ArticleSensors (Basel, Switzerland)2018
THz Sensing With Anomalous Extraordinary Optical Transmission Hole Arrays.
Article in Sensors (Basel, Switzerland), 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Huygens metasurface supporting quasi-bound states in the continuum for terahertz gas sensing.Scientific reports · 2025Article
- Quasi-BIC based all-dielectric metasurfaces for ultra-sensitive refractive index and temperature sensing.Scientific reports · 2023Article
- Article
- Enhanced extraordinary terahertz transmission through coupling between silicon resonators.Nanoscale advances · 2022Article
- Article
- Labyrinth Metasurface for Biosensing Applications: Numerical Study on the New Paradigm of Metageometries.Sensors (Basel, Switzerland) · 2019Article
- Encoded-Enhancement of THz Metasurface Figure of Merit for Label-Free Sensing.Sensors (Basel, Switzerland) · 2019Article
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Authors and funding
5 authors.
Funding
Abstract
Subwavelength hole array (HA) metasurfaces support the so-called extraordinary optical transmission (EOT) resonance that has already been exploited for sensing. In this work, we demonstrate the superior performance of a different resonant regime of HA metasurfaces called anomalous EOT, by doing a thorough numerical and experimental study of its ability in thin-film label-free sensing applications in the terahertz (THz) band. A comprehensive analysis using both the regular and anomalous EOT resonances is done by depositing thin layers of dielectric analyte slabs of different thicknesses on the structures in different scenarios. We carry out a detailed comparison and demonstrate that the best sensing performance is achieved when the structure operates in the anomalous EOT resonance and the analyte is deposited on the non-patterned side of the metasurface, improving by a factor between 2 and 3 the results of the EOT resonance in any of the considered scenarios. This can be explained by the comparatively narrower linewidth of the anomalous EOT resonance. The results presented expand the reach of subwavelength HAs for sensing applications by considering the anomalous EOT regime that is usually overlooked in the literature.
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