Constructing a novel asymmetric dielectric structure toward the realization of high-performance surface plasmon resonance biosensors

Nan Fu Chiu, Wei Che Lee, Ting Shiuan Jiang

    研究成果: 雜誌貢獻期刊論文同行評審

    11 引文 斯高帕斯(Scopus)

    摘要

    This paper is intended to demonstrate the effect of the high refractive index of an intermediary zinc oxide (ZnO) layer to improving the full width at half maximum (FWHM) of the surface plasmon resonance (SPR) reflectance curve. This case is an asymmetric dielectric structure (ADS) of low-loss surface plasmon resonance (LLSPR). The ADS-LLSPR chip is particularly interesting for two surface plasmons (SPs) mode of external and internal on a gold (Au) interface. These SPs have different energy fields, which enables separation of the surface and bulk refractive index changes. We optimize ZnO and Au thin films thicknesses through analytical comparisons with conventional SPR structures. Upon exposure to ethanol, the ADS-LLSPR chip showed a 2-times decrease in the FWHM and a 4.5-times larger shift in intensity interrogation. The ADS-LLSPR chip exhibits a widely linearity range, high accuracy and high sensitivity. This characteristic of the ADS-LLSPR chip is the basis for early diagnosis crucial in DNA-based viruses.

    原文英語
    文章編號6522466
    頁(從 - 到)3483-3489
    頁數7
    期刊IEEE Sensors Journal
    13
    發行號9
    DOIs
    出版狀態已發佈 - 2013 八月 26

    ASJC Scopus subject areas

    • 儀器
    • 電氣與電子工程

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