Listar por autor "Halir, Robert"
Mostrando ítems 21-40 de 65
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Diseño de grating couplers de orden cero de banda ancha y alta eficiencia para el infrarrojo medio
Sánchez-Postigo, Alejandro; Wanguemert-Pérez, Juan Gonzalo
; Luque-González, José Manuel; Molina-Fernández, Íñigo; Cheben, Pavel; Halir, Robert; Schmid, Jens H.; Ortega-Moñux, Alejandro[et al.] (2017-09-27)
The mode fields of optical fibers and high-index contrast photonic waveguides have different dimensions, making difficult the coupling of light from one to the other. To solve this problem, surface grating couplers are one ... -
Dispositivos de interferencia multimodal 2×2 de banda ultraancha basados en estructuras periódicas sub-longitud de onda para las bandas O-E-S-C
Pérez-Armenta, Carlos; Ortega-Moñux, Alejandro; Luque-González, José Manuel; Halir, Robert; Schmid, Jens H.; Cheben, Pavel; Molina-Fernández, Íñigo; Wanguemert-Pérez, Juan Gonzalo[et al.] (2021)
Los dispositivos de interferencia multimodal (MMI) son un bloque funcional fundamental en óptica integrada. La creciente demanda de capacidad en los enlaces de comunicaciones ópticas motiva la búsqueda de nuevas formas de ... -
Engineering sub-wavelength silicon waveguides for sensing applications in the near-infrared and mid-infrared band
Wanguemert-Pérez, Juan Gonzalo; Sánchez-Postigo, Alejandro; Hadij-El-Houati, Abdelfettah; Leuermann, Jonas; Pérez-Armenta, Carlos; Luque-González, José Manuel; Ortega-Moñux, Alejandro; Halir, Robert; Molina-Fernández, Íñigo; Cheben, Pavel; Xu, Dan-Xia; Schmid, Jens H.; Ctyroky, Jiri; Soler-Penades, Jordi; Nedeljkovic, Milos; Mashanovich, Goran Z.[et al.] (2019-02-08)
Silicon photonics is one of the most promising candidates to achieve lab-on-a-chip systems. Making use of the evanescent-field sensing principle, it is possible to determine the presence and concentration of substances by ... -
Engineering the optical properties of silicon using sub-wavelength structures
Halir, Robert; Ortega-Moñux, Alejandro; Maese-Novo, Alejandro; Pérez-Galacho, Diego; Zavargo-Peche, Luis; Molina-Fernández, Íñigo; Wanguemert-Pérez, Juan Gonzalo; Cheben, Pavel; Schmid, Jens H.; Xu, Dan-Xia; Janz, Siegfried; Fedeli, Jean-Marc[et al.] (IEEE Photonics Society, 2013)
In most integrated optics platforms, including silicon-on-insulator, only minor modifications in refractive index are possible. The geometry of the waveguiding structure is thus the only degree of freedom for the design ... -
Enhanced sensitivity subwavelength grating waveguides for silicon photonics sensing applications
Wanguemert-Pérez, Juan Gonzalo; Hadij-El-Houati, Abdelfettah; Sánchez-Postigo, Alejandro; Leuermann, Jonas; Pereira-Martín, Daniel; Luque-González, José Manuel; Cheben, Pavel; Xu, Dan-Xia; Schmid, Jens H.; Ctyroky, Jiri; Soler-Penades, Jordi; Nedeljkovic, Milos; Mashanovich, Goran Z.; Ortega-Moñux, Alejandro; Halir, Robert; Molina-Fernández, Íñigo[et al.] (2019-07-16)
In this work we will review the enormous potential of subwavelength grating waveguides for sensing applications in the near and mid-infrared bands, demonstrating the capability to engineer the mode profile to maximize the ... -
Estructuras sub-longutud de onda para el diseño de dispositivos en guía dieléctrica
Ortega-Moñux, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Halir, Robert; Cheben, Pavel; Godoy-Rubio, Rafael; De-Oliva-Rubio, José; Sánchez-Postigo, Alejandro; Luque-González, José Manuel; Sarmiento-Merenguel, Jose Darío; Soler-Penades, Jordi; Nedeljkovic, Milos; Mashanovich, Goran Z.; Molina-Fernández, Íñigo[et al.] (Juan Córcoles Ortega et al., 2016)
Sub-wavelength structures are enabling the design of devices based in dielectric waveguides with unprecedented performance in both the near-infrared and mid-infrared wavelength regions. These devices include fiber-to-chip ... -
Estudio comparativo de biosensors coherentes basados en estructuras interferométricas y resonantes
Molina-Fernández, Íñigo; Leuermann, Jonas; Ortega-Moñux, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Halir, Robert (2019-06-18)
La gran mayoría de los biosensores fotónicos de campo evanescente se basan en arquitecturas interferométricas o resonantes. La determinación analítica del límite de detección (LOD) alcanzable con estas arquitecturas es muy ... -
High performance and small footprint spot size converters based on SWG metamaterial lenses
Luque-González, José Manuel; Molina-Fernández, Íñigo; Ortega-Moñux, Alejandro; Halir, Robert; Schmid, Jens H.; Cheben, Pavel[et al.] (2018-06-28)
Spot size converters with high expansion ratio are required in a variety of situations. This is the case of non-focusing Silicon on Insulator (SOI) fiber-to-chip grating couplers, which typically require long adiabatic ... -
High performance silicon photonic devices based on practical metamaterials
Halir, Robert; Luque-González, José Manuel; Sánchez-Postigo, Alejandro; Herrero-Bermello, Alaine; González-Andrade, David; Hadij-El-Houati, Abdelfettah; Leuermann, Jonas; Pereira-Martín, Daniel; Ortega-Moñux, Alejandro; Ctyroky, Jiri; Wanguemert-Pérez, Juan Gonzalo; Velasco, Aitor V.; Sánchez-Rodriguez, Marina; De-Oliva-Rubio, José; Schmid, Jens H.; Soler-Penades, Jordi; Nedeljkovic, Milos; Mashanovich, Goran Z.; Cheben, Pavel; Molina-Fernández, Íñigo[et al.] (2019-07-15)
