Details
| Original language | English |
|---|---|
| Pages | 44-50 |
| Number of pages | 7 |
| Publication status | Published - 1993 |
| Event | 36th Annual Technical Conference - Dallas, TX, USA Duration: 25 Apr 1993 → 30 Apr 1993 |
Conference
| Conference | 36th Annual Technical Conference |
|---|---|
| City | Dallas, TX, USA |
| Period | 25 Apr 1993 → 30 Apr 1993 |
Abstract
The deposition of high-reflecting dielectric coatings for the VUV spectral range requires the use of fluoride materials because oxide layers show strong absorption at wavelengths below 200 nm. As shown in a previous paper, the reflectances of fluoride mirrors deposited conventionally are limited by volume and interface scattering attributed to the polycrystalline microstructure of the layers; reduced scattering was observed in layers deposited by IAD or IBS. In these processes, oxygen was used as reactive gas in order to eliminate the stoichiometric defects of the condensed layer material which were attributed to fluorine deficiencies caused by preferential sputtering during deposition. The resulting oxide content in the layers, however, leaded to strong absorption losses at wavelengths below 200 nm. To obtain layers with improved stoichiometry by using IAD or IBS, these processes were performed with fluorine as reactive gas. Single layers and high-reflecting quarterwave stacks were deposited and investigated. Their optical properties are compared to data obtained for conventionally deposited coatings and for coatings deposited by IAD or IBS using oxygen as reactive gas. The results indicate that the ion processes are promising tools for the deposition of low-loss dielectric UV/VUV mirrors.
ASJC Scopus subject areas
- Engineering(all)
- Mechanical Engineering
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Chemical Engineering(all)
- Fluid Flow and Transfer Processes
- Materials Science(all)
- Surfaces, Coatings and Films
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1993. 44-50 Paper presented at 36th Annual Technical Conference, Dallas, TX, USA.
Research output: Contribution to conference › Paper › Research › peer review
}
TY - CONF
T1 - Optical losses of fluoride coatings for UV/VUV applications deposited by reactive IAD and IBS processes
AU - Kolbe, Jürgen
AU - Schink, Harald
AU - Ristau, Detlev
PY - 1993
Y1 - 1993
N2 - The deposition of high-reflecting dielectric coatings for the VUV spectral range requires the use of fluoride materials because oxide layers show strong absorption at wavelengths below 200 nm. As shown in a previous paper, the reflectances of fluoride mirrors deposited conventionally are limited by volume and interface scattering attributed to the polycrystalline microstructure of the layers; reduced scattering was observed in layers deposited by IAD or IBS. In these processes, oxygen was used as reactive gas in order to eliminate the stoichiometric defects of the condensed layer material which were attributed to fluorine deficiencies caused by preferential sputtering during deposition. The resulting oxide content in the layers, however, leaded to strong absorption losses at wavelengths below 200 nm. To obtain layers with improved stoichiometry by using IAD or IBS, these processes were performed with fluorine as reactive gas. Single layers and high-reflecting quarterwave stacks were deposited and investigated. Their optical properties are compared to data obtained for conventionally deposited coatings and for coatings deposited by IAD or IBS using oxygen as reactive gas. The results indicate that the ion processes are promising tools for the deposition of low-loss dielectric UV/VUV mirrors.
AB - The deposition of high-reflecting dielectric coatings for the VUV spectral range requires the use of fluoride materials because oxide layers show strong absorption at wavelengths below 200 nm. As shown in a previous paper, the reflectances of fluoride mirrors deposited conventionally are limited by volume and interface scattering attributed to the polycrystalline microstructure of the layers; reduced scattering was observed in layers deposited by IAD or IBS. In these processes, oxygen was used as reactive gas in order to eliminate the stoichiometric defects of the condensed layer material which were attributed to fluorine deficiencies caused by preferential sputtering during deposition. The resulting oxide content in the layers, however, leaded to strong absorption losses at wavelengths below 200 nm. To obtain layers with improved stoichiometry by using IAD or IBS, these processes were performed with fluorine as reactive gas. Single layers and high-reflecting quarterwave stacks were deposited and investigated. Their optical properties are compared to data obtained for conventionally deposited coatings and for coatings deposited by IAD or IBS using oxygen as reactive gas. The results indicate that the ion processes are promising tools for the deposition of low-loss dielectric UV/VUV mirrors.
UR - http://www.scopus.com/inward/record.url?scp=0027796790&partnerID=8YFLogxK
M3 - Paper
AN - SCOPUS:0027796790
SP - 44
EP - 50
T2 - 36th Annual Technical Conference
Y2 - 25 April 1993 through 30 April 1993
ER -