Listar por autor "Sánchez-Postigo, Alejandro"
Mostrando ítems 21-40 de 46
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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 ... -
Mapping the global design space of nanophotonic components using machine learning pattern recognition
(Springer Nature, 2019-10-21)Nanophotonics finds ever broadening applications requiring complex components with many parameters to be simultaneously designed. Recent methodologies employing optimization algorithms commonly focus on a single performance ... -
Metamaterial antenna array fed by distributed Bragg deflector for beam steering on SOI platform
Ginel-Moreno, Pablo; Hadij-El-Houati, Abdelfettah; Sánchez-Postigo, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Molina-Fernández, Íñigo; Schmid, Jens H.; Cheben, Pavel; Ortega-Moñux, Alejandro[et al.] (2023)
The capability to radiate collimated steerable beams of light is crucial for many applications, such as remote sensing and free-space optical communications. Here we experimentally demonstrate a novel 1D-antenna array ... -
Metamaterial antenna array fed by distributed Bragg deflector for SOI platform
Ginel-Moreno, Pablo; Hadij-El-Houati, Abdelfettah; Sánchez-Postigo, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Molina-Fernández, Íñigo; Schmid, Jens H.; Cheben, Pavel; Ortega-Moñux, Alejandro[et al.] (2022)
We propose a distributed Bragg deflector working as a low loss (<0.3 dB) ultra compact beam expander, which generates an on chip Gaussian beam that illuminates a 1D array of 112 optical antennas with a length of 1.5 mm . ... -
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 ... -
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 ... -
Millimeter-long metamaterial surface-emitting antenna in the silicon photonics platform
Ginel-Moreno, Pablo; Sánchez-Postigo, Alejandro; De-Oliva-Rubio, José; Hadij-ElHouati, Abdelfettah; Ye, Winnie N.; Wanguemert-Pérez, Juan Gonzalo; Molina-Fernández, Íñigo; Schmid, Jens H.; Cheben, Pavel; Ortega-Moñux, Alejandro[et al.] (Optical Publishing Group, 2021-07-28)
Integrated optical antennas are key components for on-chip light detection and ranging technology (LIDAR). In order to achieve a highly collimated far field with reduced beam divergence, antenna lengths on the order of ... -
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, ... -
On-Chip Metamaterial Antenna Array with Distributed Bragg Deflector for Generation of Collimated Steerable Beams
Ginel-Moreno, Pablo; Hadij-El-Houati, Abdelfettah; Sánchez-Postigo, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Molina-Fernández, Íñigo; Schmid, Jens H.; Cheben, Pavel; Ortega-Moñux, Alejandro[et al.] (WILEY, 2022-07-03)
The generation of collimated steerable beams of light is a fundamental function in optics needed in many applications, including free-space optical communications, remote sensing, and light detection and ranging. Implementing ... -
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 ... -
Recent progress in subwavelength grating metamaterial engineered 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.] (2023)
In this talk we present our recent advances in SWG metamaterial engineering. We will show a 1D-optical phased array composed of 112 evanescent-coupled surface emitting antennas with a length of 1.5 mm and fed by a compact ... -
Silicon high performance devices using subwavelength structures
Halir, Robert; Sánchez-Postigo, Alejandro; Luque-González, José Manuel; Herrero-Bermello, Alaine; Leuermann, Jonas; Ortega-Moñux, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Velasco, Aitor V.; De-Oliva-Rubio, José; Schmid, Jens H.; Cheben, Pavel; Soler-Penades, Jordi; Nedeljkovic, Milos; Mashanovich, Goran Z.; Molina-Fernández, Íñigo[et al.] (2019-03-13)
Silicon photonics is poised to solve challenges in areas such as datacom, environmental monitoring and diagnostics, by leveraging the economies of scale afforded by CMOS manufacturing. This requires a wide variety of ... -
Silicon Photonic Bragg Grating Structures for Spectral Filtering.
