• A general approach for robust integrated polarization rotators 

      Alonso-Ramos, C.; Halir, Robert; Ortega Moñux, Alejandro; Cheben, Pavel; Vivien, Laurent; [et al.] (International Society for Optics and Photonics, 2013)
      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 ...
    • 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 ...
    • 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)
    • 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 ...
    • 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 ...