Listar por autor "Halir, Robert"
Mostrando ítems 1-20 de 57
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A broadband polarization splitter directional coupler based on tilted subwavelengh grating metamaterials
Luque-González, José Manuel; Herrero-Bermello, Alaine; Ortega-Moñux, Alejandro
; Sánchez-Rodriguez, Marina; Velasco, Aitor V.; Schmid, Jens H.; Cheben, Pavel; Molina-Fernandez, Iñigo; Halir, Robert[et al.] (2020-12-03)
Tilted subwavelength gratings (SWG) allows anisotropy tailorable metamaterials with applications in polarization management. Based on this concept, here we experimentally demonstrate a broadband directional-couplerbased ... -
A general approach for robust integrated polarization rotators
Alonso-Ramos, C.; Halir, Robert; Ortega-Moñux, Alejandro; Cheben, Pavel; Vivien, Laurent; Molina-Fernandez, Iñigo; Marris-Morini, Delphine; Janz, Siegfried; Xu, Dan-Xia; Schmid, Jens H.[et al.] (International Society for Optics and Photonics, 2013)
Integrated polarization rotators suffer from very high sensitivity to fabrication errors. A polarization rotator scheme that substantially increases fabrication tolerances is proposed. In the proposed scheme, two tunable ... -
Are spanish university students ready for lectures in english?
Halir, Robert; Yelamos-Guerra, Maria Salome (2017-07-05)
Content Language Integrated Learning is attracting increasing attention at the University Level. However, the capabilities and expectations of students regarding subjects in a second language are often not clear. We ... -
Automatic design of high-performance fiber-chip surface grating couplers based on Floquet-Bloch mode analysis
Sanchez-Postigo, Alejandro; Xu, Dan-Xia; Hadij-El-Houati, Abdelfettah; Molina-Fernandez, Iñigo; Ortega-Moñux, Alejandro; Wanguemert-Perez, Juan Gonzalo; Halir, Robert; Cheben, Pavel; Pereira-Martín, Daniel[et al.] (2018-04-30)
We propose a new strategy to automatically design highly efficient fiber-chip surface grating couplers. High performance designs are achieved with a substantially reduced computational cost by combining Floquet-Bloch mode ... -
Breakthrough silicon photonics devices using subwavelength grating metamaterials
(UMA Editorial, 2022)Esta Tesis está dedicada al estudio de las estructuras de rejilla de sublongitud de onda (SWG, por sus siglas en inglés): metamateriales ópticos extremadamente versátiles que se han convertido en una herramienta fundamental ... -
Bricked and evanescently-coupled topologies: expanding the portfolio of subwavelength metamaterial silicon photonic devices
Wanguemert-Perez, Juan Gonzalo; Pérez-Armenta, Carlos; Ginel-Moreno, Pablo; Luque-González, José Manuel; Hadij-El-Houati, Abdelfettah; Sanchez-Postigo, Alejandro; De-Oliva-Rubio, Jose; Ortega-Moñux, Alejandro; Halir, Robert; Schmid, Jens H.; Cheben, Pavel; Molina-Fernandez, Iñigo[et al.] (SPIE, 2023-02)
We present two novel topologies of subwavelength grating (SWG) waveguides: the bricked-SWG and the evanescently-coupled-SWG. The bricked topology enables accurate control of waveguide anisotropy while maintaining the index ... -
Bricked subwavelength structures: a flexible metamaterial topology
Luque-González, José Manuel; Ortega-Moñux, Alejandro; Halir, Robert; Molina-Fernandez, Iñigo; Wanguemert-Perez, Juan Gonzalo; Cheben, Pavel; Schmid, Jens H.[et al.] (2021)
Subwavelength gratings (SWG) are periodic structures that synthesize lithography tailorable metamaterials with desired permittivity, dispersion, and anisotropy, enabling the design of a myriad of high-performance devices. ... -
Bringing Optical Communications to the General Public: an Innovative Bachelor Thesis
Halir, Robert; Pardo-García, Víctor; Godoy-Rubio, Rafael (2015-11-18)
The United Nations “International year of light 2015” strives to highlight the importance of optical technologies in our everyday lives. Fibre optic communication is one such technology: the growth of internet and its ... -
Building high-performance integrated optical devices using subwavelength grating metamaterials
Sanchez-Postigo, Alejandro; Ginel-Moreno, Pablo; Ortega-Moñux, Alejandro; Wanguemert-Perez, Juan Gonzalo; Halir, Robert; Pereira-Martín, Daniel; Hadij-El-Houati, Abdelfettah; Schmid, Jens H.; Wang, Shurui; Vachon, Martin; Xu, Dan-Xia; Ye, Winnie N.; Soler-Penades, Jordi; Nedeljkovic, Milos; Mashanovich, Goran Z.; Cheben, Pavel; Molina-Fernandez, Iñigo[et al.] (2021-09)
The use of subwavelength grating structures in silicon waveguides have fuelled the development of integrated optical components with superior performance. By a judicious lithographic pattern of the grating, the optical ... -
Colorless devices and reception techniques for polarization multiplexed communications
