ListarIC - Artículos por tema "Fotónica"
Mostrando ítems 1-12 de 12
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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 ... -
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 ... -
Analytical Framework to Model Reconfigurable Metasurfaces including Lumped Elements.
Pérez-Escribano, Mario; Moreno-Rodríguez, Salvador; Molero, Carlos; Valenzuela-Valdés, Juan Francisco; Padilla, Pablo; Alex-Amor, Antonio; Pérez-Escribano, Mario[et al.] (IEEE Transactions on Circuits and Systems II: Express Briefs, 2023-11-06)
This manuscript introduces an analytical framework for the design of reconfigurable metasurfaces rooted in 2D periodic structures. Incorporating lumped elements into the model streamlines the design process for such devices, ... -
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 ... -
Circular Optical Phased Array with Large Steering Range and High Resolution
(IOAP-MPDI, 2022-08-16)Light detection and ranging systems based on optical phased arrays and integrated silicon photonics have sparked a surge of applications over the recent years. This includes applications in sensing, free-space communications, ... -
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 Microwave Photonics Coherent Processor for Massive-MIMO Systems in Wireless Communications
Martínez-Carrasco Romero, Pablo; Rausell-Campo, José Roberto; Pérez-Galacho, Diego; Li, Xu; Qing, Ting; Wang, Tiangxiang; Pérez-López, Daniel[et al.] (2023-04-05)
Massive-MIMO systems can achieve high capacities and data rates by increasing the number of operational antennas in the base station. As more antenna elements are introduced, the complexity of the signal processing operations ... -
Linearization of a Dual-Parallel Mach-Zehnder Modulator Using Optical Carrier Band Processing
Torrijos-Morán, Luis; Catalá-Lahoz, Cristina; Pérez-López, Daniel; Xu, Li; Tianxiang, Wang; Pérez-Galacho, Diego[et al.] (IEEE, 2023-05-15)
The linearization of a microwave photonic link based on a dual-parallel Mach-Zehnder modulator is theoretically de- scribed and experimentally demonstrated. Up to four different radio frequency tones are considered in the ... -
Perfectly vertical surface grating couplers using subwavelength engineering for increased feature sizes.
Kamandar Dezfouli, Mohsen; Grinberg, Yuri; Melati, Daniele; Cheben, Pavel; Schmid, Jens H.; Sánchez-Postigo, Alejandro; Ortega-Moñux, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Cheriton, Ross; Janz, Siegfried; Xu, Dan-Xia; Schmid, Jens H.[et al.] (Optica, 2020-06-29)
We present perfectly vertical grating couplers for the 220 nm silicon-on-insulator platform incorporating subwavelength metamaterials to increase the minimum feature sizes and achieve broadband low back-reflection. Our ... -
Polarization splitting directional coupler using tilted subwavelength gratings
Luque-González, José Manuel; Herrero-Bermello, Alaine; Ortega-Moñux, Alejandro; Sánchez-Rodriguez, Marina; Velasco, Aitor V.; Schmid, Jens; Cheben, Pavel; Molina-Fernández, Íñigo; Halir, Robert[et al.] (Optica Publishing Group, 2020)
On-chip polarization splitters are key elements for coherent optical communication systems and polarization diversity circuits. These devices are often implemented with directional couplers that are symmetric for one ... -
QPSK modulation in the O-band using a single dual-drive Mach-Zehnder silicon modulator
Pérez-Galacho, Diego; Bramerie, Laurent; Baudot, Charles; Chaibi, Mohamed; Messaoudène, Sonia; Vulliet, Nathalie; Vivien, Laurent; Peucheret, Christophe; Marris-Morini, Delphine[et al.] (IEEE, 2018-09-15)
Keeping up with bandwidth requirements in next generation short- and long-reach optical communication systems will require migrating from simple modulation formats such as on-off keying (OOK) to more advanced formats such ... -
Suspended silicon waveguides for long-wave infrared wavelengths
Soler Penadés, Jordi; Sánchez-Postigo, Alejandro; Nedeljkovic, Milos; Ortega-Moñux, Alejandro; Wangüemert-Pérez, J. Gonzalo; Xu, Yolanda; Halir, Robert; Qu, Zhibo; Khokhar, Ali Z.; Osman, Ahmed; Cao, Wei; Littlejohns, Callum G.; Cheben, Pavel; Molina-Fernández, Íñigo; Mashanovich, Goran Z.[et al.] (Optica Publishing Group, 2018-02-09)
In this Letter, we report suspended silicon waveguides operating at a wavelength of 7.67 μm with a propagation loss of 3.1±0.3 dB/cm. To our knowledge, this is the first demonstration of low-loss silicon waveguides at such ...