Optimising Cross-Reactive Plasmonic Arrays for Biosensing Applications

Christie, I., Peveler, W. J. and Clark, A. W. (2023) Optimising Cross-Reactive Plasmonic Arrays for Biosensing Applications. In: SPIE BiOS 2023: Plasmonics in Biology and Medicine XX, San Francisco, CA, USA, 28 Jan - 03 Feb 2023, (doi: 10.1117/12.2649244)

Abstract

Extraordinary optical transmission (EOT) in nanohole arrays has proven to be a useful tool for biosensing applications. The enhanced light transmission observed in these structures is due to interactions between propagating surface waves and localised resonances. In this paper we present methods to both optimise the resonance peaks of nanohole array sensors and to tune their resonance wavelength. Sensor performance is enhanced by annealing. Annealing significantly increases the grain size of the gold thin-film, reducing losses and narrowing the resonance width. In addition, we show that by changing the size and arrangement of nanoholes we can control the position of their resonance peak. In doing so, we seek to improve the performance of EOT sensors for cross-reactive sensing applications.

• Item Type: Conference Proceedings
• Keywords: Plasmonics, enhanced optical transmission, nanoholes, annealing, biosensing.
• Status: Published
• Refereed: No
• Glasgow Author(s) Enlighten ID: Peveler, Dr William and Christie, Mr Iain and Clark, Professor Alasdair
• Authors: Christie, I., Peveler, W. J., and Clark, A. W.
• College/School: College of Science and Engineering > School of Chemistry; College of Science and Engineering > School of Engineering; College of Science and Engineering > School of Engineering > Biomedical Engineering
• ISSN: 1605-7422
• Copyright Holders: Copyright © 2023 SPIE
• First Published: First published in Proceedings of SPIE 12396:1239608
• Publisher Policy: Reproduced in accordance with the publisher copyright policy