Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/25050
Title: Optical and microstructural properties of MgF2 UV coatings grown by ion beam sputtering process
Author: Quesnel, Etienne
Dumas, L.
Jacob, D.
Peiró Martínez, Francisca
Keywords: Propietats òptiques
Revestiments
Microscòpia electrònica
Fluorurs
Pel·lícules fines
Làsers
Optical properties
Coatings
Electron microscopy
Fluorides
Thin films
Lasers
Issue Date: Nov-2000
Publisher: American Institute of Physics
Abstract: The optical, mechanical, and microstructural properties of MgF2 single layers grown by ion beam sputtering have been investigated by spectrophotometric measurements, film stress characterization, x-ray photoelectron spectroscopy (XPS), x-ray diffraction, and transmission electron microscopy. The deposition conditions, using fluorine reactive gas or not, have been found to greatly influence the optical absorption and the stress of the films as well as their microstructure. The layers grown with fluorine compensation exhibit a regular columnar microstructure and an UV-optical absorption which can be very low, either as deposited or after thermal annealings at very low temperatures. On the contrary, layers grown without fluorine compensation exhibit a less regular microstructure and a high ultraviolet absorption which is particularly hard to cure. On the basis of calculations, it is shown that F centers are responsible for this absorption, whereas all the films were found to be stoichiometric, in the limit of the XPS sensitivity. On the basis of external data taken from literature, our experimental curves are analyzed, so we propose possible diffusion mechanisms which could explain the behaviors of the coatings.
Note: Reproducció del document publicat a: http://dx.doi.org/10.1116/1.1290374
It is part of: Journal of Vacuum Science Technology A-Vacuum Surfaces and Films, 2000, vol. 18, p. 2869-2876
Related resource: http://dx.doi.org/10.1116/1.1290374
URI: http://hdl.handle.net/2445/25050
ISSN: 0021-8979
Appears in Collections:Articles publicats en revistes (Electrònica)

Files in This Item:
File Description SizeFormat 
189698.pdf375.32 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.