Dr. Alejandro Sánchez-Postigo Profile

Dr. Alejandro Sánchez-Postigo

at Univ Münster

SPIE Involvement:

Author

Publications (21)

Proceedings Article | 13 March 2024 Presentation

Presentation

Silicon photonic Bragg grating structures for spectral filtering

Alejandro Ortega-Moñux, Alejandro Fernández-Hinestrosa, Carlos Pérez-Armenta, José Manuel Luque-González, Alejandro Sánchez-Postigo, Daniel Pereira-Martín, J. Gonzalo Wangüemert-Pérez, Robert Halir, Abdelfettah Hadij-El Houati, Pavel Cheben, Jens Schmid, Maziyar Milanizadeh, Shurui Wang, Kevan MacKay, Winnie Ye, Íñigo Molina-Fernández

Proceedings Volume PC12889, PC128890V (2024) https://doi.org/10.1117/12.3002513

KEYWORDS: Optical filters, Tunable filters, Bragg gratings, Silicon photonics, Telecommunications, Silicon, Quantum optics applications, Quantum optics, Optical gratings, Modulation

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Proceedings Article | 13 March 2024 Presentation

Presentation

Recent advances in integrated photonics with subwavelength and resonant metamaterials

Jens Schmid, Pavel Cheben, Jianhao Zhang, Maziyar Milanizadeh, Saad Bin-Alam, Dan-Xia Xu, Ross Cheriton, Martin Vachon, Shurui Wang, Rubin Ma, William Fraser, Shahrzad Khajavi, Winnie Ye, Pablo Ginel Moreno, Jose-Manuel Luque-González, Alejandro Fernández Hinestrosa, Alejandro Sanchez-Postigo, Robert Halir, Gonzalo Wanguemert-Perez, Alejandro Ortega-Monux, Inigo Molina-Fernández, Zindine Mokkedem, Daniele Melati, Carlos Alonso-Ramos, Laurent Vivien, Radovan Korcek, Daniel Benedikovic, Cameron Naraine, Jonathan Bradley, Yunus Sirmaci, Isabelle Staude

Proceedings Volume PC12889, PC128890M (2024) https://doi.org/10.1117/12.3000757

KEYWORDS: Quantum metamaterials, Photonic metamaterials, Integrated photonics, Quantum optics applications, Optical metamaterials, Industrial applications, Waveguides, Tunable filters, Silicon photonics, Quantum technology applications

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Proceedings Article | 9 March 2024 Presentation

Presentation

Engineering subwavelength-grating photonic integrated structures for quantum applications

Alejandro Sánchez-Postigo, Pablo Ginel-Moreno, Connor Graham-Scott, Jens Schmid, J. Gonzalo Wangüemert-Pérez, Alejandro Ortega-Moñux, Pavel Cheben, Íñigo Molina-Fernández, Carsten Schuck

Proceedings Volume PC12890, PC128900A (2024) https://doi.org/10.1117/12.3002731

KEYWORDS: Nanowires, Quantum applications, Engineering, Waveguides, Single photon detectors, Silicon, Quantum metamaterials, Quantum devices, Photonic metamaterials, Design and modelling

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Proceedings Article | 31 May 2023 Presentation

Presentation

Recent progress in subwavelength grating metamaterial engineered silicon photonic devices

Juan Gonzalo Wangüemert-Pérez, Carlos Pérez-Armenta, Pablo Ginel-Moreno, José Manuel Luque-González, Abdelfettah Hadij-El Houati, Alejandro Sánchez-Postigo, José de Oliva Rubio, Alejandro Ortega-Moñux, Robert Halir, Jens Schmid, Pavel Cheben, Íñigo Molina-Fernández

Proceedings Volume PC12575, PC125750A (2023) https://doi.org/10.1117/12.2666094

KEYWORDS: Metamaterials, Silicon photonics, Waveguides, Polarization, Lithography, Collimation, Silicon, Refractive index, Phased arrays, Optical filters

