Now showing items 1-20 of 161

    • AC/DC millivoltage sensor by means of ITO-coated optical fibers: towards monitoring of biosignals 

      Aginaga Etxamendi, Concepción Isabel Upna; Socorro Leránoz, Abián Bentor Upna Orcid; Fuentes Lorenzo, Omar Upna; Del Villar, Ignacio Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Matías Maestro, Ignacio Upna Orcid (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This contribution shows the monitoring of AC and DC millivoltage signals by means of lossy mode resonances generated by Indium Tin Oxide (ITO) on optical fibers. Sensors were obtained by sputtering ITO thin-films onto 25 ...
    • Alfalfa quality detection by means of VIS-NIR optical fiber reflection spectroscopy 

      Ruiz Zamarreño, Carlos Upna Orcid; Gracia Moisés, Ander; Vitoria Pascual, Ignacio Upna Orcid; Imas González, José Javier Upna Orcid; Castaño Egues, Lorena Yveth; Avedillo, A.; Matías Maestro, Ignacio Upna Orcid (IEEE, 2022)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A first approach study for the classification of alfalfa (medicago sativa) quality has been performed by means of VIS-NIR optical fiber reflection spectroscopy. Reflection spectral data has been obtained from alfalfa samples ...
    • All fiber interferometer for ice detection 

      Arozarena Arana, Jesús Antonio; Socorro Leránoz, Abián Bentor Upna Orcid; Del Villar, Ignacio Upna Orcid; Díaz Lucas, Silvia Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Optica Publishing Group, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This work presents an etched single-mode - multimode - single-mode structure that detects the solid-to-liquid change of state of the water due to an increased refractive index sensitivity within the 1.308 - 1.321 RIU range
    • All-fiber ellipsometer for nanoscale dielectric coatings 

      Imas González, José Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Del Villar, Ignacio Upna Orcid; Ozcariz Celaya, Aritz Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Albert, Jacques (Chinese Academy of Sciences, 2023)   Artículo / Artikulua  OpenAccess
      Multiple mode resonance shifts in tilted fiber Bragg gratings (TFBGs) are used to simultaneously measure the thickness and the refractive index of TiO2 thin films formed by Atomic Layer Deposition (ALD) on optical fibers. ...
    • Ammonia gas optical sensor based on lossy mode resonances 

      Armas, Dayron; Zubiate Orzanco, Pablo Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Matías Maestro, Ignacio Upna Orcid (IEEE, 2023)   Artículo / Artikulua  OpenAccess
      This letter presents the fabrication and characterization of an ammonia (NH 3) gas optical sensor based on lossy mode resonances (LMRs). A chromium (III) oxide (Cr 2 O 3) thin film deposited onto a planar waveguide was ...
    • Analysis matrix for smart cities 

      Branchi, Pablo Emilio Upna; Fernández Valdivielso, Carlos Upna; Matías Maestro, Ignacio Upna Orcid (MDPI, 2014)   Artículo / Artikulua  OpenAccess
      The current digital revolution has ignited the evolution of communications grids and the development of new schemes for productive systems. Traditional technologic scenarios have been challenged, and Smart Cities have ...
    • An analysis matrix for the assessment of smart city technologies: main results of its application 

      Branchi, Pablo Emilio Upna; Fernández Valdivielso, Carlos Upna; Matías Maestro, Ignacio Upna Orcid (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      The paper presents the main results of a previously developed methodology to better evaluate new technologies in Smart Cities, using a tool to evaluate different systems and technologies regarding their usefulness, considering ...
    • Analysis of one-dimensional photonic band gap structures with a liquid crystal defect towards development of fiber-optic tunable wavelength filters 

      Del Villar, Ignacio Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Claus, Richard O. (Optical Society of America, 2003)   Artículo / Artikulua  OpenAccess
      A theoretical analysis of a fiber optical photonic band gap based tunable wavelength filter is presented. The design presented here is based on the quarter wave reflector with a liquid crystal defect layer in the middle ...
    • An antibacterial coating based on a polymer/sol-gel hybrid matrix loaded with silver nanoparticles 

      Rivero Fuente, Pedro J. Upna Orcid; Urrutia Azcona, Aitor Upna Orcid; Goicoechea Fernández, Javier Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Springer, 2011)   Artículo / Artikulua  OpenAccess
      In this work a novel antibacterial surface composed of an organic-inorganic hybrid matrix of tetraorthosilicate and a polyelectrolyte is presented. A precursor solution of tetraethoxysilane (TEOS) and poly(acrylic acid ...
    • An antibacterial surface coating composed of PAH/SiO2 nanostructurated films by Layer by Layer 

      Urrutia Azcona, Aitor Upna Orcid; Rivero Fuente, Pedro J. Upna Orcid; Ruete Ibarrola, Leyre; Goicoechea Fernández, Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (2009)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this article we propose a novel antibacterial coating composed of SiO2 and the polymer Poly(allylamine hydrochloride) (PAH) on glass slides by the technique Layer-by- Layer (LbL)1. This technique has already used in ...
    • Application of gold complexes in the development of sensors for volatile organic compounds 

