Miniaturized spectroscopy with tunable and sensitive plasmonic structures

Liang, L., Zheng, Q., Wen, L., Cumming, D. R.S. and Chen, Q. (2021) Miniaturized spectroscopy with tunable and sensitive plasmonic structures. Optics Letters, 46(17), pp. 4264-4267. (doi: 10.1364/OL.426624)

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Broad linewidth and a lack of spectral analysis limit the applications of plasmonic sensors. In this paper, a plasmonic sensor with a high sensing FoM above 900 RIU-1 in the terahertz range is proposed based on high-quality factor (>1000) surface lattice resonance in subwavelength near-flat metallic gratings. Moreover, such a highly selective spectral manipulating scheme plus the greatly localized plasmonic resonance enables miniaturized spectroscopy based on a single detector by integrating an electro-optical material with the gratings. A spectral resolution of 0.1 GHz at a center frequency of 1.1 THz is predicted showing a four times improvement of measuring efficiency. This technique show promising potentials in on-site matter inspection and point-of-care testing.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Cumming, Professor David
Authors: Liang, L., Zheng, Q., Wen, L., Cumming, D. R.S., and Chen, Q.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Optics Letters
Publisher:Optical Society of America
ISSN (Online):1539-4794
Published Online:02 July 2021
Copyright Holders:Copyright © 2021 Optical Society of America
First Published:First published in Optics Letters 46(17): 4264-4267
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
305567QuantIC - The UK Quantum Technoogy Hub in Quantum Enhanced ImagingMiles PadgettEngineering and Physical Sciences Research Council (EPSRC)EP/T00097X/1P&S - Physics & Astronomy