Pérez-Armenta, CarlosOrtega-Moñux, AlejandroCtyroký, JiríCheben, PavelSchmid, Jens H.Halir, RobertMolina-Fernández, ÍñigoWangüemert-Pérez, J. Gonzalo2022-03-072022-03-072020-12-02Pérez-Armenta C, Ortega-Moñux A, Ctyroký J, Cheben P, Schmid JH, Halir R, et al. Narrowband Bragg filters based on subwavelength grating waveguides for silicon photonic sensing. Opt Express. 2020 Dec 7;28(25):37971-37985.http://hdl.handle.net/10668/3465Subwavelength grating (SWG) waveguides have been shown to provide enhanced light-matter interaction resulting in superior sensitivity in integrated photonics sensors. Narrowband integrated optical filters can be made by combining SWG waveguides with evanescently coupled Bragg gratings. In this paper, we assess the sensing capabilities of this novel filtering component with rigorous electromagnetic simulations. Our design is optimized for an operating wavelength of 1310 nm to benefit from lower water absorption and achieve narrower bandwidths than at the conventional wavelength of 1550 nm. Results show that the sensor achieves a sensitivity of 507 nm/RIU and a quality factor of 4.9 × 104, over a large dynamic range circumventing the free spectral range limit of conventional devices. Furthermore, the intrinsic limit of detection, 5.1 × 10-5 RIU constitutes a 10-fold enhancement compared to state-of-the-art resonant waveguide sensors.enAtribución-NoComercial 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc/4.0/Optics and photonicsLab-on-a-chip devicesTechnological developmentNarrow band imagingÓptica y fotónicaDispositivos laboratorio en un chipDesarrollo tecnológicoImagen de banda estrechaMedical Subject Headings::Technology and Food and Beverages::Technology, Industry, and Agriculture::Engineering::Optics and PhotonicsMedical Subject Headings::Phenomena and Processes::Physical Phenomena::Magnetic Phenomena::Electromagnetic PhenomenaMedical Subject Headings::Technology and Food and Beverages::Technology, Industry, and Agriculture::Manufactured Materials::Biomedical and Dental Materials::Polymers::Siloxanes::SiliconesMedical Subject Headings::Disciplines and Occupations::Natural Science Disciplines::Science::ResearchMedical Subject Headings::Technology and Food and Beverages::Technology, Industry, and Agriculture::TechnologyMedical Subject Headings::Analytical, Diagnostic and Therapeutic Techniques and Equipment::Equipment and Supplies::Electrical Equipment and Supplies::Micro-Electrical-Mechanical Systems::Lab-On-A-Chip DevicesMedical Subject Headings::Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Optical Imaging::Narrow Band Imagingresearch article33379620Acceso abierto10.1364/OE.4043641094-4087