• 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 ...
    • 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 ...
    • 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 ...
    • Suspended silicon integrated platform for the long-wavelength mid-infrared band 

      Sanchez-Postigo, Alejandro; Wanguemert-Perez, Juan Gonzalo; Soler-Penadés, Jordi; Ortega-Moñux, Alejandro; Nedeljkovic, Milos; [et al.] (2019-07-18)
      The atmospheric-transmission window and the fingerprint region of many substances overlaps with the long-wave infrared band. This has enabled the emergence of a new path for photonic integrated circuits, which could exploit ...
    • Suspended Waveguide Platforms for Mid-Infrared Group IV Photonics 

      Sanchez Postigo, Alejandro (UMA Editorial, 2019)
      En las últimas décadas, la banda del infrarrojo medio (2-20 µm) ha despertado un gran interés en la comunidad científica dedicada a la fotónica del Grupo IV. Este auge se debe a las múltiples aplicaciones que pueden ...
    • Ultra-broadband Silicon Photonic Multimode Interference Coupler 

      Halir, Robert; Cheben, Pavel; Luque-González, Jose Manuel; Sarmiento-Merenguel, Jose Darío; Schmid, Jens; [et al.] (ECIO, 2017)
      In integrated optics, multimode interference couplers (MMIs) are used as light-wave splitters and combiners in a wide variety of devices ranging from spectrometers to sensors and coherent optical receivers. While their ...