1. Integrated Photonic Platform for Robust Differential Refractive Index Sensor
- Author
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Newton C. Frateschi, Andre L. Moras, Luis A. M. Barea, Valnir C. S. Junior, Mario C. M. M. Souza, Antonio A. G. von Zuben, and Giuseppe A. Cirino
- Subjects
lcsh:Applied optics. Photonics ,Materials science ,Silicon on insulator ,Integrated optics devices ,02 engineering and technology ,01 natural sciences ,Temperature measurement ,010309 optics ,Resonator ,0103 physical sciences ,lcsh:QC350-467 ,Optical sensing and sensors ,Electrical and Electronic Engineering ,Sensor ,business.industry ,lcsh:TA1501-1820 ,021001 nanoscience & nanotechnology ,Atomic and Molecular Physics, and Optics ,Differential measurement ,Optoelectronics ,Photonics ,0210 nano-technology ,business ,Sensitivity (electronics) ,Refractive index ,lcsh:Optics. Light - 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
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