Ceddia et al -- Universal mask for hard X rays -- preprint March 17 2023.pdf (4.34 MB)
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Universal mask for hard X rays

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posted on 2023-03-17, 15:34 authored by David Ceddia, Alaleh Aminzadeh, Philip Cook, Daniele Pelliccia, Andrew Kingston, David Paganin
Multiple exposures, of a single illuminated non-configurable mask that is transversely displaced to a number of specified positions, can be used to create any desired distribution of radiant exposure. An experimental proof-of-concept is given for this idea, employing hard X rays. The method is termed "ghost projection'', since it may be viewed as a reversed form of classical ghost imaging. The written pattern is arbitrary, up to a tunable constant offset, together with a limiting spatial resolution that is governed by the finest features present in the illuminated mask. The method, which is immune to both proximity-correction and aspect-ratio issues, can be used to make a universal lithographic mask in the hard-X-ray regime. Ghost projection may also be used as a dynamically-configurable beam-shaping element, namely the hard-X-ray equivalent of a spatial light modulator. The idea may be applied to other forms of radiation and matter waves, such as gamma rays, neutrons, electrons, muons, and atomic beams.


Funder Name

Australian Research Council; European Synchrotron Radiation Facility

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