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    Enhanced extraordinary optical transmission (EOT) through arrays of bridged nanohole pairs and their sensing applications

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    Type
    Article
    Authors
    Yue, Weisheng
    Wang, Zhihong
    Yang, Yang
    Li, Jingqi
    Wu, Ying cc
    Chen, Longqing
    Ooi, Boon S. cc
    Wang, Xianbin
    Zhang, Xixiang cc
    KAUST Department
    Advanced Nanofabrication, Imaging and Characterization Core Lab
    Applied Mathematics and Computational Science Program
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Core Labs
    Electrical Engineering Program
    Imaging and Characterization Core Lab
    Material Science and Engineering Program
    Nanofabrication Core Lab
    Photonics Laboratory
    Physical Science and Engineering (PSE) Division
    Waves in Complex Media Research Group
    Date
    2014
    Permanent link to this record
    http://hdl.handle.net/10754/563218
    
    Metadata
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    Abstract
    Extraordinary optical transmission (EOT) through arrays of gold nanoholes was studied with light across the visible to the near-infrared spectrum. The EOT effect was found to be improved by bridging pairs of nanoholes due to the concentration of the electromagnetic field in the slit between the holes. The geometrical shape and separation of the holes in these pairs of nanoholes affected the intensity of the transmission and the wavelength of resonance. Changing the geometrical shapes of these nanohole pairs from triangles to circles to squares leads to increased transmission intensity as well as red-shifting resonance wavelengths. The performance of bridged nanohole pairs as a plasmonic sensor was investigated. The bridged nanohole pairs were able to distinguish methanol, olive oil and microscope immersion oil for the different surface plasmon resonance in transmission spectra. Numerical simulation results were in agreement with experimental observations. © 2014 the Partner Organisations.
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    Nanoscale
    DOI
    10.1039/c4nr01001a
    PubMed ID
    24898441
    ae974a485f413a2113503eed53cd6c53
    10.1039/c4nr01001a
    Scopus Count
    Collections
    Nanofabrication Core Lab; Articles; Imaging and Characterization Core Lab; Applied Mathematics and Computational Science Program; Physical Science and Engineering (PSE) Division; Electrical Engineering Program; Material Science and Engineering Program; Photonics Laboratory; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

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