Thin-film sensing with planar terahertz metamaterials: sensitivity and limitations.
John F. O'Hara,Ranjan Singh,Igal Brener,Evgenya I. Smirnova,Jiaguang Han,Antoinette J. Taylor,Weili Zhang +6 more
TLDR
The limiting effects of varying the thickness of a dielectric overlayer on planar double split-ring resonator (SRR) arrays are studied by terahertz time-domain spectroscopy and the bounds of resonance shifting are discussed.Abstract:
The limiting effects of varying the thickness of a dielectric overlayer on planar double split-ring resonator (SRR) arrays are studied by terahertz time-domain spectroscopy. Uniform dielectric overlayers from 100 nm to 16 µm thick are deposited onto fixed SRR arrays in order to shift the resonance frequency of the electric response. We discuss the bounds of resonance shifting and emphasize the resulting limitations for SRR-based sensing. These results are presented in the context of typical biosensing situations and are compared to previous work and other existing sensing platforms.read more
Citations
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An Overview of the Theory and Applications of Metasurfaces: The Two-Dimensional Equivalents of Metamaterials
Christopher L. Holloway,Edward F. Kuester,Joshua A. Gordon,John F. O'Hara,James C. Booth,David R. Smith +5 more
TL;DR: Metamaterials are typically engineered by arranging a set of small scatterers or apertures in a regular array throughout a region of space, thus obtaining some desirable bulk electromagnetic behavior as mentioned in this paper.
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Ultrasensitive terahertz sensing with high-Q Fano resonances in metasurfaces
TL;DR: In this paper, a planar terahertz metamaterial was used for ultra-sensitive sensing in the fingerprint region of the tera-hertz regime, where the low-loss quadrupole and Fano resonances with extremely narrow linewidths were used to measure the minute spectral shift caused due to the smallest change in the refractive index of the surrounding media.
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Silk Materials – A Road to Sustainable High Technology
TL;DR: This review addresses the use of silk protein as a sustainable material in optics and photonics, electronics and optoelectronic applications, and options represent additional developments for this technology platform that compound the broad utility and impact of this material for medical needs.
Journal ArticleDOI
Metamaterials application in sensing.
TL;DR: The principle, detecting process and sensitivity of three distinct types of sensors based on metamaterials, as well as their challenges and prospects are reviewed and the design guidelines for each sensor and its performance are compared and summarized.
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Experimental demonstration of ultrasensitive sensing with terahertz metamaterial absorbers: A comparison with the metasurfaces
TL;DR: In this article, the authors demonstrate a metamaterial absorber based ultra-sensitive sensing scheme at the terahertz frequencies with significantly enhanced sensitivity and an order of magnitude higher figure of merit compared to planar metasurfaces.
References
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Terahertz technology in biology and medicine
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