Finding the Wedge-Shaped Au Nanoclusters at the Surface of GaAs and Investigating Them with the Polarization Spectroscopy of Plasmons

Using high-temperature annealing of thin gold nanofilms deposited onto the (001) surface of doped p -GaAs crystal with an ultrathin oxide layer, the nanoclusters of gold (Au 2 Ga alloy) are fabricated. The gold clusters have the wedge shapes with rectangular bases elongated in [110] direction at GaA...

Full description

Saved in:
Bibliographic Details
Published in:Semiconductors (Woodbury, N.Y.) N.Y.), 2024-04, Vol.58 (4), p.295-301
Main Authors: Berkovits, V. L., Kosobukin, V. A., Ulin, V. P., Alekseev, P. A., Soldatenkov, F. Yu, Nashchekin, A. V., Khakhulin, S. A., Komkov, O. S.
Format: Article
Language:English
Subjects:
Anisotropy
Clusters
Crystallography
Elongated structure
Gallium arsenide
Gold
High temperature
Infrared reflection
Infrared spectroscopy
Light reflection
Magnetic Materials
Magnetism
Nanoclusters
Near infrared radiation
Physics
Physics and Astronomy
Plasmons
Polarization
Polarized light
Reflectance anisotropy spectroscopy
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Using high-temperature annealing of thin gold nanofilms deposited onto the (001) surface of doped p -GaAs crystal with an ultrathin oxide layer, the nanoclusters of gold (Au 2 Ga alloy) are fabricated. The gold clusters have the wedge shapes with rectangular bases elongated in [110] direction at GaAs(001) surface. This assertion is confirmed by the data of diagnostics of Au/ p -GaAs(001) structures. Anisotropic plasmons localized on equally oriented wedge-shaped Au (Au 2 Ga) clusters are investigated with the optical reflectance anisotropy spectroscopy and spectroscopy of polarized light reflection. It is shown that the spectral peak at the energy about 0.9 eV in the near infrared range is associated with plasmons polarized along the longest sides of clusters in crystallographic direction [110]. Another peak—at the energy of 1.8 eV—is due to plasmons having polarization in direction .
ISSN:1063-7826
1090-6479
DOI:10.1134/S106378262404002X