1. Integrated Photonic Platform for Robust Differential Refractive Index Sensor
- Author
-
Andre L. Moras, Valnir C. S. Junior, Mario C. M. M. Souza, Giuseppe A. Cirino, Antonio A. G. Von Zuben, Luis A. M. Barea, and Newton C. Frateschi
- Subjects
Optical sensing and sensors ,Sensor ,Integrated optics devices ,Applied optics. Photonics ,TA1501-1820 ,Optics. Light ,QC350-467 - Abstract
We demonstrate an integrated photonic platform comprising a refractive index (RI) sensor based on Photonic Molecule (PM) that effectively mitigates the influence of environmental perturbations using a differential measurement scheme while providing high quality-factor (Q) resonances. The RI sensor consists of a partially unclad microdisk resonator coupled to an external clad microring resonator fabricated on silicon-on-insulator (SOI) platform. We report a RI sensitivity of 24 nm/RIU, achieving a limit of detection (LOD) of 1.7 × 10-3 refractive index units (RIU) with improved stability for an operation range of 0.15 RIU in a compact footprint of 40 × 40 μm2, representing an important solution for real-life applications in which measurement conditions are not easily controllable.
- Published
- 2020
- Full Text
- View/download PDF