High-mode spoof SPP of periodic metal grooves for ultra-sensitive terahertz sensing

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Yao, Haizi and Zhong, Shuncong (2014) High-mode spoof SPP of periodic metal grooves for ultra-sensitive terahertz sensing. Optics Express, 22 (21). pp. 25149-25160. ISSN 1094-4087 (https://doi.org/10.1364/OE.22.025149)

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Abstract

We report terahertz surface plasmon resonance (SPR) sensing based on prism-coupling to the spoof surface plasmon polariton (SSPP) mode existing on periodically grooved metal films. It was demonstrated that, except for the fundamental mode of the SSPP, there was also a higher mode SSPP wave when the depth of groove was larger. Both fundamental and high-order modes of SSPP could be used for terahertz sensing. We compared the performance of different modes of SSPP on the sensing sensitivity using both reflection amplitude and phase-jump information. The results indicated that the gap distance between the prism base and the metal film had a significant influence on the reflectivity of SPR sensing by affecting the coupling efficiency of an evanescent wave to an SSPP wave; also, high-order mode SSPP-based sensing had a high sensitivity of up to 2.27 THz/RIU, which nearly doubled the sensitivity of the fundamental mode. The application of high-mode SSPP has enormous potential for ultra-sensitive SPR sensing in the terahertz regime.

  • Item type:Article
    ID code:53587
    Dates:
    Date
    Event
    20 October 2014
    Published
    7 October 2014
    Published Online
    25 September 2014
    Accepted
    Notes:© 2014 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.
    Subjects:Naval Science > Naval architecture. Shipbuilding. Marine engineering
    Department:Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering
    Depositing user: Pure Administrator
    Date deposited:03 Jul 2015 09:51
    Last modified:23 Dec 2024 07:17
    URI:https://strathprints.strath.ac.uk/id/eprint/53587
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