Ortega-Moñux, Alejandro; Fernández-Hinestrosa, Alejandro; Pérez Armenta, Carlos; Luque González, José Manuel; Sánchez-Postigo, Alejandro; Pereira-Martín, Daniel; Wanguemert-Pérez, Juan Gonzalo; Halir, Robert; Hadij-El-Houati, Abdelfettah; Cheben, Pavel; Schmid, Jens H.; Milanizadeh, M.; Wang, Shurui; Mackay, Kevan K.; Ye, Winnie N.; Molina-Fernández, Íñigo[et al.] (2024)
Integrated optical filters play a key role in modern optical systems, finding extensive applications in quantum optics, biosensing, programmable photonics, and telecommunications. Among the most commonly used structures ... -
Subwavelength Index Engineering for SOI Waveguides
Halir, Robert; Luque-González, José Manuel; Wang, S.; Sarmiento-Merenguel, Jose Darío; Sánchez-Postigo, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Cheben, Pavel; Schmid, Jens H.; Xu, Dan-Xia; Janz, Siegfried; Lapointe, J.; Molina-Fernández, Íñigo; Ortega-Moñux, Alejandro[et al.] (2016-09-06)
Photonic structures with a sub-wavelength pitch, small enough to suppress diffraction, can behave as equivalent homogenous materials that can be engineered to exhibit a specific refractive index and dispersion. Here we ... -
Subwavelength metamaterial engineering for silicon photonics
Halir, Robert; Ortega-Moñux, Alejandro; Soler-Penades, Jordi; Luque-González, José Manuel; Sarmiento-Merenguel, Jose Darío; Sánchez-Postigo, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Schmid, Jens H.; Xu, Dan-Xia; Janz, Siegfried; Lapointe, J.; Molina-Fernández, Íñigo; Nedeljkovic, Milos; Mashanovich, Goran Z.; Cheben, Pavel[et al.] (2017-02-06)
Waveguides structured at the subwavelength scale frustrate di raction and behave as optical metamaterials with controllable refractive index. These structures have found widespread applications in silicon photonics, ranging ... -
Subwavelength metamaterial for communications and sensing
Wanguemert-Pérez, Juan Gonzalo; Sánchez-Postigo, Alejandro; Hadij-El-Houati, Abdelfettah; Pereira-Martín, Daniel; Luque-González, José Manuel; Leuermann, Jonas; Ortega-Moñux, Alejandro; Halir, Robert; Molina-Fernández, Íñigo; Cheben, Pavel; Xu, Dan-Xia; Schmid, Jens H.; Ctyroky, Jiri; Litvik, Jan; Soler-Penades, Jordi; Nedeljkovic, Milos; Mashanovich, Goran Z.; González Andrade, David; Velasco, Aitor V.[et al.] (2018-10-29)
Silicon photonics is considered a breakthrough technology with strong impact in areas as diverse as data center interconnection, high performance computing, the deployment of 5G future communication systems or lab-on-a-chip ... -
Subwavelength metamaterial structures for silicon photonics
Wanguemert-Pérez, Juan Gonzalo; Sánchez-Postigo, Alejandro; Luque-González, José Manuel; Sarmiento-Merenguel, Jose Darío; Halir, Robert; Ortega-Moñux, Alejandro; Molina-Fernández, Íñigo; Soler-Penades, Jordi; Nedeljkovic, Milos; Mashanovich, Goran Z.; Alonso-Ramos, C.; Pérez-Galacho, Diego; González Andrade, David; V. Velasco, Aitor[et al.] (Photonics North, 2017)
Sub-wavelength periodic metamaterial structures are enabling the design of silicon photonic devices with unprecedented performance in the near infrared band. However, for applications in the promising mid-infrared band it ... -
Subwavelength-engineered metamaterial devices for integrated photonics
Sánchez-Postigo, Alejandro; Ginel-Moreno, Pablo; Pereira-Martín, Daniel; Hadij-El-Houati, Abdelfettah; Luque-González, José Manuel; Pérez-Armenta, Carlos; Wanguemert-Pérez, Juan Gonzalo; Ortega-Moñux, Alejandro; Halir, Robert; Schmid, Jens H.; Soler-Penades, Jordi; Nedeljkovic, Milos; Ye, Winnie N.; Mashanovich, Goran Z.; Cheben, Pavel; Molina-Fernández, Íñigo[et al.] (2022)
The engineering of subwavelength grating metamaterials has become an essential design strategy in silicon photonics. The lithographic segmentation of integrated waveguides at the subwavelength scale enables the synthesis ... -
Subwavelength-grating metamaterial integrated devices for the near- and mid-infrared wavelengths
Sánchez-Postigo, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Ortega-Moñux, Alejandro; Halir, Robert; Pereira-Martín, Daniel; Luque-González, José Manuel; Schmid, Jens H.; Wang, Shurui; Vachon, Martin; Xu, Dan-Xia; Soler-Penades, Jordi; Nedeljkovic, Milos; Mashanovich, Goran Z.; Cheben, Pavel; Molina-Fernández, Íñigo[et al.] (2021)
The subwavelength patterning of planar structures is now widely used in silicon photonics, enabling the synthesis of metamaterials with engineered optical properties, including refractive index, dispersion, and anisotropy. ... -
Suspended germanium waveguides with subwavelength-grating metamaterial cladding for the mid-infrared band
Sánchez-Postigo, Alejandro; Ortega-Moñux, Alejandro; Soler Penadés, Jordi; Osman, Ahmed; Nedeljkovic, Milos; Qu, Zhibo; Wu, Yangbo; Molina-Fernández, Íñigo; Cheben, Pavel; Mashanovich, Goran Z.; Wanguemert-Pérez, Juan Gonzalo[et al.] (Optica Publishing Group, 2021-05-24)
In recent years, sensing and communication applications have fueled important developments of group-IV photonics in the mid-infrared band. In the long-wave range, most platforms are based on germanium, which is transparent ...