Comparative Analysis of Ethanol Gas Sensors Based on Bloch Surface Wave and Surface Plasmon Resonance

• Type: Article in International Conference Proceedings Book
• Date: 2024

Authors

Carvalho, PM (Author) Other; Almeida, AS (Author) Other; Mendes, P (Author) Other; Coelho, CC (Author) FCUP; de Almeida, JMMM (Author) FCUP

Conference proceedings International

Title: EPJ Web of Conferences

6th International Conference on Applications of Optics and Photonics, AOP 2024

Aveiro, 16 July 2024 through 19 July 2024

Indexing

Scopus - 0 Citations

Other information

Authenticus ID: P-017-A6G

DOI: 10.1051/epjconf/202430500016

Abstract (EN): Ethanol plays a crucial role in modern industrial processes and consumer products. Despite its presence in human activity, short and long-term exposure to gaseous ethanol poses risks to health conditions and material damage, making the control of its concentration in the atmosphere of high importance. Ethanol optical sensors based on electromagnetic surface waves (ESWs) are presented, with sensitivity to ethanol vapours being achieved by the inclusion of ethanol-adsorptive zinc oxide (ZnO) layers. The changes in optical properties modulate the resonant conditions of ESWs, enabling the tracking of ethanol concentration in the atmosphere. A comprehensive comparative study of sensor performance is carried out between surface plasmon resonance (SPR) and Bloch surface wave (BSW) based sensors. Sensor efficiency is simulated by transfer matrix method towards optimized figures of merit (FoM). Preliminary results validate ethanol sensitivity of BSW based sensor, showcasing a possible alternative to electromagnetic and plasmonic sensors. © The Authors.

Language: English

Type (Professor's evaluation): Scientific