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Proceedings Article | 17 March 2023 Presentation

Presentation

Bricked and evanescently-coupled topologies: expanding the portfolio of subwavelength metamaterial silicon photonic devices

Juan Gonzalo Wangüemert-Pérez, Carlos Pérez-Armenta, Pablo Ginel-Moreno, José Manuel Luque-González, Abdelfettah Hadij-El Houati, Alejandro Sánchez Postigo, Jose de Oliva Rubio, Alejandro Ortega-Moñux, Robert Halir, Jens Schmid, Pavel Cheben, Íñigo Molina-Fernández

Proceedings Volume PC12424, PC1242405 (2023) https://doi.org/10.1117/12.2651817

KEYWORDS: Metamaterials, Waveguides, Silicon photonics, Silicon, Polarization, Photonic integrated circuits, Waveguide sensors, Wave propagation, Structural design, Silica

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Proceedings Article | 17 March 2023 Presentation

Presentation

Controlling light with advanced subwavelength grating metamaterial topologies

José Manuel Luque-González, Robert Halir, Alejandro Sánchez-Postigo, J. Gonzalo Wangüemert-Pérez, Pavel Cheben, Jens H. Schmid, Aitor V. Velasco, Íñigo Molina-Fernández, Alejandro Ortega-Moñux

Proceedings Volume PC12425, PC124250A (2023) https://doi.org/10.1117/12.2651447

KEYWORDS: Metamaterials, Silicon photonics, Polarization, Anisotropy, Waveguides, Refractive index, Photonic devices, Optical testing, Optical properties, Optical metamaterials

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Proceedings Article | 17 March 2023 Presentation

Presentation

Integrated silicon photonic optical phased arrays with large beam steering and high resolution

Winnie Ye, Daniel Benedikovic, Qiankun Liu, Shahrzad Khajavi, Daniele Melati, Pavel Cheben, Tom Smy, Ahmad Atieh, Alejandro Sánchez Postigo, Jens Schmid, Dan-Xia Xu, Xiaochen Xin

Proceedings Volume PC12425, PC124250G (2023) https://doi.org/10.1117/12.2650465

KEYWORDS: Beam steering, Phased array optics, Silicon photonics, LIDAR, Silicon, Optical components, Chemical elements, Unmanned vehicles, Solid state physics, Satellite communications

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Proceedings Article | 5 March 2022 Presentation + Paper

Presentation + Paper

Subwavelength-engineered metamaterial devices for integrated photonics

A. Sánchez Postigo, P. Ginel-Moreno, D. Pereira-Martin, A. Hadij-El Houati, J. M. Luque-González, C. Pérez-Armenta, J. G. Wangüemert-Pérez, A. Ortega-Moñux, R. Halir, J. H. Schmid, J. Soler Penadés, M. Nedeljkovic, W. Ye, G. Mashanovich, P. Cheben, I. Molina-Fernández

Proceedings Volume 12005, 120050A (2022) https://doi.org/10.1117/12.2607147

KEYWORDS: Waveguides, Silicon, Metamaterials, Optical antennas, Optical filters, Wave propagation, Polarization, Demultiplexers, Mid-IR, Bragg gratings, Optical filter design

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Proceedings Article | 18 April 2021 Presentation

Presentation

Subwavelength metamaterials: the path towards next-generation silicon photonic devices.

Robert Halir, Jose Manuel Luque-González, Alejandro Sánchez-Postigo, Carlos Pérez-Armenta, Pablo Ginel-Moreno, Abdelfettah Hadij-ElHouati, Daniel Pereira-Martin, Antonia Torres-Cubillo, Jonas Leuermann, Jose de-Oliva-Rubio, Juan Gonzalo Wangüemert-Pérez, Alejandro Ortega-Moñux, Íñigo Molina-Fernández, Jens Schmid, Pavel Cheben, Jiri Ctyroky, Aitor Villafranca Velasco, Alaine Herrero-Bermello, David González-Andrade, Antonio Dias-Ponte, Milos Nedeljkovic, Goran Mashanovich

