Extraordinary Transmission Characteristics of Subwavelength Nanoholes with Rectangular Lattice
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11468_2016_311_ReferencePDF.pdf
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Author(s)
Dršata, Martin
Ekşioğlu, Yasa
Petráček, Jiří
Cetin, Arif Engin
Date Issued
June 2016
Journal
Plasmonics
Publisher
Springer US
Citation
Cetin, Arif E., et al. “Extraordinary Transmission Characteristics of Subwavelength Nanoholes with Rectangular Lattice.” Plasmonics, vol. 12, no. 3, June 2017, pp. 655–61.
Version
Author's final manuscript
Abstract
We investigate the extraordinary optical transmission (EOT) properties of nanohole arrays with a rectangular lattice for label-free refractive index sensing applications. We show that the deviation within the periodicities along the two axes at the nanohole plane leads to more advantageous spectral quality of EOT signal compared to the conventional square lattice geometries. We introduce a way to further improve the sensitivity of the aperture system by carefully choosing the periodicities. We introduce nanohole arrays with a rectangular lattice supporting EOT signals with larger figure-of-merit values as well as enabling much stronger light transmission. We also model a nanohole system covered with a thin dielectric layer, mimicking biomolecules captured on the gold surface, in order to show its biosensing capability. We also show that certain deviation amounts between periodicities create spectral splitting within the EOT signal leading to larger spectral shifts in the presence of a thin dielectric film. Keywords: Plasmonics, Nanoholes, Extraordinary optical transmission, Rectangular lattice, Label-free biosensing
MIT Department
Koch Institute for Integrative Cancer Research at MIT
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1007/s11468-016-0311-5
