• Engineering sub-wavelength silicon waveguides for sensing applications in the near-infrared and mid-infrared band 

      Wanguemert-Perez, Juan Gonzalo; Sánchez-Postigo, Alejandro; Hadij-ElHouati, Abdelfettah; Leuermann, Jonas; Pérez-Armenta, Carlos; [et al.] (2019-02-08)
      Silicon photonics is one of the most promising candidates to achieve lab-on-a-chip systems. Making use of the evanescent-field sensing principle, it is possible to determine the presence and concentration of substances by ...
    • Engineering the optical properties of silicon using sub-wavelength structures 

      Halir, Robert; Ortega-Moñux, Alejandro; Maese-Novo, Alejandro; Pérez-Galacho, Diego; Zavargo-Peche, Luis; [et al.] (IEEE Photonics Society, 2013)
      In most integrated optics platforms, including silicon-on-insulator, only minor modifications in refractive index are possible. The geometry of the waveguiding structure is thus the only degree of freedom for the design ...
    • Enhanced sensitivity subwavelength grating waveguides for silicon photonics sensing applications 

      Wanguemert-Perez, Juan Gonzalo; Hadij-El-Houati, Abdelfettah; Sanchez-Postigo, Alejandro; Leuermann, Jonas; Pereira-Martín, Daniel; [et al.] (2019-07-16)
      In this work we will review the enormous potential of subwavelength grating waveguides for sensing applications in the near and mid-infrared bands, demonstrating the capability to engineer the mode profile to maximize the ...
    • Estructuras sub-longutud de onda para el diseño de dispositivos en guía dieléctrica 

      Ortega-Moñux, Alejandro; Wanguemert-Perez, Juan Gonzalo; Halir, Robert; Cheben, Pavel; Godoy-Rubio, Rafael; [et al.] (Juan Córcoles Ortega et al., 2016)
      Sub-wavelength structures are enabling the design of devices based in dielectric waveguides with unprecedented performance in both the near-infrared and mid-infrared wavelength regions. These devices include fiber-to-chip ...
    • Estudio comparativo de biosensors coherentes basados en estructuras interferométricas y resonantes 

      Molina Fernandez, Iñigo; Leuerman, Jonas; Ortega-Moñux, Alejandro; Wanguemert-Perez, Juan Gonzalo; Halir, Robert (2019-06-18)
      La gran mayoría de los biosensores fotónicos de campo evanescente se basan en arquitecturas interferométricas o resonantes. La determinación analítica del límite de detección (LOD) alcanzable con estas arquitecturas es muy ...
    • High performance and small footprint spot size converters based on SWG metamaterial lenses 

      Luque-González, José Manuel; Molina-Fernandez, Iñigo; Ortega-Moñux, Alejandro; Halir, Robert; Schmid, Jens H.; [et al.] (2018-06-28)
      Spot size converters with high expansion ratio are required in a variety of situations. This is the case of non-focusing Silicon on Insulator (SOI) fiber-to-chip grating couplers, which typically require long adiabatic ...
    • High performance silicon photonic devices based on practical metamaterials 

      Halir, Robert; Luque-González, Jose Manuel; Sánchez-Postigo, Alejandro; Herrero-Bermello, Alaine; González-Andrade, David; [et al.] (2019-07-15)
      Subwavelength grating metamaterials are enabling a new generation of high-performance silicon photonic devices. Here we discuss the fundamental physics along with some of the latest advances in this rapidly expanding field.
    • Metamaterial engineered C+L band 90º hybrid with 150 nm feature size 

      Hadij-El-Houati, Abdelfettah; Halir, Robert; Ortega-Moñux, Alejandro; Wanguemert-Perez, Juan Gonzalo; Podmore, Hugh; [et al.] (2020-09-28)
      90º hybrids are important components for coherent optical communications. Conventional implementations only cover the C band, while broadband, metamaterial-based devices require sub-100nm feature sizes. We propose a ...
    • Mid-infrared Suspended Waveguide Platform and Building Blocks 

      Wanguemert-Perez, Juan Gonzalo; Sánchez-Postigo, Alejandro; Soler-Penades, Jordi; Ortega-Moñux, Alejandro; Nedeljkovic, Milos; [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 ...
    • Molding silicon waveguide devices with sub-wavelength structures 

