Dissimilar gold nanoclusters at GaAs(0 0 1) surface: Formation chemistry, structure, and localized plasmons

Berkovits, V. L.; Kosobukin, V. A.; Ulin, V. P.; Soldatenkov, F. Yu.; Макаренко, И. В.; Левицкий, В. С.; Нащекин, А. В.; Alekseev, P. A.

doi:10.1016/j.apsusc.2019.144982

Cited by 8 publications

(10 citation statements)

References 27 publications

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“…Having the optical model, we interpret the linearly polarized reflectivity spectra. At normal incidence of α ‐polarized light wave onto an in‐plane isotropic dielectric multilayer with a random monolayer of polarizable spheroids we find the polarized reflection spectrum as [ 8,28,29 ]

R_{α} (ω) \equiv R^{0} + Δ R_{α} = {| r^{0} + \frac{μ}{λ S} \sum_{n} χ_{n}^{(α)} false(ω false) |}^{2}

where

R^{0}

is the Fresnel‐type reflectivity of the background continuous‐medium multilayer without clusters [ 8 ] and with a spectrum like 1 shown in Figure 4. The term

Δ R_{α}

stands for the averaged cluster‐conditioned contribution whose spectral fingerprint appears in Figure 4b.…”

Section: Theoretical Interpretationmentioning

confidence: 99%

“…[ 1–4 ] A few experimental and theoretical papers can be referred to in the context of our work devoted to anisotropic plasmons of on‐surface clusters in semiconductor‐metal nanostructures. In brief, we mention the studies of anisotropic nanoclusters of indium, [ 5,6 ] gold, [ 7,8 ] silver, [ 7,9–11 ] etc., on surfaces of InAs, [ 6 ] GaAs, [ 5,8 ] as well as on transparent substrates. [ 7,9–11 ] In some structures the anisotropy of metal cluster arrays and their plasmons is preset by the prepared anisotropic surface of substrate.…”

Section: Introductionmentioning

confidence: 99%

“…To make a progress in solving the problem, we apply a recently proposed technology for preparing nanoclusters of gold on chemically nitridized GaAs(001) surface. [ 8 ] The chemical nitridation procedure differs principally from the conventional plasma‐activated or thermo‐activated nitridations, [ 14,15 ] which result in formation of thick amorphous layers consisting of nitrides with participating Ga and As atoms. To add, the work, [ 8 ] first proposed to use nitridized GaAs surfaces for creating metal nanoclusters, has dealt with Au clusters possessing surface‐normal anisotropy typical of imperfect (with holes) nitridized surfaces.…”

Section: Introductionmentioning

confidence: 99%

“…[ 8 ] The chemical nitridation procedure differs principally from the conventional plasma‐activated or thermo‐activated nitridations, [ 14,15 ] which result in formation of thick amorphous layers consisting of nitrides with participating Ga and As atoms. To add, the work, [ 8 ] first proposed to use nitridized GaAs surfaces for creating metal nanoclusters, has dealt with Au clusters possessing surface‐normal anisotropy typical of imperfect (with holes) nitridized surfaces. As opposed to work, [ 8 ] this paper describes the fabrication and optical study of Au nanoclusters with strong in‐surface anisotropy realizable on very perfect nitridized GaAs surfaces.…”

Section: Introductionmentioning

confidence: 99%

“…To add, the work, [ 8 ] first proposed to use nitridized GaAs surfaces for creating metal nanoclusters, has dealt with Au clusters possessing surface‐normal anisotropy typical of imperfect (with holes) nitridized surfaces. As opposed to work, [ 8 ] this paper describes the fabrication and optical study of Au nanoclusters with strong in‐surface anisotropy realizable on very perfect nitridized GaAs surfaces.…”

Section: Introductionmentioning

confidence: 99%

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Polarization Spectroscopy of Anisotropic Plasmons in Self‐Oriented Nanoclusters of Gold on Monolayer of Nitrogen Atoms Chemisorbed at GaAs(001) Surface

