Localized surface plasmon resonance anisotropy in template aligned silver nanoparticles: A case of biaxial metal optics

Ranjan, Mukesh; Bhatnagar, Mukul; Mukherjee, S.

doi:10.1063/1.4914408

Cited by 29 publications

(11 citation statements)

References 48 publications

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“…Image (c) and image (d) show the SEM images of the deposited silver at an AOI of 70 • . It is clearly visible from both the images that the deposited silver nanoparticles grow by the Volmer Weber mode 13 and in the case of the rippled surface, silver nanoparticles follow the topology of the underlying template as previously observed 6,14 . 2 shows a comparison of the observed atomic density of silver on the flat silica surface and the rippled silica surface for an AOI = 70 • .…”

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confidence: 55%

Sub-monolayer growth of Ag on flat and nanorippled SiO2 surfaces

Bhatnagar

Ranjan

Jolley

et al. 2016

Applied Physics Letters

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In-situ Rutherford Backscattering Spectrometry (RBS) and Molecular Dynamics (MD) simulations have been used to investigate the growth dynamics of silver on a flat and the rippled silica surface. The calculated sticking coefficient of silver over a range of incidence angles shows a similar behaviour to the experimental results for an average surface binding energy of a silver adatom of 0.2 eV. This value was used to parameterise the MD model of the cumulative deposition of silver in order to understand the growth mechanisms. Both the model and the RBS results show marginal difference between the atomic concentration of silver on the flat and the rippled silica surface, for the same growth conditions. For oblique incidence, cluster growth occurs mainly on the leading edge of the rippled structure.

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confidence: 55%

Sub-monolayer growth of Ag on flat and nanorippled SiO2 surfaces

Bhatnagar

Ranjan

Jolley

et al. 2016

Applied Physics Letters

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“…The dielectric functions (Right side) are represented with red and blue lines depict the as-prepared and annealed samples, respectively. Adapted with permission from [43]. © 2015 AIP Publishing LLC as-prepared and annealed cases, albeit, ε z exhibits a behaviour similar to bulk-metal along the z-axis.…”

Section: Anisotropic Specimen: Ag-nanoparticle Arrays On Rippled-simentioning

confidence: 99%

Ellipsometry Techniques and Its Advanced Applications in Plasmonics

Saini

Augustine

Sooraj

et al. 2021

Modern Techniques of Spectroscopy

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Ellipsometry is a versatile optical measurement technique which uses polarized light as a probe to characterize various properties of materials viz. film thickness, dielectric functions, uniformity, etc. by detecting the change in the polarization state. In spite of the basic applications, ellipsometry technique is highly used in advanced plasmonic applications like characterization of plasmonic -waveguides, -switches, -tweezers, -circuits, metamaterials, etc. In this chapter, we present the sub-wavelength plasmonic response of Ag and Au nanoparticle-nanowire arrays and nanodot patterns which can be characterized using spectroscopic, generalized, and Mueller matrix ellipsometry modes. In particular, probing local surface plasmon resonance (LSPR), tuning LSPR by varying size, shape, particle number density, or interparticle-gap along or across the nanoparticle arrays, probing ordering of metal nanoparticles along the arrays, detecting in-plane or out-of-plane optical anisotropies, optical modelling of anisotropic systems, directional dielectric functions of anisotropic arrangement of metal nanoparticles, annealing-dependent lost-of-anisotropy are of prime interest. Introduction to Optics and Spectroscopic EllipsometryA branch of physics which deals with the light and sight is called optics. The nature and properties of light including their interaction with matter is studied under optics

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“…Plasmonic optical properties were studied in GLAD deposited indium tin oxide SCTFs decorated with Au nanoparticles using an electroplating process 39 . It was observed that the Au nanoparticles increased the anisotropy of the SCTFs 39,40 . Composites of multiple materials can be achieved, for example, by fabrication of core-shell SCTFs using atomic layer deposition 41 , chemical vapor deposition 42 , or post-growth oxidation 43 .…”

Section: Introductionmentioning

confidence: 99%

Tunable plasmonic resonances in Si-Au slanted columnar heterostructure thin films

Kılıç

Mock

Feder

et al. 2019

Sci Rep

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We report on fabrication of spatially-coherent columnar plasmonic nanostructure superlattice-type thin films with high porosity and strong optical anisotropy using glancing angle deposition. Subsequent and repeated depositions of silicon and gold lead to nanometer-dimension subcolumns with controlled lengths. We perform generalized spectroscopic ellipsometry measurements and finite element method computations to elucidate the strongly anisotropic optical properties of the highly-porous Si-Au slanted columnar heterostructures. The occurrence of a strongly localized plasmonic mode with displacement pattern reminiscent of a dark quadrupole mode is observed in the vicinity of the gold subcolumns. We demonstrate tuning of this quadrupole-like mode frequency within the near-infrared spectral range by varying the geometry of Si-Au slanted columnar heterostructures. In addition, coupled-plasmon-like and inter-band transition-like modes occur in the visible and ultra-violet spectral regions, respectively. We elucidate an example for the potential use of Si-Au slanted columnar heterostructures as a highly porous plasmonic sensor with optical read out sensitivity to few parts-per-million solvent levels in water.

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Localized surface plasmon resonance anisotropy in template aligned silver nanoparticles: A case of biaxial metal optics

Cited by 29 publications

References 48 publications

Sub-monolayer growth of Ag on flat and nanorippled SiO2 surfaces

Sub-monolayer growth of Ag on flat and nanorippled SiO2 surfaces

Ellipsometry Techniques and Its Advanced Applications in Plasmonics

Tunable plasmonic resonances in Si-Au slanted columnar heterostructure thin films

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