Optical response of Ag-induced reconstructions on vicinal Si(111)

被引：3
|
作者：
Chandola, S [1 ]
Jacob, J [1 ]
Fleischer, K [1 ]
Vogt, P [1 ]
Richter, W [1 ]
McGilp, JF [1 ]
机构：
[1] Tech Univ Berlin, Inst Festkorperphys, D-10623 Berlin, Germany
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2005年 / 242卷 / 15期
关键词：
D O I：
10.1002/pssb.200562214
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The optical response of the Si(I 11)-(3 x l)-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(I 11) substrate at 870 K. A significant optical anisotropy develops around 2.2 eV which is related to the formation of the 3 x I structure. This surface was then used as a template to grow one-dimensional (ID) 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 I eV, which may be linked to a difference in the metallic character of the nanodots and islands. (c) 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
引用
收藏
页码：3017 / 3021
页数：5
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