Plasmonic gold nanodiscs using piezoelectric substrate birefringence for liquid sensing

Hao, D., Kenney, M. G. and Cumming, D. R.S. (2016) Plasmonic gold nanodiscs using piezoelectric substrate birefringence for liquid sensing. Applied Physics Letters, 108(25), 251601. (doi: 10.1063/1.4954713)

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This article presents the simulation, fabrication, and experimental characterization of a surface plasmonic resonance (SPR) sensor integrated with an acoustic sensing compatible substrate. The SPR sensor is designed to work in the visible region with gold nanodisc arrays fabricated on LiNbO3, which is both piezoelectric and birefringent. A linear relationship between resonance wavelength and varying liquid refractive indices were observed in experiments, and a sensitivity of 165 nm/refractive index unit was obtained. Polarization effects of the birefringent property of the Y-cut LiNbO3 substrate have been investigated, which can also be applied to X-cut LiNbO3. Our study demonstrates the feasibility of an SPR sensor device utilizing a birefringent substrate, which has acoustic wave compatibility and can pave the way toward much more robust and flexible biosensing devices

Item Type:Articles
Additional Information:The authors wish to thank all the technical staff of the James Watt Nanofabrication Centre at Glasgow University for their contributions. This work is supported by an EPSRC grant (The Multicorder, EP/K021966/1)
Glasgow Author(s) Enlighten ID:Cumming, Professor David and Hao, Miss Danni and Kenney, Dr Mitchell Guy
Authors: Hao, D., Kenney, M. G., and Cumming, D. R.S.
College/School:College of Science and Engineering > School of Engineering
College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Applied Physics Letters
Publisher:American Institute of Physics
ISSN (Online):1077-3118
Published Online:21 June 2016
Copyright Holders:Copyright © 2016 American Institute of Physics
First Published:First published in Applied Physics Letters 108(25):251601
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
605821The Multi-Corder: Poly-Sensor TechnologyDavid CummingEngineering & Physical Sciences Research Council (EPSRC)EP/K021966/1ENG - ENGINEERING ELECTRONICS & NANO ENG