Subwavelength grating metamaterials are enabling a new generation of high-performance silicon photonic devices. Here we discuss the fundamental physics along with some of the latest advances in this rapidly expanding field. -
High performance TM-pass polarizer via subwavelength grating bandgap engineering
Barona-Ruiz, Miguel; Pérez-Armenta, Carlos; Ortega-Moñux, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Molina-Fernández, Íñigo; Cheben, Pavel; Halir, Robert[et al.] (2023-04-05)
Silicon photonics systems exhibit a strong birefrin- gence which makes polarization management critical. Here we demonstrate, with full 3D-FDTD simulations, a low-loss and high- extinction ratio TM-pass polarizer based on ... -
High-Performance Bimodal Evanescent-Field Sensor with Coherent Phase Readout
Torres-Cubillo, Antonia; Luque-González, José Manuel; Sánchez-Postigo, Alejandro; Fernández-Gavela, Adrián; Wanguemert-Pérez, Juan Gonzalo; Molina-Fernández, Íñigo; Halir, Robert[et al.] (IEEE, 2023-12-13)
By comparing optical signals travelling through a sensing and a reference arm, interferometric photonic sensors achieve remarkable sensitivities and detection limits using sim- ple single-wavelength laser sources. Sensors ... -
Integrated coherent reception and polarization management for next generation access networks.
(UMA Editorial, 2017-10-30)La fotónica, entendida como la ciencia de generar, detectar y manipular la luz, subyace bajo infinidad de tecnologías desde su aparición a principios de los años 60. Existe un amplio abanico de aplicaciones fotónicas que ... -
Low limit of detection silicon photonic sensor with extremely-low-cost laser source
Leuermann, Jonas; Fernández-Gavela, Adrián; Lechuga, Laura M.; Sánchez-Postigo, Alejandro; Halir, Robert; Molina-Fernández, Íñigo[et al.] (2020-10-06)
Integrated photonic biosensors have demonstrated low bulk detection limits down to 1e−7 refractive index units. Nevertheless, most rely on expensive optical sources, such as DFB lasers. Here, we experimentally demonstrate ... -
Low-loss curved waveguide grating wavelength demultiplexer
Hadij-El-Houati, Abdelfettah; Ortega-Moñux, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Halir, Robert; Wang, Shurui; Schmid, Jens H.; Cheben, Pavel; Molina-Fernández, Íñigo[et al.] (2021)
We demonstrate a compact wavelength demultiplexer for the silicon on insulator platform based on the curved waveguide grating (CWG) architecture. We mitigate off-chip radiation loss by enforcing the single beam condition ... -
Metamaterial engineered C+L band 90º hybrid with 150 nm feature size
Hadij-El-Houati, Abdelfettah; Halir, Robert; Ortega-Moñux, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Podmore, Hugh; Schmid, Jens H.; Cheben, Pavel; Molina-Fernández, Íñigo[et al.] (2020-09-28)
90º hybrids are important components for coherent optical communications. Conventional implementations only cover the C band, while broadband, metamaterial-based devices require sub-100nm feature sizes. We propose a ... -
Mid-infrared Suspended Waveguide Platform and Building Blocks
Wanguemert-Pérez, Juan Gonzalo; Sánchez-Postigo, Alejandro; Soler-Penades, Jordi; Ortega-Moñux, Alejandro; Nedeljkovic, Milos; Halir, Robert; El Mokhtari Mimun, Faysal; Cheng, Y.X.; Qu, Z; Khokhar, Ali Z.; Osman, A.; Cao, Wei; Litteljohns, C.G.; Cheben, Pavel; Mashanovich, Goran Z.; Molina-Fernández, Íñigo[et al.] (2018-06-05)
In this work we present our recent progress in the development of a platform for the mid-infrared wavelength range, based on suspended silicon waveguide with subwavelength metamaterial cladding. The platform has some ... -
Mitigating reflections in integrated gas sensors
Torres-Cubillo, Antonia; Wanguemert-Pérez, Juan Gonzalo; Sánchez-Postigo, Alejandro; Molina-Fernández, Íñigo; Halir, Robert (2022-09-07)
Optical gas sensing for environmental monitoring has become an active research topic in the last decade. Among the different optical sensing configurations, silicon photonic integrated sensors stand as a compact, ... -
Modelado de ruido de una cámara para lectura de biosensores fotónicos multiplexados.
Pérez-Sánchez, Laura; Sánchez-Ramírez, Ana; De-Oliva-Rubio, José; Leuermann, Jonas; Halir, Robert; Ortega-Moñux, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Molina-Fernández, Íñigo[et al.] (2023)
Los biosensores fotónicos basados en arquitecturas interferométricas de Mach-Zehnder con lectura de fase coherente han demostrado ser idóneos para la implementación de dispositivos de diagnóstico compactos, de bajo coste ... -
Photonic Reflectometer on Silicon-on-Insulator
Halir, Robert (Universidad de Málaga, Servicio de Publicaciones, 2010)
A photonic reflectometer on Silicon-on-Insulator is designed and experimentally characterized. The reflectometer is a six-port device, composed of multimode interference couplers (MMIs). We propose a design approach for ...