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Listar por autor "Halir, Robert"
Mostrando ítems 1-20 de 78
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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-Fernández, Íñigo; 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-Fernández, Íñigo; 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 ... -
A review of silicon subwavelength gratings: building break-through devices with anisotropic metamaterials
Luque-González, José Manuel; Sánchez-Postigo, Alejandro; Hadij-El-Houati, Abdelfettah; Ortega-Moñux, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Schmid, Jens H.; Cheben, Pavel; Molina-Fernández, Íñigo; Halir, Robert[et al.] (De Gruyter, 2021)Silicon photonics is playing a key role in areas as diverse as high-speed optical communications, neural networks, supercomputing, quantum photonics, and sensing, which demand the development of highly efficient and compact ... -
Advances in photonic metamaterials and sensing architectures
Halir, Robert; Torres-Cubillo, Antonia; Barona-Ruiz, Miguel; Sánchez-Ramírez, Ana; Luque-González, José Manuel; Moreno-Pozas, Laureano; Pérez-Armenta, Carlos; Ginel-Moreno, Pablo; Fernández-Hinestrosa, Alejandro; Leuermann, Jonas; De-Oliva-Rubio, José; Schmid, Jens H.; Ortega-Moñux, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Cheben, Pavel; Molina-Fernández, Íñigo[et al.] (2024)Subwavelength materials have become a fundamental tool for silicon photonic design, enabling devices with unique performance characteristics. We will briefly review some fundamentals here and will then discuss some of the ... -
An ultracompact GRIN lens based spot size converter using subwavelength grating metamaterials
Luque-González, José Manuel; Halir, Robert; Wanguemert-Pérez, Juan Gonzalo; De-Oliva-Rubio, José; Schmid, Jens H.; Cheben, Pavel; Molina-Fernández, Íñigo; Ortega Moñux, Alejandro[et al.] (Wiely, 2019)Graded-index materials offer virtually complete control over light propagation in integrated photonic chips but can be challenging to implement. Here, an anisotropic graded-index metamaterial, synthesized with fully etched ... -
Are spanish university students ready for lectures in english?
Halir, Robert; Yélamos-Guerra, María Salomé (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
Sánchez-Postigo, Alejandro; Xu, Dan-Xia; Hadij-El-Houati, Abdelfettah; Molina-Fernández, Íñigo; Ortega-Moñux, Alejandro; Wanguemert-Pérez, 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 ... -
Biosensor fotónico integrado con capacidad de discriminación por capas.
Sánchez-Ramírez, Ana; Wanguemert-Pérez, Juan Gonzalo; De-Oliva-Rubio, José; Luque-González, José Manuel; Godoy-Rubio, Rafael; Ortega-Moñux, Alejandro; Halir, Robert; Leuermann, Jonas; Molina-Fernández, Íñigo[et al.] (XXXVIII Simposio Nacional de la Unión Científica Internacional de Radio, 2023)Photonic integrated biosensors have emerged as a highly attractive alternative for biomarker detection in applications ranging from clinical diagnosis to food quality monitoring. Detecting specific target and differentiating ... -
Breaking the Coupling Efficiency–Bandwidth Trade-Off in Surface Grating Couplers Using Zero-Order Radiation
Sánchez-Postigo, Alejandro; Halir, Robert; Wanguemert-Pérez, Juan Gonzalo; Ortega-Moñux, Alejandro; Wang, Shurui; Vachon, Martin; Schmid, Jens H.; Xu, Dan-Xia; Cheben, Pavel; Molina-Fernández, Íñigo[et al.] (Wiley, 2021-05-05)Silicon photonics provides wafer-scale fabrication of densely integrated photonic circuits that are enabling breakthrough applications in datacom, artificial intelligence, and healthcare. The sub-micrometer mode size of ... -
Breakthrough silicon photonics devices using subwavelength grating metamaterials
Luque-González, José Manuel (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-Pérez, Juan Gonzalo; Pérez-Armenta, Carlos; Ginel-Moreno, Pablo; Luque-González, José Manuel; Hadij-El-Houati, Abdelfettah; Sánchez-Postigo, Alejandro; De-Oliva-Rubio, José; Ortega-Moñux, Alejandro; Halir, Robert; Schmid, Jens H.; Cheben, Pavel; Molina-Fernández, Íñigo[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 subwavelengh gratings: A tailorable biaxial on-chip metamaterial topology
Luque-González, José Manuel; Ortega-Moñux, Alejandro; Halir, Robert; Schmid, Jens H.; Cheben, Pavel; Molina-Fernández, Íñigo; Wanguemert-Pérez, Juan Gonzalo[et al.] (Wiley, 2021)Integrated metamaterials are redefining the capabilities of silicon photonic chips. In providing lithographic control over dielectric permittivity, dispersion and anisotropy, they are enabling photonic devices with ... -
Bricked subwavelength structures: a flexible metamaterial topology
Luque-González, José Manuel; Ortega-Moñux, Alejandro; Halir, Robert; Molina-Fernández, Íñigo; Wanguemert-Pérez, 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 ... -
Broadband 2 × 2 multimode interference coupler for mid-infrared wavelengths
Stirling, Callum J.; Halir, Robert; Sánchez-Postigo, Alejandro; Qu, Zhibo; Reynolds, Jamie D.; Soler Penadés, Jordi; Murugan, Ganapathy Senthil; Ortega-Moñux, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Molina-Fernández, Íñigo; Mashanovich, Goran Z.; Nedeljkovic, Milos[et al.] (Optical Publishing Group, 2021-10-19)Beam splitters are core components of photonic integrated circuits and are often implemented with multimode interference couplers. While these devices offer high performance, their operational bandwidth is still restrictive ... -
Broadband fiber-chip zero-order surface grating coupler with 0.4 dB efficiency.
Sánchez-Postigo, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Luque-González, José Manuel; Molina-Fernández, Íñigo; Cheben, Pavel; Alonso-Ramos, Carlos A.; Halir, Robert; Schmid, Jens H.; Ortega-Moñux, Alejandro[et al.] (Optica Publishing Group, 2016-06-24)Surface grating couplers enable efficient coupling of light between optical fibers and nanophotonic waveguides. However, in conventional grating couplers, the radiation angle is intrinsically wavelength dependent, thereby ... -
Building high-performance integrated optical devices using subwavelength grating metamaterials
Sánchez-Postigo, Alejandro; Ginel-Moreno, Pablo; Ortega-Moñux, Alejandro; Wanguemert-Pérez, 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-Fernández, Íñigo[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 José; Alonso-Ramos, C.; Sarmiento-Merenguel, Jose Darío; Wanguemert-Pérez, Juan Gonzalo; Cheben, Pavel; Molina-Fernández, Íñigo; 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-Fernández, Íñigo; Ortega-Moñux, Alejandro; Wanguemert-Pérez, 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-Pérez, Juan Gonzalo; Schmid, Jens H.; Cheben, Pavel; Molina-Fernández, Íñigo[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 ...