraction of the involved materials, and the propagation dept[...]
