Reversible and irreversible control of optical properties of porous silicon superlattices by thermal oxidation, vapor adsorption, and liquid penetration

被引:30
作者
Zangooie, S [1 ]
Jansson, R [1 ]
Arwin, H [1 ]
机构
[1] Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden
来源
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A | 1998年 / 16卷 / 05期
关键词
D O I
10.1116/1.581438
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Optical properties of porous silicon superlattices are investigated using variable angle spectroscopic ellipsometry. Different phenomena such as in-depth inhomogeneities and interface transition regions are resolved and studied using various optical models. The optical properties of the samples are modified irreversibly by thermal oxidation yielding a blueshift of the reflectance. A reversible redshift of the spectra is obtained by vapor adsorption and liquid penetration into the superlattice. Moreover, existence of different specific internal surface areas and pore size distributions in the low and high index sublayers of the material is proposed. (C) 1998 American Vacuum Society. [S0734-2101(98)02505-6].
引用
收藏
页码:2901 / 2912
页数:12
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