|
[摘要]:Reflection anisotropy spectroscopy (RAS) and spectroscopic ellipsometry (SE) have extensively been applied to inorganic and organic structures and, because of the similarity of these two techniques, the evaluation procedure of RA spectra can be performed in a similar way as for SE. Especially for thin films, RA spectra are often strongly enhanced in the spectral region where optical interference occurs and the superposition of interference features can lead to an incorrect interpretation of RA spectra. By simulation of the origin of each RAS feature it is possible to distinguish interference from true film anisotropy. Also, the effect of surface roughness on the RA spectra is discussed. (C) 2012 American Vacuum Society. [DOI: 10.1116/1.3677823] |
|