Environmental Sensitivity of Fabry-Perot Microcavities Induced by Layered Graphene-Dielectric Hybrid Coatings

• Type: Article in International Scientific Journal
• Date: 2021

Authors

Peixoto, R (Author) Other; Pires, JPS (Author) FCUP; Monteiro, CS (Author) Other; Raposo, M (Author) Other; Ribeiro, PA (Author) Other; Susana Silva (Author) FCUP; Frazao, O (Author) FEUP; Lopes, JMVP (Author) FCUP

Journal

Title: Physical Review Applied

Vol. 16

ISSN: 2331-7019

Publisher: American Physical Society

Indexing

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Other information

Authenticus ID: P-00V-N4N

DOI: 10.1103/physrevapplied.16.044041

Abstract (EN): We propose a fiber-based environmental sensor that exploits the reflection-phase-shift tunability provided by the use of layered coatings composed of dielectric slabs spaced by conducting membranes. A transfer-matrix study is done in a simplified theoretical model, for which an enhanced sensitivity of the reflection interference pattern to the output medium is demonstrated, in the typical refractive index range of liquid media. An experimental configuration using a cascaded Fabry-Perot microcavity coated by a graphene oxide/polyethylenimine (GO/PEI) multilayered structure is demonstrated. Its cost-effective chemical production method makes graphene oxide-based hybrid coatings excellent candidates for future real-life sensing devices.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14