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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 7 — Mar. 1, 1999
  • pp: 1231–1236

Multilayer Coatings with High Reflectance in the Extreme-Ultraviolet Spectral Range of 50 to 121.6 nm

Juan I. Larruquert and Ritva A. M. Keski-Kuha  »View Author Affiliations


Applied Optics, Vol. 38, Issue 7, pp. 1231-1236 (1999)
http://dx.doi.org/10.1364/AO.38.001231


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Abstract

Multilayer coatings with three layers were designed to yield an increase in normal-incidence reflectance in the extreme ultraviolet over that of the available single-layer coatings. Multilayer coatings based on Al, MgF<sub>2</sub>, and either SiC or B<sub>4</sub>C were demonstrated to have higher reflectance than single layers of SiC and B<sub>4</sub>C in the spectral region from 57.9 nm to the H Lyman-α line (121.6 nm) and above. The increase in reflectance was higher at wavelengths close to 121.6 nm. Reflectance degraded slightly over time in the same way as for single layers. After a few months, multilayer coatings maintained higher reflectance than their single-layer counterparts.

© 1999 Optical Society of America

OCIS Codes
(120.5700) Instrumentation, measurement, and metrology : Reflection
(230.4170) Optical devices : Multilayers
(260.7200) Physical optics : Ultraviolet, extreme
(260.7210) Physical optics : Ultraviolet, vacuum
(310.1620) Thin films : Interference coatings
(350.6090) Other areas of optics : Space optics

Citation
Juan I. Larruquert and Ritva A. M. Keski-Kuha, "Multilayer Coatings with High Reflectance in the Extreme-Ultraviolet Spectral Range of 50 to 121.6 nm," Appl. Opt. 38, 1231-1236 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-7-1231

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