• 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.
    • Integrated coherent reception and polarization management for next generation access networks. 

      Sarmiento Merenguel, Jose Dario (UMA Editorial, 2017-10-30)
      La fotónica, entendida como la ciencia de generar, detectar y manipular la luz, subyace bajo infinidad de tecnologías desde su aparición a principios de los años 60. Existe un amplio abanico de aplicaciones fotónicas que ...
    • 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; [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 ...
    • Low-loss curved waveguide grating wavelength demultiplexer 

      Hadj-Elhouati, Abdelfettah; Ortega-Moñux, Alejandro; Wangüemert-Pérez, J. Gonzalo; Halir, Robert; Wang, Shurui; [et al.] (2021)
      We demonstrate a compact wavelength demultiplexer for the silicon on insulator platform based on the curved waveguide grating (CWG) architecture. We mitigate off-chip radiation loss by enforcing the single beam condition ...
    • 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)
    • Photonic Reflectometer on Silicon-on-Insulator 

      Halir, Robert (Universidad de Málaga, Servicio de Publicaciones, 2010)
      A photonic reflectometer on Silicon-on-Insulator is designed and experimentally characterized. The reflectometer is a six-port device, composed of multimode interference couplers (MMIs). We propose a design approach for ...
    • 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 ...
    • 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 ...
    • Subwavelength Index Engineering for SOI Waveguides 

      Halir, Robert; Luque-González, J.M.; Wang, S.; Sarmiento-Merenguel, Jose Darío; Sánchez-Postigo, A.; [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, Jose Manuel; Sarmiento-Merenguel, Darío; [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-Perez, Juan Gonzalo; Sanchez Postigo, Alejandro; Hadij-ElHouati, Abdelfettah; Pereira-Martin, Daniel; Luque-González, José Manuel; [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-Perez, Juan Gonzalo; Sanchez-Postigo, Alejandro; Luque-González, Jose Manuel; Sarmiento-Merenguel, Jose Darío; Halir, Robert; [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 ...