Halir, Robert; Reyes-Iglesias, Pedro Jose; Alonso-Ramos, C.; Sarmiento-Merenguel, Darío; Wanguemert-Perez, Juan Gonzalo; Cheben, Pavel; Molina-Fernandez, Iñigo; Ortega-Moñux, Alejandro; Halir, Robert[et al.] (2015-06-29)
Future optical networks call for flexible, high performance and low cost coherent optical receivers. We present here several advances towards such receivers, including integrated optical couplers with ultra-broad bandwidth, as ... -
Comparing the fundamental limit of detection for interferometric and resonant biosensors with coherent phase read-out
Leuermann, Jonas; Molina-Fernandez, Iñigo; Ortega-Moñux, Alejandro; Wanguemert-Perez, Juan Gonzalo; Halir, Robert (2019-06-27)
We compare the limit of detection of coherently interrograted photonic biosensors, using both interferometric and resonant architectures. -
Curved waveguide grating demultiplexer (CWG) with a flattened response via bimodal output waveguides
Hadij-El-Houati, Abdelfettah; Halir, Robert; Ortega-Moñux, Alejandro; Wanguemert-Perez, Juan Gonzalo; Schmid, Jens H.; Cheben, Pavel; Molina-Fernandez, Iñigo[et al.] (2022-05-08)
We demonstrate a compact wavelength demultiplexer for the silicon-on-insulator platform based on the curved waveguide grating (CWG) architecture. The proposed device uses bi- modal output waveguides to achieve a low-loss ... -
Design of subwavelength grating metamaterial waveguides for communications and sensing applications
Ortega-Moñux, Alejandro; Luque-González, José Manuel; Pereira Martín, Daniel; Sanchez-Postigo, Alejandro; Hadij-El-Houati, Abdelfettah; Leuermann, Jonas; De-Oliva-Rubio, Jose; Halir, Robert; Wanguemert-Perez, Juan Gonzalo; Molina-Fernandez, Iñigo; Ctyroky, Jiri; Schmid, Jens H.; Cheben, Pavel[et al.] (2019-07-04)
In this work we will cover some of our recent advances in the design of state-of-the-art silicon photonic devices based on all-dielectric subwavelength grating (SWG) metamaterials. Specifically, we will focus on the design ... -
Designing anisotropy with waveguide subwavelength structures
Herrero-Bermello, Alaine; Velasco, Aitor V.; Schmid, Jens H.; Cheben, Pavel; Halir, Robert; Luque-González, José Manuel; Ortega-Moñux, Alejandro; Wanguemert-Perez, Juan Gonzalo; Molina-Fernandez, Iñigo[et al.] (2018-07-12)
Silicon sub-wavelength structures have become a versatile design tool for practical, high-performance integrated optical devices, ranging from highly efficient grating couplers to ultra-broadband beam-splitters. Recently, ... -
Designing polarization management devices by tilting subwavelength grating structures
Luque-González, José Manuel; Herrero-Bermello, Alaine; Ortega-Moñux, Alejandro; Molina-Fernandez, Iñigo; Velasco, Aitor V.; Cheben, Pavel; Schmid, Jens H.; Wang, Shurui; Halir, Robert[et al.] (2019-05-03)
Subwavelength gratings (SWG) are periodic structures which behave as controllable homogeneous metamaterials. SWGs are extremely interesting when they are used in platforms with a limited choice of material refractive indices, ... -
Diffractive sidewall grating coupler: towards 2D free-space optics on chip.
Hadij-El-Houati, Abdelfettah; Cheben, Pavel; Ortega-Moñux, Alejandro; Wanguemert-Perez, Juan Gonzalo; Halir, Robert; Schmid, Jens H.; Molina-Fernandez, Iñigo[et al.] (2019-05-02)
Silicon photonics has been the subject of intense research efforts. In order to implement complex integrated silicon photonic devices and systems, a wide range of robust building blocks is needed. Waveguide couplers are ... -
Diseño de antena óptica integrada de haz estrecho en tecnología silicon-on-insulator
Ortega-Moñux, Alejandro; Pereira-Martín, Daniel; Hadij-El-Houati, Abdelfettah; Ye, Winnie N.; Melati, Daniele; Xiu, Dan-Xia; Janz, Siegfried; Sanchez-Postigo, Alejandro; Wanguemert-Perez, Juan Gonzalo; Halir, Robert; Molina-Fernandez, Iñigo; Schmid, Jens H.; Cheben, Pavel; Ginel-Moreno, Pablo[et al.] (2021-07)
Las antenas ópticas acopladas en fase son un elemento clave en sistemas de Light Detection and Ranging (LIDAR) integrados, en los que se necesita emitir un haz óptico con ancho angular estrecho en un amplio número de ... -
Diseño de grating couplers de orden cero de banda ancha y alta eficiencia para el infrarrojo medio
Sanchez-Postigo, Alejandro; Wanguemert-Perez, Juan Gonzalo; Luque-González, José Manuel; Molina-Fernandez, Iñigo; 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-Fernandez, Iñigo; Wanguemert-Perez, 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-Perez, Juan Gonzalo; Sanchez-Postigo, Alejandro; Hadij-El-Houati, Abdelfettah; Leuermann, Jonas; Pérez-Armenta, Carlos; Luque-González, José Manuel; Ortega-Moñux, Alejandro; Halir, Robert; Molina-Fernandez, Iñigo; 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 ...