Berkovits

Kosobukin

Ulin

et al. 2021

Physica Status Solidi (b)

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Herein, the formation of Au nanoclusters on nitridized GaAs(001) surface is described, as well as the structure diagnostics and spectroscopic studies which reveal a strong anisotropy of the plasmons localized on the clusters. Principal aspects of the work are the following. Technologically, structures of Au/N/GaAs are fabricated with a monolayer of nitrogen atoms chemisorbed preliminary onto GaAs substrate to prevent its reaction with subsequently deposited Au film. Annealing of the structures Au/N/GaAs results in the appearance of anisotropic nanoclusters of chemically clean gold on GaAs surface. Experimentally, the existence of in‐surface anisotropy of Au clusters is verified with the atomic force microscopy and it is investigated with the resonant optical spectroscopies of anisotropy reflectance and polarized reflection. All the methods are applied jointly for the detailed study of anisotropic plasmons revealed in gold nanocluster arrays. Theoretically, the plasmon‐conditioned features observed in optical polarized spectra are interpreted using an optical model of in‐surface anisotropic plasmons in Au nanospheroids. As a result, the macroscopic anisotropy and orientation of gold nanoclusters and their plasmons relative to the crystallographic axes of GaAs substrate are unambiguously established and reliably specified.

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R_{α} (ω) \equiv R^{0} + Δ R_{α} = {| r^{0} + \frac{μ}{λ S} \sum_{n} χ_{n}^{(α)} false(ω false) |}^{2}

where

R^{0}

is the Fresnel‐type reflectivity of the background continuous‐medium multilayer without clusters [ 8 ] and with a spectrum like 1 shown in Figure 4. The term

Δ R_{α}

stands for the averaged cluster‐conditioned contribution whose spectral fingerprint appears in Figure 4b.…”

Section: Theoretical Interpretationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Polarization Spectroscopy of Anisotropic Plasmons in Self‐Oriented Nanoclusters of Gold on Monolayer of Nitrogen Atoms Chemisorbed at GaAs(001) Surface

Berkovits

Kosobukin

Ulin

et al. 2021

Physica Status Solidi (b)

View full text Add to dashboard Cite

show abstract

Creation and plasmon anisotropy spectroscopy of wedge-shaped gold nanoclusters conditioned by GaAs(001) surface

Berkovits,

Kosobukin,

Ulin

et al. 2024

Surface Science

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Anisotropic plasmons in Au/GaAs(001) structures with gold nanoclusters

Berkovits

Kosobukin

Ulin

et al. 2020

J. Phys.: Conf. Ser.

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The structures Au/GaAs(001) with gold nanoclusters are created by annealing of Au films deposited onto GaAs surface. The samples are diagnosed stepwise by scanning probe microscopy. Using reflectance anisotropy spectroscopy, Au clusters are established to possess plasmons with the in-surface anisotropy. The measured anisotropy spectrum consists of a resonant feature near the energy of 2 eV typical of local plasmons of Au clusters. The results are explained theoretically, and the new spectral feature is assigned to anisotropic plasmons of Au nanoclusters located on GaAs surface.

show abstract

Dissimilar gold nanoclusters at GaAs(0 0 1) surface: Formation chemistry, structure, and localized plasmons

Cited by 8 publications

References 27 publications

Polarization Spectroscopy of Anisotropic Plasmons in Self‐Oriented Nanoclusters of Gold on Monolayer of Nitrogen Atoms Chemisorbed at GaAs(001) Surface

Polarization Spectroscopy of Anisotropic Plasmons in Self‐Oriented Nanoclusters of Gold on Monolayer of Nitrogen Atoms Chemisorbed at GaAs(001) Surface

Creation and plasmon anisotropy spectroscopy of wedge-shaped gold nanoclusters conditioned by GaAs(001) surface

Anisotropic plasmons in Au/GaAs(001) structures with gold nanoclusters

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