Ultra-broadband support determination for extreme ultraviolet coherent diffractive imaging from a high harmonic source
Ultra-broadband support determination for extreme ultraviolet coherent diffractive imaging from a high harmonic source
Conventional coherent diffractive imaging (CDI) techniques rely on inversion of the two-dimensional phase problem in the fully coherent limit. Current work using synchrotrons has shown that by introducing a flexible parameter in a technique known as polyCDI, some reduced temporal coherence with relative bandwidth ~3% can be tolerated for simple non-dispersive objects. We demonstrate that using a high harmonic source with modulated spectral characteristics, although the excellent temporal coherence properties are lost in detection, it is possible to increase the tolerable relative bandwidth to ~20% by using the shrinkwrap technique and treating the data as if they were fully coherent but noisy. This reduces the integration time by a factor of ~5. This result is critical for the future use of lab-based sources of extreme ultraviolet and soft x-rays for CDI of non-dispersive objects, and we anticipate that it will improve results at synchrotron sources also.
Parsons, A.D.
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Chapman, R.T.
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Baksh, P.
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Mills, B.
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Bajt, S.
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Brocklesby, W.S.
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Frey, J.G.
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September 2013
Parsons, A.D.
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Chapman, R.T.
8a9fe0e2-c408-4188-bf10-e93bf247205c
Baksh, P.
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Mills, B.
05f1886e-96ef-420f-b856-4115f4ab36d0
Bajt, S.
4d8c2ad8-892d-435d-8027-7d8afe9c0242
Brocklesby, W.S.
c53ca2f6-db65-4e19-ad00-eebeb2e6de67
Frey, J.G.
ba60c559-c4af-44f1-87e6-ce69819bf23f
Parsons, A.D., Chapman, R.T., Baksh, P., Mills, B., Bajt, S., Brocklesby, W.S. and Frey, J.G.
(2013)
Ultra-broadband support determination for extreme ultraviolet coherent diffractive imaging from a high harmonic source.
Journal of Optics, 15 (9), [094009].
(doi:10.1088/2040-8978/15/9/094009).
Abstract
Conventional coherent diffractive imaging (CDI) techniques rely on inversion of the two-dimensional phase problem in the fully coherent limit. Current work using synchrotrons has shown that by introducing a flexible parameter in a technique known as polyCDI, some reduced temporal coherence with relative bandwidth ~3% can be tolerated for simple non-dispersive objects. We demonstrate that using a high harmonic source with modulated spectral characteristics, although the excellent temporal coherence properties are lost in detection, it is possible to increase the tolerable relative bandwidth to ~20% by using the shrinkwrap technique and treating the data as if they were fully coherent but noisy. This reduces the integration time by a factor of ~5. This result is critical for the future use of lab-based sources of extreme ultraviolet and soft x-rays for CDI of non-dispersive objects, and we anticipate that it will improve results at synchrotron sources also.
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Published date: September 2013
Organisations:
Optoelectronics Research Centre, Chemistry
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Local EPrints ID: 360438
URI: http://eprints.soton.ac.uk/id/eprint/360438
ISSN: 2040-8986
PURE UUID: bcf0b935-8f64-42d1-abb9-d70d6a80c876
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Date deposited: 09 Dec 2013 16:02
Last modified: 15 Mar 2024 03:27
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Author:
A.D. Parsons
Author:
R.T. Chapman
Author:
P. Baksh
Author:
S. Bajt
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