Proceedings Volume 11775, 1177509 (2021) https://doi.org/10.1117/12.2589054

KEYWORDS: Silicon photonics, Metamaterials, Waveguides, Telecommunications, Structured optical fibers, Refractive index, Polarization, Optical properties, Optical communications, Fiber couplers

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Proceedings Article | 5 March 2021 Presentation

Presentation

Subwavelength grating silicon photonic devices

Iñigo Molina-Fernández, Abdelfettah Hadij-Elhouati, José Manuel Luque-González, Daniel Pereira, Alejandro Sánchez Postigo, Gonzalo Wangüenmert-Perez, Alejandro Ortega-Moñux, Robert Halir, Jose de Oliva Rubio, Jens Schmid, Pavel Cheben, Jiri Čtyroký

Proceedings Volume 11691, 1169109 (2021) https://doi.org/10.1117/12.2577455

KEYWORDS: Waveguides, Metamaterials, Silicon photonics, Optical filters, Silicon, Telecommunications, System integration, Structural design, Silica

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Proceedings Article | 5 March 2021 Presentation + Paper

Presentation + Paper

Subwavelength-grating metamaterial integrated devices for the near- and mid-infrared wavelengths

Alejandro Sánchez-Postigo, J. Gonzalo Wangüemert-Pérez, Alejandro Ortega-Moñux, Robert Halir, Daniel Pereira-Martín, José Manuel Luque-González, Jens Schmid, Shurui Wang, Martin Vachon, Dan-Xia Xu, Jordi Soler Penadés, Milos Nedeljkovic, Goran Mashanovich, Pavel Cheben, Íñigo Molina-Fernández

Proceedings Volume 11689, 1168913 (2021) https://doi.org/10.1117/12.2577577

KEYWORDS: Metamaterials, Mid-IR, Silicon photonics, Waveguides, Silicon, Nanophotonics, Integrated photonics, Germanium, Transparency

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Proceedings Article | 4 October 2020 Presentation

Presentation

Suspended silicon waveguide devices for mid-infrared sensing

Milos Nedeljkovic, Yangbo Wu, Alejandro Sanchez Postigo, Jordi Soler Penadés, Zhibo Qu, Alejandro Alejandro Ortega Moñux, Gonzalo Wangüemert Pérez, Robert Halir, Ali Khokhar, Ahmed Osman, Callum Littlejohns, Pavel Cheben, Iñigo Molina Fernández, Otto Muskens, Goran Mashanovich

Proceedings Volume 11577, 1157708 (2020) https://doi.org/10.1117/12.2584905

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Proceedings Article | 2 April 2020 Presentation + Paper

Presentation + Paper

Design of multi-parameter photonic devices using machine learning pattern recognition

Daniele Melati, Yuri Grinberg, Mohsen Kamandar Dezfouli, Jens Schmid, Pavel Cheben, Siegfried Janz, Ross Cheriton, Alejandro Sánchez-Postigo, James Pond, Jens Niegemann, Adam Reid, Dan-Xia Xu

Proceedings Volume 11364, 1136408 (2020) https://doi.org/10.1117/12.2559583

KEYWORDS: Silicon photonics, Photonic devices, Pattern recognition, Machine learning, Optimization (mathematics), Principal component analysis, Waveguides, Integrated photonics, Finite-difference time-domain method

