Optimising cross-reactive plasmonic arrays for biosensing applications

Iain Christie; William Peveler; Alasdair W. Clark

doi:10.1117/12.2649244

16 March 2023 Optimising cross-reactive plasmonic arrays for biosensing applications

Iain Christie, William Peveler, Alasdair W. Clark

Proceedings Volume 12396, Plasmonics in Biology and Medicine XX; 1239608 (2023) https://doi.org/10.1117/12.2649244
Event: SPIE BiOS, 2023, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

Iain Christie, William Peveler, and Alasdair W. Clark "Optimising cross-reactive plasmonic arrays for biosensing applications", Proc. SPIE 12396, Plasmonics in Biology and Medicine XX, 1239608 (16 March 2023); https://doi.org/10.1117/12.2649244

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