Plasmonic nanorod metamaterials for biosensing

Kabashin, Andrei V.; Evans, Paul; Pastkovsky, S.; Hendren, William; Wurtz, Gregory A.; Atkinson, R.; Pollard, Robert; Podolskiy, Viktor A.; Zayats, Anatoly V.

doi:10.1038/nmat2546

Cited by 1,628 publications

(1,290 citation statements)

References 25 publications

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“…Other promises are related to sensing-oriented metamaterials, or artificial materials, composed of nanoelements with nanoscale distance between them, which can provide an improved sensing response or new functionalities. Plasmonic nanorod assembly, presenting a dense "forest" of high aspect ratio gold nanorods oriented perpendicularly to a glass substrate, is a good example of such metamaterial [124]. When illuminated in ATR geometry, such metamaterial is capable of supporting a new guided mode over the nanorod array structure, which is more sensitive compared to surface plasmon polariton or localized plasmon counterparts.…”

Section: Current Trends In the Development Of Phase-sensitive Spr Senmentioning

confidence: 99%

Phase‐sensitive surface plasmon resonance biosensors: methodology, instrumentation and applications

et al. 2012

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International audienceSurface Plasmon Resonance (SPR) has become a central tool for label-free characterization of biomolecular interactions. Based on monitoring of amplitude characteristics, conventional SPR sensors have been extensively explored, commercialized and applied for studies of many important interactions (antigen-antibody, protein-ligand etc), but this technology still lacks of sensitivity for the detection of relatively small and low copy number compounds. Phase-sensitive SPR has recently emerged as an upgrade of this technology to resolve the sensitivity issue. Profiting from a sharp phase jump under SPR and ultra-sensitive tools of its control, this technology offers up to 100-time improvement of the detection limit, giving access to the detection of trace amounts of small molecular weight analytes (drugs etc). This paper intends to provide a tutorial on basic concepts of phase detection in SPR sensing, compare the performance of phase- and amplitude-sensitive sensors, review recent progress in the development and applications of phase-sensitive SPR sensors, and outline future prospects and trends of this technology

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Section: Current Trends In the Development Of Phase-sensitive Spr Senmentioning

confidence: 99%

Phase‐sensitive surface plasmon resonance biosensors: methodology, instrumentation and applications

et al. 2012

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“…46 In contrast to the localized surface plasmons studied here, for pure metallic NWs, propagating surface plasmons with a guided character can also result in highsensitivity bio-sensing. 47 Furthermore, we are only using the classical electromagnetic theory for the calculation and interpretation of results; quantum mechanical effects or chemical enhancement effects have not been considered. 48,49 However, under a uniform basis and assumptions, the main outcome and the trends of the results would remain unaffected.…”

Section: For Experimental Verification Of the Fdtd Resultsmentioning

confidence: 99%

Plasmon management in index engineered 2.5D hybrid nanostructures for surface-enhanced Raman scattering

Huang¹,

Chen

et al. 2014

NPG Asia Mater

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Leaky mode resonance (LMR) and optical standing waves (SWs) generated in suitably illuminated vertically aligned supported nanowires (NWs) were demonstrated to enhance the plasmonic electric (E) field behavior of silver nanoparticles (AgNPs) dispersed on the wires. The combination of LMR and SW can significantly enhance the local plasmonic E field around highdensity AgNPs. The results of the finite difference time domain (FDTD) calculations were experimentally verified by comparing the surface-enhanced Raman scattering (SERS) sensitivity, which is directly dependent on the E field, in AgNP-coated silicon, germanium and silver NWs. As LMR and SW are functions of the substrate optical index (n, k), an engineering of the indices predicted a (3.88, 0) theoretical value to maximize the plasmonic E-field on the hybrid scaffold at a given AgNP density. These SERS substrates were utilized for the detection of marine toxins, L-BMAA (2-amino-3-(methylamino) propionic acid hydrochloride) and Malachite green, which are used extensively in seafood. AgNP-decorated silicon NWs, whose index (3.88, 0.02) lies close to the theoretically predicted value, exhibit at least pico-molar sensitivity toward those marine toxins. A plasmon management strategy is developed that could assist in lowering the detection level of environmental toxins by SERS. NPG Asia Materials (2014) 6, e123; doi:10.1038/am.2014.67; published online 12 September 2014 INTRODUCTIONThe involvement of plasmonics 1 in applications such as biosensing 2 through surface-enhanced Raman scattering (SERS), energy, 3 photodetectors 4 and lasers, 5 among others, is extensive because surface plasmons can concentrate and manipulate light energy on scales lower than their diffraction limit. 6 The common goal has generally been to be able to intensify and control the plasmonic electric (E) fields in preferred locations within the material. For example, the so-called 'hot-spots' in SERS, for molecular sensing, are reportedly the regions of extraordinarily intense E field at the junctions of critically close gold (Au) or silver (Ag) nanoparticles (NPs). The interparticle spacing 7 and fractal-like aggregations 8 within the metal NPs were observed to be more critical for the E enhancement than the basic material properties or the size of the NPs.The recent observation of enhanced optical absorption in suitably illuminated semiconductor nanowires (NWs) via leaky mode resonances (LMRs) 9 opens up the possibility of using LMR for the E-field enhancement of metal NPs. In addition, researchers have observed optical standing waves (SWs) along the length of the NWs when studying optically illuminated vertically aligned NW structures grown on a substrate by finite difference time domain (FDTD) calculations. However, the effect of the SWs or the LMR in modulating the total effective E field has been ignored or addressed inadequately. The fact that Ag-or AuNP-dispersed vertically aligned 1D NW/nanorods 10

