A THz graphene metasurface for polarization selective virus sensing.
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ArticleDate
2021-02-15Online Publication Date
2021-02-15Print Publication Date
2021-05Embargo End Date
2023-02-22Submitted Date
2020-10-15Permanent link to this record
http://hdl.handle.net/10754/667629
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We propose a novel method to exploit chirality of highly sensitive graphene plasmonic metasurfaces to characterize complex refractive indexes (RI) of viruses by detecting the polarization state of the reflected electric fields in the THz spectrum. A dispersive graphene metasurface is designed to produce chiral surface currents to couple linearly polarized incident fields to circularly polarized reflected fields. The metasurface sensing sensitivity is the result of surface plasmon currents that flow in a chiral fashion with strong intensity due to the underlying geometrical resonance. Consequently, unique polarization states are observed in the far-field with the ellipticity values that change rapidly with the analyte's RI. The determination of bimolecular RI is treated as an inverse problem in which the polarization states of the virus is compared with a pre-calculated calibration model that is obtained by full-wave electromagnetic simulations. We demonstrate the polarization selective sensing method by RI discrimination of three different types of Avian Influenza (AI) viruses including H1N1, H5N2, and H9N2 is possible. Since the proposed virus characterization method only requires determination of the polarization ellipses including its orientation at monochromatic frequency, the required instrumentation is simpler compared to traditional spectroscopic methods which need a broadband frequency scan.Citation
Amin, M., Siddiqui, O., Abutarboush, H., Farhat, M., & Ramzan, R. (2021). A THz graphene metasurface for polarization selective virus sensing. Carbon, 176, 580–591. doi:10.1016/j.carbon.2021.02.051Sponsors
This project was supported by Deanship of Scientific Research at Taibah University under Research Grant number ENG-1.Publisher
Elsevier BVJournal
CarbonPubMed ID
33612849Additional Links
https://linkinghub.elsevier.com/retrieve/pii/S0008622321002311ae974a485f413a2113503eed53cd6c53
10.1016/j.carbon.2021.02.051
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