SARS-CoV-2 detecting rapid metasurface-based sensor

Patel, Shobhit K.; Surve, Jaymit; Parmar, Juveriya; Aliqab, Khaled; Alsharari, Meshari; Armghan, Ammar

doi:10.1016/j.diamond.2022.109644

Cited by 19 publications

(6 citation statements)

References 53 publications

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“…The limit of detection (LOD) of the sensing platform is an important parameter. The LOD is expressed as: LOD = false( normalΔ n false) false( 1.5 false) true( FWHM normalΔ λ true) 1.25 …”

Section: Resultsmentioning

confidence: 99%

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A High-Sensitivity Refractive Index Sensor with Period-Doubling Plasmonic Metasurfaces to Engineer the Radiation Losses

Jiang

Zhu

et al. 2023

ACS Appl. Opt. Mater.

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Plasmonic nanostructures with strong on-resonance local electric fields at the metal interfaces provide an excellent means for sensing applications. However, most plasmonic resonances suffer from relatively broad bandwidths, mainly due to the intrinsic material dissipation, restricting the optical performances. Moreover, little attention is paid on the radiation loss. In this work, we utilize quasi-guided modes supported by a metallic disk array and demonstrate the manipulation of radiation losses to further improve the resonance property. When a relative angle is introduced between every two adjacent metallic disks in a subwavelength-period array to form a zigzag metasurface, the period doubles leading to a transition of the true guided modes to be flipped above the light cone into the quasi-guided modes with finite yet relatively high-quality factors. We demonstrate the application of these quasi-guided modes with reduced bandwidths as refractive index sensors. Our experiment demonstrates that a refractive index sensitivity as high as 655 nm/RIU can be achieved with this structure, which has a good agreement with the numerical results. This sensitivity outperforms many other plasmonic sensors, e.g., those based on localized surface plasmon resonances or detuned plasmonic resonators. The proposed scheme of using quasi-guided modes as the refractive index sensor provides a prospective platform for biological and chemical sensing.

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Section: Resultsmentioning

confidence: 99%

“…The limit of detection (LOD) of the sensing platform is an important parameter. The LOD is expressed as: …”

Section: Resultsmentioning

confidence: 99%

A High-Sensitivity Refractive Index Sensor with Period-Doubling Plasmonic Metasurfaces to Engineer the Radiation Losses

Jiang

Zhu

et al. 2023

ACS Appl. Opt. Mater.

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“…The authors suggested that their detection method could be further modified to diagnose other COVID viral variants and diseases. Furthermore, Patel et al 79 proposed a novel refractive index sensor (RIS) for the detection of ethyl butanoate (CH 3 CH 2 CH 2 COOCH 2 CH 3 ) arising from the exhaled breath of SARS-CoV-2-infected persons, which is based on graphene's characteristics, such as its high surface area and easy functionalization. Fig.…”

Section: Surface Plasmon Resonance Biosensorsmentioning

confidence: 99%

Graphene-based biosensors for detecting coronavirus: a brief review

Abrha,

Wondimu,

Kahsay

et al. 2023

Nanoscale

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“…17 The rapid development of two-dimensional materials, such as graphene, has provided a new perspective on the active control of THz waves (detection, imaging, object cloaking, etc. [18][19][20][21][22][23][24][25][26] ). In particular, the Fermi level of graphene can be shifted by electrostatic tuning of charge density, which enables dynamic manipulation of EM wave frequency and amplitude responses.…”

Section: Introductionmentioning

confidence: 99%