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Integrated Photonic Platform for Robust Differential Refractive Index Sensor

Authors :
Andre L. Moras
Valnir C. S. Junior
Mario C. M. M. Souza
Giuseppe A. Cirino
Antonio A. G. Von Zuben
Luis A. M. Barea
Newton C. Frateschi
Source :
IEEE Photonics Journal, Vol 12, Iss 5, Pp 1-10 (2020)
Publication Year :
2020
Publisher :
IEEE, 2020.

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.

Details

Language :
English
ISSN :
19430655
Volume :
12
Issue :
5
Database :
Directory of Open Access Journals
Journal :
IEEE Photonics Journal
Publication Type :
Academic Journal
Accession number :
edsdoj.04aa4d54275a4873897c1d1bc393c98e
Document Type :
article
Full Text :
https://doi.org/10.1109/JPHOT.2020.3024856