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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 1, Iss. 7 — Jul. 17, 2006

Design, fabrication, and analysis of chirped multilayer mirrors for reflection of extreme-ultraviolet attosecond pulses

A. Wonisch, U. Neuhäusler, N. M. Kabachnik, T. Uphues, M. Uiberacker, V. Yakovlev, F. Krausz, M. Drescher, U. Kleineberg, and U. Heinzmann  »View Author Affiliations


Applied Optics, Vol. 45, Issue 17, pp. 4147-4156 (2006)
http://dx.doi.org/10.1364/AO.45.004147


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Abstract

Chirped Mo∕Si multilayer coatings have been designed, fabricated, and characterized for use in extreme-ultraviolet attosecond experiments. By numerically simulating the reflection of the attosecond pulse from a multilayer mirror during the optimization procedure based on a genetic algorithm, we obtain optimized layer designs. We show that normal incidence chirped multilayer mirrors capable of reflecting pulses of approximately 100 attoseconds (as) duration can be designed by enhancing the reflectivity bandwidth and optimizing the phase-shift behavior. The chirped multilayer coatings have been fabricated by electron-beam evaporation in an ultrahigh vacuum in combination with ion-beam polishing of the interfaces and in situ reflectivity measurement for layer thickness control. To analyze the aperiodic layer structure by hard-x-ray reflectometry, we have developed an automatic fitting procedure that allows us to determine the individual layer thicknesses with an error of less than 0.05   nm . The fabricated chirped mirror may be used for production of 150–160 as pulses.

© 2006 Optical Society of America

OCIS Codes
(310.1620) Thin films : Interference coatings
(320.0320) Ultrafast optics : Ultrafast optics
(340.7470) X-ray optics : X-ray mirrors

History
Original Manuscript: September 16, 2005
Manuscript Accepted: November 1, 2005

Virtual Issues
Vol. 1, Iss. 7 Virtual Journal for Biomedical Optics

Citation
A. Wonisch, U. Neuhäusler, N. M. Kabachnik, T. Uphues, M. Uiberacker, V. Yakovlev, F. Krausz, M. Drescher, U. Kleineberg, and U. Heinzmann, "Design, fabrication, and analysis of chirped multilayer mirrors for reflection of extreme-ultraviolet attosecond pulses," Appl. Opt. 45, 4147-4156 (2006)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-45-17-4147

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