Read Abstract +

Enabled by technological improvements, photonic devices and circuits are becoming increasingly more complex. Non-trivial geometries are designed to reduce device footprint, improve performance, and introduce novel functionalities. However, the number of design variables required to properly represent these geometries quickly grows, limiting the effectiveness of classical design approaches. Moreover, parameters are often strongly interdependent, restricting the use of sequential optimizations or independent parameter sweeps. Although several optimization techniques can be effective for multi-parameter design, they commonly allow to optimize for a single or a handful designs and the optimization process needs to be repeated if new performance criteria are introduced. In contrast to classical design approaches, the in uences of the design parameters remain hidden as well as the general behavior of the design space. In this paper we present an extension of our recent work on the application of machine learning pattern recognition to the design of multi-parameter photonic devices. In particular, we propose using a combination of local optimization based on the adjoint method and the use of dimensionality reduction. Adjoint optimization is used multiple times to generate a small set of different designs with high performance. Dimensionality reduction is applied to analyze the relationship between these degenerate designs and identify a lower-dimensional design sub-space that includes all alternative good designs. This sub-space can be mapped for any performance criteria thus enabling informed decisions based on the relative priorities of all relevant performance specifications. As a proof of concept, we demonstrate a ten-parameter design of an integrated photonic power splitter using silicon-on-insulator technology. We identify a region of possible high performance design solutions and select two design candidates either maximizing the splitter efficiency or minimizing back-reflection.

Proceedings Article | 26 February 2020 Open Access

Open Access

Paper

Subwavelength grating metamaterial structures for integrated photonics

I. Molina-Fernández, J. G. Wangüemert-Perez, A. Ortega-Moñux, Robert Halir, J. de Oliva Rubio, A. Sánchez-Postigo, J. M. Luque-González, Abdelfettah Hadij-Elhouati, D. Pereira-Martín, D. González-Andrade, A. V. Velasco, A. Herrero-Bermello, Jens Schmid, Pavel Cheben, J. Čtyroký

Proceedings Volume 11284, 112840K (2020) https://doi.org/10.1117/12.2545061

KEYWORDS: Polarization, Metamaterials, GRIN lenses, Refractive index, Waveguides, Silicon, Anisotropy, Integrated photonics, Light wave propagation, Lens design

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Proceedings Article | 26 February 2020 Paper

Paper

Silicon subwavelength waveguiding devices

I. Molina-Fernández, J. G. Wangüemert-Pérez, A. Ortega-Moñux, Robert Halir, J. de Oliva Rubio, A. Sánchez-Postigo, J. M. Luque-González, Abdelfettah Hadij-Elhouati, D. Pereira-Martín, D. González-Andrade, A. V. Velasco, A. Herrero-Bermello, Jens Schmid, Pavel Cheben, J. Čtyroký

Proceedings Volume 11290, 112901L (2020) https://doi.org/10.1117/12.2545455

KEYWORDS: Waveguides, Silicon, Diffraction gratings, Optical filters, Optical design, Phase shifts, Light wave propagation, Radio propagation, Diffraction, Bragg gratings

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Proceedings Article | 4 March 2019 Presentation

Presentation

Engineering sub-wavelength silicon waveguides for sensing applications in the near-infrared and mid-infrared band (Conference Presentation)

Juan Gonzalo Wangüemert-Pérez, Alejandro Sánchez-Postigo, Abdelfettah Hadij-ElHouati, Jonas Leuermann, Carlos Pérez-Armenta, Faysal El Mokhtari Mimun, Daniel Pereira-Martín, José Manuel Luque-González, Alejandro Ortega-Moñux, Robert Halir, Iñigo Molina-Fernández, Pavel Cheben, Jens Schmid, Dan-Xia Xu, Jirí Čtyroký, Jordi Soler-Penades, Milos Nedeljkovic, Goran Mashanovich

Proceedings Volume 10923, 1092307 (2019) https://doi.org/10.1117/12.2508749

KEYWORDS: Waveguides, Silicon, Mid-IR, Light-matter interactions, Silicon photonics, Lab on a chip, Diffraction gratings, Silica, Metamaterials, Cladding

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Proceedings Article | 4 March 2019 Paper

Paper

Reaping the benefits of machine learning pattern recognition in nanophotonic component design

