Spectroscopic ellipsometric measurements of the dielectric function of germanium dioxide films on crystal germanium

Autor:	J.‐Th. Zettler, S. Chongsawangvirod, E. A. Irene, Y. Z. Hu, Y. Q. Wang
Rok vydání:	1992
Předmět:	Absorbance Crystal Germanium dioxide chemistry.chemical_compound Physics and Astronomy (miscellaneous) chemistry Ellipsometry Analytical chemistry chemistry.chemical_element Germanium Dielectric Photon energy Amorphous solid
Zdroj:	Applied Physics Letters. 61:1098-1100
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.107680
Popis:	From spectroscopic ellipsometry measurements in the 1.5–5.7 eV photon energy range we determined the complex dielectric function of thermally grown germanium dioxide in the 1.0–6.3 eV range. A Kramers–Kronig consistent dispersion formula utilizing an exponential‐shaped optical band edge was used in conjunction with both previously published far ultraviolet absorbance data for amorphous GeO2 and our spectra. These measurements show that e2 for GeO2 can be regarded to be zero in the range of E
Databáze:	OpenAIRE
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