Listar IC - Artículos por autor "Halir, Robert"
Mostrando ítems 1-15 de 15
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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 ... -
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 ... -
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 ... -
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 ... -
Design of a suspended germanium micro-antenna for efficient fiber-chip coupling in the long-wavelength mid-infrared range
Sánchez-Postigo, Alejandro; Ortega-Moñux, Alejandro; Pereira-Martín, Daniel; Molina-Fernández, Íñigo; Halir, Robert; Cheben, Pavel; Soler Penadés, Jordi; Nedeljkovic, Milos; Mashanovich, Goran Z.; Wanguemert-Pérez, Juan Gonzalo[et al.] (Optica Publishing Group, 2019-08-05)
Recent developments of photonic integrated circuits for the mid-infrared band has opened up a new field of attractive applications for group IV photonics. Grating couplers, formed as diffractive structures on the chip ... -
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 Polarization Beam Splitter for 100/400 GE Polarization Multiplexed Coherent Optical Communications
Pérez-Galacho, Diego; Zhang, Ruiyong; Ortega-Moñux, Alejandro; Halir, Robert; Alonso-Ramos, Carlos A.; Runge, Patrick; Janiak, Klemens; Zhou, Gan; Bach, Heinz-Gunter; Steffan, Andreas G.; Molina-Fernández, Íñigo[et al.] (IEEE, 2013-12-04)
Monolithically integrated polarization management is a key objective for the next generation of high speed optical co- herent receivers, and will enable transmission rates up to 400 Gbps. In this work we present a ... -
Integrated polarization beam splitter with relaxed fabrication tolerances
Pérez-Galacho, Diego; Halir, Robert; Ortega-Moñux, Alejandro; Alonso-Ramos, Carlos A.; Zhang, R.; Runge, Patrick; Janiak, Klemens; Bach, Heinz-Gunter; Steffan, Andreas G.; Molina-Fernández, Íñigo[et al.] (Optical Publishing Group, 2013-06-06)
Polarization handling is a key requirement for the next generation of photonic integrated circuits (PICs). Integrated polarization beam splitters (PBS) are central elements for polarization management, but their use in ... -
Mid-infrared suspended waveguide platform and building blocks
Sánchez-Postigo, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Soler Penadés, Jordi; Ortega-Moñux, Alejandro; Nedeljkovic, Milos; Halir, Robert; El Mokhtari Mimum, Faysal; Xu Cheng, Yolanda; Qu, Zhibo; Khokahr, Ali Z.; Osman, Ahmed; Cao, Wei; Littlejohns, Callum G.; Cheben, Pavel; Mashanovich, Goran Z.; Molina-Fernández, Íñigo[et al.] (Wiley, 2019-04-01)
In this work, the authors present their recent progress in the development of a platform for the mid-infrared wavelength range, based on suspended silicon waveguides with subwavelength metamaterial cladding. The platform ... -
Polarization insensitive metamaterial engineered multimode interference coupler in a 220 nm silicon-on-insulator platform
Pérez-Armenta, Carlos; Ortega-Moñux, Alejandro; Luque-González, José Manuel; Halir, Robert; Schmid, Jens; Cheben, Pavel; Molina-Fernández, Íñigo; Wanguemert-Pérez, Juan Gonzalo[et al.] (Elsevier, 2023)
High-index contrast silicon waveguides exhibit strong birefringence that hinders the development of polarization-insensitive devices, especially for sub-micrometer silicon layer thickness. Here a polarizationindependent 2 ... -
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 ... -
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 ... -
Tilted subwavelength gratings: controlling anisotropy in metamaterial nanophotonic waveguides
Luque-González, José Manuel; Herrero-Bermello, Alaine; Ortega-Moñux, Alejandro; Molina-Fernández, Íñigo; Halir, Robert; Wang, Shurui; Schmid, Jens H.; Cheben, Pavel; Velasco, Aitor V.[et al.] (2018-10-24)
Subwavelength grating (SWG) structures are an essential tool in silicon photonics, enabling the synthesis of metamaterials with a controllable refractive index. Here we propose, for the first time to the best of our ...