Yuri Grinberg, Daniele Melati, Mohsen Kamandar Dezfouli, Siegfried Janz, Jens Schmid, Pavel Cheben, Alejandro Sánchez-Postigo, J. Gonzalo Wangüemert-Pérez, Iñigo Molina-Fernández, Alejandro Ortega-Moñux, Dan-Xia Xu

Proceedings Volume 10921, 109210B (2019) https://doi.org/10.1117/12.2506787

KEYWORDS: Machine learning, Optical design, Silicon, Nanophotonics, Pattern recognition, Principal component analysis, Metamaterials, Device simulation, Optimization (mathematics)

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Proceedings Article | 16 June 2017 Presentation

Presentation

Design of optical metamaterial waveguide structures (Conference Presentation)

Alejandro Ortega-Moñux, Robert Halir, Alejandro Sánchez-Postigo, Jordi Soler-Penadés, Jirí Ctyroký, José Manuel Luque-González, José Darío Sarmiento-Merenguel, Juan Gonzalo Wangüemert-Pérez, Jens Schmid, Dan-Xia Xu, Sigfried Janz, Jean Lapointe, Iñigo Molina-Fernández, Milos Nedeljkovic, Goran Mashanovich, Pavel Cheben

Proceedings Volume 10242, 102420D (2017) https://doi.org/10.1117/12.2268861

KEYWORDS: Wave propagation, Radio propagation, Waveguides, Integrated optics, Mid-IR, Brain-machine interfaces, Diffraction gratings, Beam splitters, Optical design, Optical metamaterials

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Proceedings Article | 17 May 2017 Presentation + Paper

Presentation + Paper

Broadband high-efficiency zero-order surface grating coupler for the near- and mid-infrared wavelength ranges

Alejandro Sánchez-Postigo, J. Gonzalo Wangüemert-Pérez, José Manuel Luque-González, Íñigo Molina-Fernández, Pavel Cheben, Carlos Alonso-Ramos, Robert Halir, Jens Schmid, Alejandro Ortega-Moñux

Proceedings Volume 10242, 102420E (2017) https://doi.org/10.1117/12.2265732

KEYWORDS: Waveguides, Mid-IR, Diffraction gratings, Cladding, Integrated optics, Optical fibers, Optical design, Silicon photonics, Single mode fibers, Dispersion, Silicon, Prisms, Germanium

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Proceedings Article | 20 February 2017 Paper

Paper

Subwavelength metamaterial engineering for silicon photonics

Robert Halir, Alejandro Ortega-Moñux, Jordi Soler-Penades, José Luque-González, Dario Sarmiento-Merenguel, Alejandro Sánchez-Postigo, Gonzalo Wangüemert-Pérez, Jens Schmid, Dan-Xia Xu, Siegfried Janz, Jean Lapointe, Íñigo Molina-Fernández, Milos Nedeljkovic, Goran Mashanovich, Pavel Cheben

Proceedings Volume 10107, 1010703 (2017) https://doi.org/10.1117/12.2253727

KEYWORDS: Anisotropy, Waveguides, Silicon photonics, Metamaterials, Structural engineering, Mid-IR, Dispersion, Beam splitters, Oxides, Photonic integrated circuits, Diffraction, Silicon, Refractive index, Brain-machine interfaces, Scanning electron microscopy

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Proceedings Article | 1 May 2015 Paper

Paper

A subwavelength structured multimode interference coupler for the 3-4 micrometers mid-infrared band

Alejandro Sánchez-Postigo, Juan Gonzalo Wangüemert-Pérez, Robert Halir, Alejandro Ortega-Moñux, Carlos Alonso-Ramos, Íñigo Molina-Fernández, Jordi Soler Penadés, Milos Nedeljkovic, Goran Mashanovich, Pavel Cheben

Proceedings Volume 9516, 95160L (2015) https://doi.org/10.1117/12.2179454

KEYWORDS: Brain-machine interfaces, Waveguides, Silicon, Mid-IR, Multimode interference devices, Refractive index, Wave propagation, Molecules, Gases, Silica

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Showing 5 of 21 publications

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