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Spontaneous and artificial direct nanostructuring of solid surface by extreme ultraviolet laser with nanosecond pulses

Published online by Cambridge University Press:  13 November 2015

K. Kolacek ,
J. Schmidt ,
J. Straus ,
O. Frolov ,
V. Prukner ,
R. Melich  and
P. Psota
K. Kolacek*
Affiliation:
Institute of Plasma Physics, AS CR, v.v.i., Za Slovankou 1782/3, 182 00 Praha 8, Czech Republic
J. Schmidt
Affiliation:
Institute of Plasma Physics, AS CR, v.v.i., Za Slovankou 1782/3, 182 00 Praha 8, Czech Republic
J. Straus
Affiliation:
Institute of Plasma Physics, AS CR, v.v.i., Za Slovankou 1782/3, 182 00 Praha 8, Czech Republic
O. Frolov
Affiliation:
Institute of Plasma Physics, AS CR, v.v.i., Za Slovankou 1782/3, 182 00 Praha 8, Czech Republic
V. Prukner
Affiliation:
Institute of Plasma Physics, AS CR, v.v.i., Za Slovankou 1782/3, 182 00 Praha 8, Czech Republic
R. Melich
Affiliation:
Institute of Plasma Physics, AS CR, v.v.i., Za Slovankou 1782/3, 182 00 Praha 8, Czech Republic
P. Psota
Affiliation:
Institute of Plasma Physics, AS CR, v.v.i., Za Slovankou 1782/3, 182 00 Praha 8, Czech Republic
*
Address correspondence and reprint requests to: K. Kolacek, Email: [email protected]
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Abstract

Nanostructuring can be either spontaneously appearing (such as laser-induced periodic surface structures, and diffraction patterns – for example, in windows of grid proximity-standing at the ablated target-surface) or artificially created (like – as we hoped – interference patterns) that can be in some extend controlled. Due to that a new interferometer (belonging to wave-front division category) with two aspheric mirrors has been developed. Each of these mirrors reflects approximately one half of incoming laser beam and focuses it into a point image. Both focused beams have to intersect each other, and in the intersection region an interference pattern was expected. However, the first tests showed that some other spontaneously appearing interference pattern with substantially larger fringe-pitch is generated. The origin of this idle interference pattern is discussed.

Keywords

Extreme ultraviolet (XUV) interferometerAspheric interferometer mirrorsMultilayer reflection coating for 46.9 nmAr8+ laser applicationXUV direct nanostructuring
Type
Research Article
Information
Laser and Particle Beams , Volume 34 , Issue 1 , March 2016 , pp. 11 - 22
Copyright
Copyright © Cambridge University Press 2015 

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References

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