Íñigo Molina-Fernández

TL;DR: Sub-wavelength structures with a subwavelength pitch have been known since Hertz conducted his first experiments on the polarization of electromagnetic waves as discussed by the authors, and their applications include anti-reflective coatings, polarization rotators, high-efficiency fiber-chip cou-plers, spectrometers, highreflectivity mirrors, athermal waveg- uides, multimode interference couplers.

TL;DR: A silicon waveguide-fiber grating coupler that uses a subwavelength microstructure to achieve a continuously variable grating strength yet can be fabricated using only a single etch step is proposed.

TL;DR: A fully etched, continuously apodized fiber-to-chip surface grating coupler for the first time (to the authors' knowledge), fabricated in a single-etch step and operates with TM-polarized light.

TL;DR: A comprehensive review of the state of the art in subwavelength silicon structures, including recent applications including broadband waveguide couplers, high-sensitivity evanescent field sensors, low-loss devices for mid-infrared photonics, polarization management structures, spectral filters, and highly efficient fiber-to-chip coupler.

TL;DR: It is shown that by subwavelength patterning of silicon-wire waveguides the field delocalization can be engineered to increase the sensitivity, achieving sensitivities of 0.83 RIU/RIU and 1.5·10(-3)‬ RIU/nm for bulk and surface sensing.