      Luquin, Asunción Upna Orcid; Elosúa Aguado, César Upna Orcid; Vergara, Elena; Estella, Juncal Upna; Cerrada, Elena; Bariáin Aisa, Cándido Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Garrido Segovia, Julián José Upna Orcid; Laguna, Mariano (World Gold Council, 2007)   Artículo / Artikulua  OpenAccess
      Two different kinds of sensors have been developed by using the same kind of vapochromic complexes. The vapochromic materials [Au2Ag2(C6F5)(4)L-2](n) have different colours depending on the ligand L. These materials change, ...
    • Asymmetrically and symmetrically coated tapered optical fiber for sensing applications 

      Del Villar, Ignacio Upna Orcid; Socorro Leránoz, Abián Bentor Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid (SPIE, 2015)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The deposition of a non-metallic thin-film in a symmetrically coated tapered optical fiber leads to the generation of resonances due to guidance of a mode in the thin-film. At certain conditions, the resonances overlap ...
    • Beyond near-infrared lossy mode resonances with fluoride glass optical fiber 

      Vitoria Pascual, Ignacio Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Ozcariz Celaya, Aritz Upna Orcid; Imas González, José Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Optica, 2021)   Artículo / Artikulua  OpenAccess
      The objective of this Letter consists of the exploration of the lossy mode resonance (LMR) phenomenon beyond the nearinfrared region and specifically in the short wave infrared region (SWIR) and medium wave infrared region ...
    • Bloch surface wave resonances generated with dielectric stack of high refractive index contrast deposited on a D-shaped optical fiber for sensing applications 

      Del Villar, Ignacio Upna Orcid; Kwietniewski, Norbert; Gonzalez-Valencia, Esteban; Burnat, Dariusz; Armas, Dayron; Pitula, Emil; Matías Maestro, Ignacio Upna Orcid; Chiavaioli, Francesco; Torres, Pedro; Smietana, Mateusz (Optica Publishing Group, 2022)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A 5-layer stack composed of TiO2 and Al2O3, two materials with a high refractive index contrast, was deposited on a D-shaped fiber to generate Bloch surface wave resonances with an improved figure of merit.
    • Ciudad y tecnología. Metodología de estudio para ciudades inteligentes 

      Branchi, Pablo Emilio Upna (2015)   Tesis doctoral / Doktoretza tesia  OpenAccess
      La revolución digital actual ha revolucionado la evolución de las redes de comunicación así como el desarrollo de nuevos esquemas productivos. Los escenarios tecnológicos tradicionales asumen nuevos retos, y las ciudades ...
    • A comparative study between SMS interferometers and lossy mode resonace optical fiber devices for sensing applications 

      Socorro Leránoz, Abián Bentor Upna Orcid; Hernáez Sáenz de Zaitigui, Miguel Upna Orcid; Del Villar, Ignacio Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid (SPIE, 2015)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Optical fiber sensors are of great interest due to their intrinsic advantages over electronic sensors. In this work, the sensing characteristics of two different and novel optical fiber devices are compared, after ...
    • A comparative study in the sensitivity of optical fiber refractometers based on the incorporation of gold nanoparticles into layer-by-layer films 

      Rivero Fuente, Pedro J. Upna Orcid; Hernáez Sáenz de Zaitigui, Miguel Upna Orcid; Goicoechea Fernández, Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (Exeley, 2015)   Artículo / Artikulua  OpenAccess
      In this work, optical fiber refractometers based on the successive incorporation of gold nanoparticles have been fabricated by means of the Layer-by-Layer Embedding (LbL-E) deposition technique. This enables the apparition ...
    • Comparative study of layer-by-layer deposition techniques for poly(sodium phosphate) and poly (allylamine hydrochloride) 

      Elosúa Aguado, César Upna Orcid; López Torres, Diego Upna Orcid; Hernáez Sáenz de Zaitigui, Miguel Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (Springer, 2013)   Artículo / Artikulua  OpenAccess
      An inorganic short chain polymer, poly(sodium phosphate), PSP, together with poly(allylamine hydrochloride), PAH, is used to fabricate layer-by-layer (LbL) films. The thickness, roughness, contact angle, and optical ...
    • A comparative study of two different approaches for the incorporation of silver nanoparticles into layer-by-layer films 

      Rivero Fuente, Pedro J. Upna Orcid; Goicoechea Fernández, Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (Springer, 2014)   Artículo / Artikulua  OpenAccess
      In this work, a comparative study about the incorporation of silver nanoparticles (AgNPs) into thin films is presented using two alternative methods, the in situ synthesis process and the layer-by-layer embedding deposition ...
    • Deposition of an overlay with electrostactic self-assembly method in long period fiber gratings 

      Del Villar, Ignacio Upna Orcid; Achaerandio, Miguel Upna; Matías Maestro, Ignacio Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (Optical Society of America, 2005)   Artículo / Artikulua  OpenAccess
      It was proved that the deposition of an overlay material onto a long-period fiber grating causes important shifts in the wavelengths of the typical attenuation bands that are caused by coupling between cladding and core ...

      El Repositorio ha recibido la ayuda de la Fundación Española para la Ciencia y la Tecnología para la realización de actividades en el ámbito del fomento de la investigación científica de excelencia, en la Línea 2. Repositorios institucionales (convocatoria 2020-2021).
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