Use of extended and prepared reference objects in experimental Fourier transform x-ray holography

The use of one or more gold nanoballs as reference objects for Fourier transform holography (FTH) is analyzed using experimental soft x-ray diffraction from objects consisting of separated clusters of these balls. The holograms are deconvoluted against ball reference objects to invert to images, in...

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Bibliographic Details
Published in:Applied physics letters 2004-09, Vol.85 (13), p.2454-2456
Main Authors: He, H., Weierstall, U., Spence, J. C. H., Howells, M., Padmore, H. A., Marchesini, S., Chapman, H. N.
Format: Article
Language:English
Subjects:
FOURIER TRANSFORMATION
GOLD
HOLOGRAPHY
IMAGE PROCESSING
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
NANOSTRUCTURES
SOFT X RADIATION
SPATIAL RESOLUTION
X-RAY DIFFRACTION
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Summary:The use of one or more gold nanoballs as reference objects for Fourier transform holography (FTH) is analyzed using experimental soft x-ray diffraction from objects consisting of separated clusters of these balls. The holograms are deconvoluted against ball reference objects to invert to images, in combination with a Wiener filter to control noise. A resolution of ∼ 30 nm , smaller than one ball, is obtained even if a large cluster of balls is used as the reference, giving the best resolution yet obtained by x-ray FTH. Methods of dealing with missing data due to a beamstop are discussed. Practical prepared objects which satisfy the FTH condition are suggested, and methods of forming them described.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1795360