| OHLÍDAL, Ivan, Daniel FRANTA and David NEČAS. Ellipsometric and reflectometric characterization of thin films exhibiting thickness non-uniformity and boundary roughness. Applied Surface Science. AMSTERDAM, NETHERLANDS: Elsevier Science BV, 2017, vol. 421, November, p. 687-696. ISSN 0169-4332. Available from: https://dx.doi.org/10.1016/j.apsusc.2016.10.186. |
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@article{1409184,
author = {Ohlídal, Ivan and Franta, Daniel and Nečas, David},
article_location = {AMSTERDAM, NETHERLANDS},
article_number = {November},
doi = {http://dx.doi.org/10.1016/j.apsusc.2016.10.186},
keywords = {Optical constants;Ellipsometry;Spectrophotometry;Thin films;Roughness;Non-uniformity},
language = {eng},
issn = {0169-4332},
journal = {Applied Surface Science},
title = {Ellipsometric and reflectometric characterization of thin films exhibiting thickness non-uniformity and boundary roughness},
url = {https://www.sciencedirect.com/science/article/pii/S0169433216323224},
volume = {421},
year = {2017}
}
TY - JOUR
ID - 1409184
AU - Ohlídal, Ivan - Franta, Daniel - Nečas, David
PY - 2017
TI - Ellipsometric and reflectometric characterization of thin films exhibiting thickness non-uniformity and boundary roughness
JF - Applied Surface Science
VL - 421
IS - November
SP - 687-696
EP - 687-696
PB - Elsevier Science BV
SN - 01694332
KW - Optical constants;Ellipsometry;Spectrophotometry;Thin films;Roughness;Non-uniformity
UR - https://www.sciencedirect.com/science/article/pii/S0169433216323224
N2 - In this paper epitaxial ZnSe thin films prepared by molecular beam epitaxy onto GaAs single crystal substrates exhibiting two defects, i.e. boundary roughness and thickness non-uniformity, are optically characterized using a combination of spectroscopic ellipsometry and near-normal spectroscopic reflectometry. The influence of boundary roughness is included into optical quantity formulae by the combination of the scalar diffraction theory and Rayleigh-Rice theory. Thickness non-uniformity is incorporated by means of averaging the elements of the unnormalized Mueller matrices. The universal dispersion model of the optical constants of the ZnSe thin films based on parametrization of the joint density of electronic states is used. Very thin overalyers modeled by rough thin films with identically rough boundaries are taken into account on the upper boundaries of the ZnSe thin films. The spectral dependencies of the optical constants of the ZnSe thin films are determined within the wide spectral region (0.6–8.7 eV). Moreover, the mean thickness of the ZnSe thin films and thickness of overlayers are determined together with the other structural parameters characterizing the defects. The values of roughness parameters, determined by the optical method, are verified by a comparison with results achieved by atomic force microscopy. It is also shown that approximations of the local reflection coefficients presented are usable for processing the experimental data.
ER -
OHLÍDAL, Ivan, Daniel FRANTA and David NEČAS. Ellipsometric and reflectometric characterization of thin films exhibiting thickness non-uniformity and boundary roughness. \textit{Applied Surface Science}. AMSTERDAM, NETHERLANDS: Elsevier Science BV, 2017, vol.~421, November, p.~687-696. ISSN~0169-4332. Available from: https://dx.doi.org/10.1016/j.apsusc.2016.10.186.
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