Premium
Optical response of Ag‐induced reconstructions on vicinal Si(111)
Author(s) -
Chandola S.,
Jacob J.,
Fleischer K.,
Vogt P.,
Richter W.,
McGilp J. F.
Publication year - 2005
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200562214
Subject(s) - vicinal , nanodot , anisotropy , substrate (aquarium) , metal , materials science , spectroscopy , optical anisotropy , spectral line , crystallography , chemistry , condensed matter physics , analytical chemistry (journal) , optics , nanotechnology , physics , metallurgy , geology , oceanography , organic chemistry , chromatography , quantum mechanics , astronomy
The optical response of the Si(111)‐(3 × 1)–Ag surface has been studied for the first time with reflectance anisotropy spectroscopy (RAS). A single domain surface was obtained by depositing <1 ML of Ag onto a vicinal Si(111) substrate at 870 K. A significant optical anisotropy develops around 2.2 eV which is related to the formation of the 3 × 1 structure. This surface was then used as a template to grow one‐dimensional (1D) arrays of Ag nanodots, and also 3D Ag islands, by depositing 0.5 ML, and higher, coverages of Ag at room temperature. RAS of these structures showed a different response in the 2.2 eV region, with a broadened and reduced anisotropy. By extending the RA spectra into the infra‐red region (0.5–1.5 eV), substantial differences between the structures were observed below 1 eV, which may be linked to a difference in the metallic character of the nanodots and islands. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)