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“…Consequently, one can introduce figure of merit (FOM) which is the sensitivity divided by the full width at half maximum of the sensitive resonance. For our device, the ≈ − FOM 233 RIU 1 , while for state-of-the-art sensors it is 330 RIU −1 [26] and 590 RIU −1 [27]. Sensitivity and the FOM values of our device can be even better if we consider the analyte half-space instead of 50 nm layer.…”

Section: The Refractive Index Sensor Based On a Dielectric Photonic Cmentioning

confidence: 89%

“…From the least-squares linear approximation, the wavelength sensitivity of this device can be estimated as / ≈ λ S 10.75 nm RIU, which is relatively low value compared to analogous devises. Sensitivity of state-of-the art plasmonic sensors [26,27] is about 30 000 nm RIU / . However, the detection limit of such devices is related to the width of the resonance, and the plasmonic resonance usually has the width of about 50-100 nm.…”

Section: The Refractive Index Sensor Based On a Dielectric Photonic Cmentioning

confidence: 99%

Fano resonances in a photonic crystal covered with a perforated gold film and its application to bio-sensing

Klimov

Pavlov

Treshin

et al. 2017

J. Phys. D: Appl. Phys.

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IntroductionThe optical Tamm state, which can occur either on the boundary of two photonic crystals [1,2] or on the boundary of a photonic crystal and a metal film [3][4][5][6][7][8][9][10][11][12], has recently attracted attention of researchers in nano-optics community. The optical Tamm state in a system with a photonic crystal covered with a metal film is especially interesting because it allows one to combine its complicated physics with the rich physics of plasmon surface waves. Since the first experimental demonstration [3], the optical Tamm state is an object of numerous researches. In particular, interaction of the Tamm state and a surface plasmon wave has been already shown [4,5]. Besides, the scheme of a sensor which is sensitive to the change of a refractive index based on the optical Tamm state has been offered [6,7]. Recently, in a system consisting of a photonic crystal and a perforated metal film, effects of the extraordinary transmission of light and huge asymmetry of transmission related to the optical Tamm state have been discovered [8,9]. The optical Tamm state has been investigated in the presence of nonlinear effects, particularly as a lasing mode of the nanolaser [10], it has been used to enhance the second harmonic generation [11] and to control spontaneous radiation of quantum emitters [12].In this work, we investigate another effect associated with the optical Tamm state. The photonic crystal necessary to observe an optical Tamm resonance supports the propagation of a set of waveguide modes. In this paper, we show that it is possible to achieve an interaction between the waveguide modes of the photonic crystal and the Tamm state with the help of a periodic lattice of slits in a metal film. We show that this interaction results in the Fano resonance, which is a typical sign of the interaction of high-quality dark and lowquality bright modes. In spite of the fact that the research of Fano resonance in photonic and plasmonic structures is a hot topic now [13-18], we do not know any investigation devoted AbstractOptical properties of the photonic crystal covered with a perforated metal film were investigated and the existence of the Fano-type resonances was shown. The Fano resonances originate from the interaction between the optical Tamm state and the waveguide modes of the photonic crystal. It manifests itself as a narrow dip in a broad peak in the transmission spectrum related to the optical Tamm state. The design of a sensor based on this Fano resonance that is sensitive to the change of the environment refractive index is suggested.

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Plasmonic nanorod metamaterials for biosensing

Cited by 1,628 publications

References 25 publications

Phase‐sensitive surface plasmon resonance biosensors: methodology, instrumentation and applications

Phase‐sensitive surface plasmon resonance biosensors: methodology, instrumentation and applications

Plasmon management in index engineered 2.5D hybrid nanostructures for surface-enhanced Raman scattering

Fano resonances in a photonic crystal covered with a perforated gold film and its application to bio-sensing

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