Aging and thermal stability of Mg/SiC and Mg/Y2O3 reflection multilayers in the 25-35 nm region

Reflection measurements in the 25-35 nm region were made for Mg/SiC and Mg/Y2O3 multilayers kept in a low-humidity atmosphere for 4 or 5 years. Aged Mg/SiC multilayers keep their reflectances, and the reflectance value at 31.2 nm is 0.44 at 10 degrees of the normal angle of incidence. Aged Mg/Y2O3 m...

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Published in:Applied optics (2004) 2005-09, Vol.44 (26), p.5446-5453
Main Authors: Ejima, Takeo, Yamazaki, Atsushi, Banse, Takanori, Saito, Katsuhiko, Kondo, Yuji, Ichimaru, Satoshi, Takenaka, Hisataka
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container_issue 26
container_start_page 5446
container_title Applied optics (2004)
container_volume 44
creator Ejima, Takeo
Yamazaki, Atsushi
Banse, Takanori
Saito, Katsuhiko
Kondo, Yuji
Ichimaru, Satoshi
Takenaka, Hisataka
description Reflection measurements in the 25-35 nm region were made for Mg/SiC and Mg/Y2O3 multilayers kept in a low-humidity atmosphere for 4 or 5 years. Aged Mg/SiC multilayers keep their reflectances, and the reflectance value at 31.2 nm is 0.44 at 10 degrees of the normal angle of incidence. Aged Mg/Y2O3 multilayers change reflectance as top layer materials, and the best value at 30.1 nm is 0.40 at 10 degrees. Reflection measurements are also made for Mg-based multilayers that are annealed from room temperature to 400 degrees C at 50 degrees C intervals. Both multilayers keep their reflectance at annealing temperatures of 200 degrees C. These results suggest that both Mg-based multilayers can be applied to practical optics.
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title Aging and thermal stability of Mg/SiC and Mg/Y2O3 reflection multilayers in the 25-35 nm region
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