Double-layered nanoparticle stacks for spectro-electrochemical applications

Frank, P.; Srajer, Johannes; Schwaighofer, Andreas; Kibrom, Asmorom; Nowak, Christoph

doi:10.1364/ol.37.003603

Cited by 7 publications

(8 citation statements)

References 14 publications

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“…Frank et al 279 presented a nanostructure based on double-layered NP stacks suitable for spectra-electrochemical applications. Their structure was based on a continuous gold layer upon which periodic arrays of tantalum pentoxide (Ta 2 O 5 ) nanodisks were formed.…”

Section: Miscellaneous: Applications Of Slrs In Biosensing/biorecognimentioning

confidence: 99%

Plasmonic Surface Lattice Resonances: A Review of Properties and Applications

et al. 2018

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When metal nanoparticles are arranged in an ordered array, they may scatter light to produce diffracted waves. If one of the diffracted waves then propagates in the plane of the array, it may couple the localized plasmon resonances associated with individual nanoparticles together, leading to an exciting phenomenon, the drastic narrowing of plasmon resonances, down to 1–2 nm in spectral width. This presents a dramatic improvement compared to a typical single particle resonance line width of >80 nm. The very high quality factors of these diffractively coupled plasmon resonances, often referred to as plasmonic surface lattice resonances, and related effects have made this topic a very active and exciting field for fundamental research, and increasingly, these resonances have been investigated for their potential in the development of practical devices for communications, optoelectronics, photovoltaics, data storage, biosensing, and other applications. In the present review article, we describe the basic physical principles and properties of plasmonic surface lattice resonances: the width and quality of the resonances, singularities of the light phase, electric field enhancement, etc. We pay special attention to the conditions of their excitation in different experimental architectures by considering the following: in-plane and out-of-plane polarizations of the incident light, symmetric and asymmetric optical (refractive index) environments, the presence of substrate conductivity, and the presence of an active or magnetic medium. Finally, we review recent progress in applications of plasmonic surface lattice resonances in various fields.

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Section: Miscellaneous: Applications Of Slrs In Biosensing/biorecognimentioning

confidence: 99%

Plasmonic Surface Lattice Resonances: A Review of Properties and Applications

et al. 2018

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“…Most recent sensing techniques utilize surface enhancement of plasmon excitations induced on metal nanostructures like Raman scattering, refractive index sensing, fluorescence-and infrared spectroscopy [5][6][7][8][9][10][11]. One of the most widely studied types of nanostructures is twodimensional gratings of metal nanoparticles arranged on top of a dielectric spacer layer and a supporting metal film [12][13][14][15]. This kind of nanostructure provides a very high grade of reproducibility and pronounced plasmon excitations that lead to ultra-high enhancement factors [5,16].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Localized Surface Plasmon Mode Hybridization in the Near and Mid Infrared

et al. 2014

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We investigate plasmon excitations within a regular grating of double layered gold/insulator nanoparticles in the infrared and visible spectral region. Provided a flat gold film as substrate, strong coupling between the localized surface plasmon modes and their image like excitations in the metal is observed. The interaction results in a strong red shift of the plasmon mode as well as the splitting of the modes into levels of different angular momenta, often referred to as plasmon hybridization. The diameters of the nanoparticles are designed in a way that the splitting of the resonances occurs in the spectral region between 0.1 to 1 eV, thus being accessible using an infrared microscope. Moreover, we investigated the infrared absorption signal of gratings that contain two differently sized nanoparticles. The interaction between two autonomous localized surface plasmon excitations is investigated by analyzing their crossing behavior. In contrast to the interaction between localized surface plasmons and propagating plasmon excitations which results in pronounced anticrossing, the presented structures show no interaction between two autonomous localized surface plasmons. Finally, plasmon excitations of the nanostructured surfaces in the visible spectral region are demonstrated through photographs acquired at three different illumination angles. The change in color of the gratings demonstrates the complex interaction between propagating and localized surface plasmon modes.

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“…The top-down lithographic process used to create the disk-stack nanostructure has been reported previously. 31 The regular arranged disk-stack pattern was defined by electron beam (e-beam) exposure of a negative ebeam resist. After removal of the unexposed parts of the resist, the stack-array structure was created by ion-beam etching.…”

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confidence: 99%

Double-layered nanoparticle stacks for surface enhanced infrared absorption spectroscopy

et al. 2014

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We demonstrate that double-layered stacks of gold and insulator nanoparticles arranged on a flat gold surface dramatically enhance the sensitivity in absorption infrared microscopy. Through morphological variations of the nanoparticles, the frequency of the plasmon resonances can be tuned to match the frequency of the molecular vibration in the mid-infrared region. The results show that the nanostructures enhance the absorption signal of the molecules by a factor of up to ~2.2 × 10(6), while preserving their characteristic line-shape remarkably well.

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Double-layered nanoparticle stacks for spectro-electrochemical applications

Cited by 7 publications

References 14 publications

Plasmonic Surface Lattice Resonances: A Review of Properties and Applications

Plasmonic Surface Lattice Resonances: A Review of Properties and Applications

Experimental Study on Localized Surface Plasmon Mode Hybridization in the Near and Mid Infrared

Double-layered nanoparticle stacks for surface enhanced infrared absorption spectroscopy

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