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Type: Journal article
Title: Enhancement of extraordinary optical transmission and sensing performance through coupling between metal nanohole and nanoparticle arrays
Author: Du, B.
Yang, Y.
Zhang, Y.
Jia, P.
Ebendorff-Heidepriem, H.
Ruan, Y.
Yang, D.
Citation: Journal of Physics D: Applied Physics, 2019; 52(27):275201-1-275201-10
Publisher: IOP Publishing
Issue Date: 2019
ISSN: 0022-3727
Statement of
Bobo Du, Yuan Yang, Yang Zhang, Peipei Jia, Heike Ebendorff-Heidepriem, Yinlan Ruan, and Dexing Yang
Abstract: The extraordinary optical transmission (EOT) of sub-wavelength nanohole array is significantly enhanced through introducing nanoparticles, including nanospheres and nanocylinders, into the centers of the nanoholes. Maxima of 56% and 48% for nanocylinder and nanosphere matrices are achieved, compared with that of 37% for a none-in-hole nanohole array gold film. The mechanism behind the phenomena is discussed, indicating that surface plasmon mode coupling between nanoholes and nanoparticles rather than Fabry–Pérot resonance is the cause for the EOT enhancement. High near-field intensity enhancement also leads to the interaction between analytes and optical field increasing, therefore an improved sensitivity and figure of merit for biosensing. The modified structures are highly promising in practical sensing applications due to the incident angle independence. Similar results are obtained for a hexagonal array of nanohole gold film and nanoparticle modifications thereof.
Keywords: Extraordinary optical transmission; sensing performance; nanohole; nanoparticle
Rights: © 2019 IOP Publishing Ltd Printed in the UK
RMID: 0030116563
DOI: 10.1088/1361-6463/ab1835
Appears in Collections:IPAS publications
Physics publications

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