Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/102411
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dc.contributor.authorCong, Longqingen
dc.contributor.authorWithayachumnankul, Withawaten
dc.contributor.authorZhang, Weilien
dc.contributor.authorSingh, Ranjanen
dc.contributor.authorCao, Weien
dc.contributor.authorAl-Naib, Ibraheemen
dc.date.accessioned2014-12-01T06:35:52Zen
dc.date.accessioned2019-12-06T20:54:31Z-
dc.date.available2014-12-01T06:35:52Zen
dc.date.available2019-12-06T20:54:31Z-
dc.date.copyright2014en
dc.date.issued2014en
dc.identifier.citationSingh, 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, 105(17), 171101,1-6.en
dc.identifier.issn0003-6951en
dc.identifier.urihttps://hdl.handle.net/10356/102411-
dc.identifier.urihttp://hdl.handle.net/10220/24273en
dc.description.abstractHigh 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.en
dc.format.extent6 p.en
dc.language.isoenen
dc.relation.ispartofseriesApplied physics lettersen
dc.rights© 2014 AIP Publishing LLC. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4895595]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.en
dc.subjectDRNTU::Science::Physicsen
dc.titleUltrasensitive terahertz sensing with high-Q Fano resonances in metasurfacesen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen
dc.identifier.doihttp://dx.doi.org/10.1063/1.4895595en
dc.description.versionPublished versionen
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