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Thin-film sensing with planar terahertz metamaterials: sensitivity and limitations
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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 mum 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.
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“Various techniques have been reported to improve the detection threshold for THz thin film sensing, e. g., evaluation of difference signals, 3 resonance changes of metamaterials, 4 or the application of metal meshes to enhance the amplitude reduction of the THz bandpass.5”
From Highly sensitive terahertz measurement of layer thickness using a two-cylinder waveguide sensor (2010) · cites this paper as [4]
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Metadata
- Authors
- O'Hara, J. F., Singh, R., Brener, I., Smirnova, E., Han, J., Taylor, A. J., & Zhang, W.
- Affiliations
- Oklahoma State University (US)
- Sandia National Laboratories (US)
- Los Alamos National Laboratory (US)
- Venue
- Optics Express
- Publisher
- Optica Publishing Group
- Published
- 2008
- Volume
- 16
- Issue
- 3
- Pages
- 1786
- ISSN
- 1094-4087 (ISSN-L)
- OpenAlex
- W2026644949
- Cited by
- 521
- References
- 25
- Citations by year
- 2026: 18 · 2025: 13 · 2024: 19 · 2023: 26 · 2022: 31 · 2021: 26 · 2020: 26 · 2019: 43 · 2018: 31 · 2017: 35 · 2016: 34 · 2015: 28 · 2014: 33 · 2013: 31 · 2012: 52
- FWCI
- 9.56
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Optics Express (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Science Foundation
- U.S. Department of Energy
- National Nuclear Security Administration
- Basic Energy Sciences
- Office of Experimental Program to Stimulate Competitive Research
- Sandia National Laboratories
- Los Alamos National Laboratory
- Topics
- Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Metamaterials and Metasurfaces Applications
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Microwave and Dielectric Measurement Techniques
- Keywords
- terahertz metamaterials, split ring resonator, resonant frequency shift, biosensing, sensitivity limits, terahertz time-domain spectroscopy
- MeSH terms
- Computer Simulation, Materials Testing, Membranes, Artificial, Models, Theoretical, Refractometry, Sensitivity and Specificity, Reproducibility of Results, Biosensing Techniques
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