Identification of the Optimal Spectral Region for Plasmonic and Nanoplasmonic Sensing

Otte, Marinus A.; Sepúlveda, Borja; Ni, Weihai; Juste, Javier; Liz‐Marzán, Luis M.; Lechuga, Laura M.

doi:10.1021/nn901024e

Cited by 188 publications

(214 citation statements)

References 28 publications

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“…[49] (metallic metasurfaces). The calculated value of S B;λ 1000 nm∕RIU is comparable to those obtained for a gold flat interface [46]. This value of sensitivity is also higher when compared against S B;θ reported in Ref.…”

Section: Resultssupporting

confidence: 82%

“…[52] (MoS 2 /graphene hybrid structures). A final comparison in terms of the FOM parameter also shows a better performance of the proposal presented in this contribution than previously reported values for this parameter [46,48,51,52].…”

Section: Resultsmentioning

confidence: 51%

“…[22] (excitation by dielectric grating), Ref. [46] (single gold nanorods), Ref. [47] (aluminum gratings coated with gold), Ref.…”

Section: Resultsmentioning

confidence: 99%

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High-sensitivity integrated devices based on surface plasmon resonance for sensing applications

Elshorbagy¹,

Cuadrado²,

Alda³

2017

Photon. Res.

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A metallic nanostructured array that scatters radiation toward a thin metallic layer generates surface plasmon resonances for normally incident light. The location of the minimum of the spectral reflectivity serves to detect changes in the index of refraction of the medium under analysis. The normal incidence operation eases its integration with optical fibers. The geometry of the arrangement and the material selection are changed to optimize some performance parameters as sensitivity, figure of merit, field enhancement, and spectral width. This optimization takes into account the feasibility of the fabrication. The evaluated results of sensitivity (1020 nm/RIU) and figure of merit (614 RIU −1 ) are competitive with those previously reported.

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Section: Resultssupporting

confidence: 82%

Section: Resultsmentioning

confidence: 51%

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High-sensitivity integrated devices based on surface plasmon resonance for sensing applications

Elshorbagy¹,

Cuadrado²,

Alda³

2017

Photon. Res.

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show abstract

“…[91][92][93][94] Nanoscale plasmonic structures consisting of metallic particles and/or apertures provide new avenues for biosensing and spectroscopy due to their ability to generate dramatic field enhancements and spatially confine light on the nanometer scale. [95][96][97][98][99][100][101][102][103] In particular, nanoaperture arrays support extraordinary optical transmission through the exploitation of plasmonic modes excited by the grating orders of the array. 104,105 These plasmonic modes are highly sensitive to minute changes in the near-field refractive index of the nanoaperture.…”

Section: Introductionmentioning

confidence: 99%

Handheld high-throughput plasmonic biosensor using computational on-chip imaging

et al. 2014

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We demonstrate a handheld on-chip biosensing technology that employs plasmonic microarrays coupled with a lens-free computational imaging system towards multiplexed and high-throughput screening of biomolecular interactions for point-of-care applications and resource-limited settings. This lightweight and field-portable biosensing device, weighing 60 g and 7.5 cm tall, utilizes a compact optoelectronic sensor array to record the diffraction patterns of plasmonic nanostructures under uniform illumination by a single-light emitting diode tuned to the plasmonic mode of the nanoapertures. Employing a sensitive plasmonic array design that is combined with lens-free computational imaging, we demonstrate label-free and quantitative detection of biomolecules with a protein layer thickness down to 3 nm. Integrating large-scale plasmonic microarrays, our on-chip imaging platform enables simultaneous detection of protein mono-and bilayers on the same platform over a wide range of biomolecule concentrations. In this handheld device, we also employ an iterative phase retrieval-based image reconstruction method, which offers the ability to digitally image a highly multiplexed array of sensors on the same plasmonic chip, making this approach especially suitable for high-throughput diagnostic applications in field settings.

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“…4 Several SPR biosensing configurations can be distinguished, 5 depending on the characteristics of the light interacting with the SPP that are evaluated ͑SPR with angular, wavelength, intensity, phase, or polarization interrogation͒. Even though the sensitivity of SPR sensors is highly dependent on the spectral position of the resonance, 6 their performance is not linked to the employed excitation or interrogation technique. 7 Therefore, due to its simplicity and low-cost, the intensityinterrogated SPR configuration is one of the most widely employed.…”

Section: Introductionmentioning

confidence: 99%

Au/Fe/Au multilayer transducers for magneto-optic surface plasmon resonance sensing

Regatos¹,

Fariña²,

Calle³

et al. 2010

Journal of Applied Physics

100

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In this paper, we analyze the magnetoplasmonic ͑MP͒ features and sensing capabilities of Au/Fe/Au trilayer structures, as transducers of the magneto-optic surface plasmon resonance ͑MOSPR͒ biosensor. This biosensor, which can surpass the sensitivity of the standard SPR sensor, is based on a MP modulation technique generated by the simultaneous stimulation of the surface plasmon polaritons ͑SPP͒ and the transversal magneto-optical Kerr effect ͑TMOKE͒. We study the magneto-optical activity of the trilayers as a function of the thickness and position of the Fe layer. We first demonstrate that this kind of structure allows modulating the SPP through an external magnetic field and moreover, induce a strong enhancement of the TMOKE effect. The modulation of the SPP is linearly proportional to the thickness of Fe layer and inversely proportional to the distance between the Fe layer and the external dielectric medium. Finally, we experimentally confirm a twofold increase in the MOSPR sensitivity with respect to the intensity-interrogated SPR biosensor in bulk refractive-index changes, keeping a similar chemical resistance and stability, unprecedented in other MP transducers, and biofunctionalization protocols.

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Identification of the Optimal Spectral Region for Plasmonic and Nanoplasmonic Sensing

Cited by 188 publications

References 28 publications

High-sensitivity integrated devices based on surface plasmon resonance for sensing applications

High-sensitivity integrated devices based on surface plasmon resonance for sensing applications

Handheld high-throughput plasmonic biosensor using computational on-chip imaging

Au/Fe/Au multilayer transducers for magneto-optic surface plasmon resonance sensing

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