      Halir, Robert; Ortega-Moñux, Alejandro; Maese-Novo, Alejandro; Pérez-Galacho, Diego; Molina-Fernandez, Iñigo; [et al.] (2013-09-18)
    • Nuevos esquemas de recepción coherente multipuerto para comunicaciones ópticas 

      Reyes-Iglesias, Pedro Jose (Servicio de Publicaciones y Divulgación Científica, 2015)
      Los objetivos de esta Tesis se centran en el estudio y evaluación numérica de nuevos esquemas de recepción coherente multipuerto de sistemas de comunicación por fibra óptica. Se ha desarrollado y validado una herramienta ...
    • Photonic chip interconnects and integrated polarization management for coherent communication 

      Alonso-Ramos, C. (Universidad de Málaga, Servicio de Publicaciones y Divulgación Científica, 2014)
      En este trabajo se han expuesto diversas aportaciones originales, entre las que cabe destacar el desarrollo de redes de difracción eficientes para el acoplo chip-fibra, el diseño de rotadores de polarización integrados de ...
    • Polarization management for coherent optical receivers 

      Robert, Halir; Ortega-Moñux, Alejandro; Diego, Perez-Galacho; Carlos, Alonso-Ramos; Ruiyong, Zhang; [et al.] (2014-06-03)
      The constant growth of bandwidth requirements in optical communication networks has prompted the evolution from conventional on-off-keying (OOK) transmission techniques to coherent, polarization multiplexed schemes. The ...
    • Re-inventing Multimode Interference Couplers Using Subwavelength Gratings 

      Ortega-Moñux, Alejandro; Halir, Robert; Maese Novo, Alejandro; Alonso-Ramos, C.; Zavargo-Peche, Luis; [et al.] (European Physical Society, IEEE, The Optical Society, 2013)
      We use the concept of subwavelength grating (SWG) refractive-index-engineering to propose and experimentally demonstrate a reduced size, slotted 2x2 MMI coupler. We also present an ultra-broadband 2x2 MMI coupler which ...
    • Receptor coherente integrado ‘colorless’ de gran margen dinámico basado en un acoplador a 120º 

      Reyes-Iglesias, Pedro Jose; Ortega-Moñux, Alejandro; Molina-Fernandez, Iñigo (2014-09-09)
      Un receptor ‘colorless’ requerirá en su banda de operación de un elevado rechazo en modo común CMRR para reducir eficientemente la interferencia en banda base ocasionada por los canales colindantes al detectado y conseguir ...
    • Robust and tunable integrated polarization rotator 

      Alonso-Ramos, C.; Halir, Robert; Ortega-Moñux, Alejandro; Cheben, Pavel; Vivien, Laurent; [et al.] (2014-03-11)
      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 ...
    • Separador de polarización integrado de altas prestaciones basado en estructuras sub-longitud de onda 

      Luque-González, José Manuel; Herrero-Bermello, Alaine; Ortega-Moñux, Alejandro; Sánchez-Rodriguez, Marina; Velasco, Aitor V.; [et al.] (2020-12-03)
      Polarization management is a key factor in photonics integration platforms with high birefringence such as Silicon-On- Insulator. Here we design a directional coupler polarization beam splitter composed of two subwavelength ...
    • Silicon high performance devices using subwavelength structures 

      Halir, Robert; Sánchez-Postigo, Alejandro; Luque-González, José; Herrero-Bermello, Alaine; Leuermann, Jonas; [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-on-insulator polarization controller with relaxed fabrication tolerances 

      Sarmiento-Merenguel, J.D; Alonso-Ramos, C.; Halir, Robert; Vivien, L.; Cheben, P.; [et al.] (2014-07-31)
      Polarization control is essential in applications ranging from optical communications to interferometric sensors. The implementation of in- tegrated polarization controllers is challenging as they require polariza- tion ...
    • Subwavelength gratings for sensing and polarization management 

      Wanguemert-Perez, Juan Gonzalo; Cheben, P.; Ortega-Moñux, Alejandro; Pérez-Galacho, D.; Alonso-Ramos, C.; [et al.] (2014-05-12)
      Sub-wavelength grating (SWGs) structures are becoming important building blocks in planar waveguide photonic devices [1]. SWG structures have been successfully applied in the design of a range of devices with remarkable ...