• Automatic design of high-performance fiber-chip surface grating couplers based on Floquet-Bloch mode analysis 

      Sánchez Postigo, Alejandro; Xu, Dan-Xia; Hadij-Elhouati, Abdelfettah; Molina-Fernandez, Iñigo; Ortega-Moñux, Alejandro; [et al.] (2018-04-30)
      We propose a new strategy to automatically design highly efficient fiber-chip surface grating couplers. High performance designs are achieved with a substantially reduced computational cost by combining Floquet-Bloch mode ...
    • Colorless devices and reception techniques for polarization multiplexed communications 

      Halir, Robert; Reyes-Iglesias, Pedro; Alonso-Ramos, C.; Sarmiento-Merenguel, Darío; Wanguemert-Perez, Juan Gonzalo; [et al.] (2015-06-29)
      Future optical networks call for flexible, high performance and low cost coherent optical receivers. We present here several advances towards such receivers, including integrated optical couplers with ultra-broad bandwidth, as ...
    • Comparing the fundamental limit of detection for interferometric and resonant biosensors with coherent phase read-out 

      Leuermann, Jonas; Molina-Fernández, Íñigo; Ortega-Moñux, Alejandro; Wanguemert-Perez, Juan Gonzalo; Halir, Robert (2019-06-27)
      We compare the limit of detection of coherently interrograted photonic biosensors, using both interferometric and resonant architectures.
    • Desarrollo de herramientas numéricas para el análisis y diseño de dispositivos fototónicos 

      Ortega Moñux, Alejandro (Universidad de Málaga,Servicio de Publicaciones, 2008)
      En esta Tesis, el objetivo fundamental es mejorar las prestaciones de una familia de técnicas numéricas de simulación de dispositivos ópticos que se conoce con el nombre genérico de Métodos Globales o Espectrales. ...
    • Designing anisotropy with waveguide subwavelength structures 

      Herrero-Bermello, Alaine; Velasco, Aitor; Schmid, Jens; Cheben, Pavel; Halir, Robert; [et al.] (2018-07-12)
      Silicon sub-wavelength structures have become a versatile design tool for practical, high-performance integrated optical devices, ranging from highly efficient grating couplers to ultra-broadband beam-splitters. Recently, ...
    • Diffractive sidewall grating coupler: towards 2D free-space optics on chip. 

      Hadij-ElHouati, Abdelfettah; Cheben, Pavel; Ortega-Moñux, Alejandro; Wanguemert-Perez, Juan Gonzalo; Halir, Robert; [et al.] (2019-05-02)
      Silicon photonics has been the subject of intense research efforts. In order to implement complex integrated silicon photonic devices and systems, a wide range of robust building blocks is needed. Waveguide couplers are ...
    • Diseño de grating couplers de orden cero de banda ancha y alta eficiencia para el infrarrojo medio 

      Sánchez-Postigo, Alejandro; Wanguemert-Perez, Juan Gonzalo; Luque-Gonzaléz, José Manuel; Molina-Fernández, Íñigo; Cheben, Pavel; [et al.] (2017-09-27)
      The mode fields of optical fibers and high-index contrast photonic waveguides have different dimensions, making difficult the coupling of light from one to the other. To solve this problem, surface grating couplers are one ...
    • 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 ...
    • 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 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.
    • 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-Fernández, Íñigo; [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 ...
    • 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 ...