The DOI matches its Crossref record; 42 of the 42 references it cites were found in a registry or an index.
Ultrasensitive terahertz sensing with high-Q Fano resonances in metasurfaces
Open accessAbstract
High quality factor resonances are extremely promising for designing ultra-sensitive refractive index label-free sensors, since it allows intense interaction between electromagnetic waves and the analyte material. Metamaterial and plasmonic sensing have recently attracted a lot of attention due to subwavelength confinement of electromagnetic fields in the resonant structures. However, the excitation of high quality factor resonances in these systems has been a challenge. We excite an order of magnitude higher quality factor resonances in planar terahertz metamaterials that we exploit for ultrasensitive sensing. The low-loss quadrupole and Fano resonances with extremely narrow linewidths enable us to measure the minute spectral shift caused due to the smallest change in the refractive index of the surrounding media. We achieve sensitivity levels of 7.75 × 103 nm/refractive index unit (RIU) with quadrupole and 5.7 × 104 nm/RIU with the Fano resonances which could be further enhanced by using thinner substrates. These findings would facilitate the design of ultrasensitive real time chemical and biomolecular sensors in the fingerprint region of the terahertz regime.
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Cites
Biosensing with plasmonic nanosensors
Anker, J. N., Hall, W. P., Lyandres, O., Shah, N. C., Zhao, J., & Van Duyne, R. P. (2008) · Nature Materials · doi:10.1038/nmat2162 · Cited by 6,786
Cutting-edge terahertz technology
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The Fano resonance in plasmonic nanostructures and metamaterials
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Materials for terahertz science and technology
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Fano resonances in nanoscale structures
Miroshnichenko, A. E., Flach, S., & Kivshar, Y. S. (2010) · Reviews of Modern Physics · doi:10.1103/revmodphys.82.2257 · Cited by 3,062
Optical negative-index metamaterials
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From metamaterials to metadevices
Zheludev, N. I., & Kivshar, Y. S. (2012) · Nature Materials · doi:10.1038/nmat3431 · Cited by 2,312
Far-infrared time-domain spectroscopy with terahertz beams of dielectrics and semiconductors
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Low-Loss Plasmonic Metamaterials
Boltasseva, A., & Atwater, H. A. (2011) · Science · doi:10.1126/science.1198258 · Cited by 1,543
Planar Metamaterial Analogue of Electromagnetically Induced Transparency for Plasmonic Sensing
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Metadata
- Authors
- Singh, R., Cao, W., Al-Naib, I., Cong, L., Withayachumnankul, W., & Zhang, W.
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2014-10-27
- Volume
- 105
- Issue
- 17
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2005001483
- Cited by
- 668
- References
- 42
- FWCI
- 16.72
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Singh, R., Cao, W., Al-Naib, I., Cong, L., Withayachumnankul, W., & Zhang, W. (2014). Ultrasensitive terahertz sensing with high-Q Fano resonances in metasurfaces. Applied Physics Letters. https://doi.org/10.1063/1.4895595
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