RT Journal Article
T1 Narrowband Bragg filters based on subwavelength grating waveguides for silicon photonic sensing
A1 Pérez-Armenta, Carlos
A1 Ortega-Moñux, Alejandro
A1 Ctyroký, Jirí
A1 Cheben, Pavel
A1 Schmid, Jens H.
A1 Halir, Robert
A1 Molina-Fernández, Íñigo
A1 Wangüemert-Pérez, J. Gonzalo
K1 Optics and photonics
K1 Lab-on-a-chip devices
K1 Technological development
K1 Narrow band imaging
K1 Óptica y fotónica
K1 Dispositivos laboratorio en un chip
K1 Desarrollo tecnológico
K1 Imagen de banda estrecha
AB Subwavelength 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.
PB Optica Publishing Group
YR 2020
FD 2020-12-02
LK http://hdl.handle.net/10668/3465
UL http://hdl.handle.net/10668/3465
LA en
NO Pérez-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.
DS RISalud
RD Apr 8, 2025