Towards single molecule shape determination with laser generated soft X-rays
Towards single molecule shape determination with laser generated soft X-rays
High Harmonic Generation (HHG) in a gas filled capillary provides a convenient source of coherent soft x-rays, which can be focussed using glass fibre tapers to provide an x-ray source to record diffraction and scattering images of sub-micron particles, to demonstrate the feasibility of moving down in scale to image single molecules. We demonstrate the ability to control and scan the x-ray spectrum. Control over the tuning can be achieved by using different gases, by changing the average intensity of the laser pulse or by varying the quadratic spectral phase of the laser pulse. We observe an ionization-dependent blue-shift of the fundamental wavelength that is directly imprinted on the harmonic wavelengths. The harmonic tuning is shown to depend on nonlinear spectral shifts of the fundamental laser pulse that are due to the plasma created by ionization. We can spatially resolve the x-ray spectra from a single grid diffraction image.
x-ray, HHG, diffraction, scattering
Froud, C.
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de Paula, A.M.
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Rogers, E.T.F.
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Stebbings, S.L.
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Brocklesby, W.S.
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Baumberg, J.J.
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Frey, J.G.
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Neev, J.
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Schaffer, C.B.
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Ostendorf, A.
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Nolte, S.
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12 September 2006
Froud, C.
5462f6f5-3d1e-40e2-a362-d9e4d9ddd691
de Paula, A.M.
834793cd-08ba-4c24-9d74-d8d4d8206867
Rogers, E.T.F.
b92cc8ab-0d91-4b2e-b5c7-8a2f490a36a2
Stebbings, S.L.
18808776-04f6-460f-9e41-886bd0acfced
Brocklesby, W.S.
c53ca2f6-db65-4e19-ad00-eebeb2e6de67
Baumberg, J.J.
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Frey, J.G.
ba60c559-c4af-44f1-87e6-ce69819bf23f
Neev, J.
6ee452b4-b52b-4d09-ae0b-e0c3c621b11b
Schaffer, C.B.
90188a23-db58-4c85-b6b2-91139a3fde4f
Ostendorf, A.
6a50f922-c11d-4d52-ac7b-ea511cd5ccde
Nolte, S.
dad4037c-94dc-4160-a7ec-7c57b020e686
Froud, C., de Paula, A.M., Rogers, E.T.F., Stebbings, S.L., Brocklesby, W.S., Baumberg, J.J. and Frey, J.G.
(2006)
Towards single molecule shape determination with laser generated soft X-rays.
Neev, J., Schaffer, C.B., Ostendorf, A. and Nolte, S.
(eds.)
American Chemical Society 232 National Meeting, San Francisco, USA.
10 - 14 Sep 2006.
Record type:
Conference or Workshop Item
(Other)
Abstract
High Harmonic Generation (HHG) in a gas filled capillary provides a convenient source of coherent soft x-rays, which can be focussed using glass fibre tapers to provide an x-ray source to record diffraction and scattering images of sub-micron particles, to demonstrate the feasibility of moving down in scale to image single molecules. We demonstrate the ability to control and scan the x-ray spectrum. Control over the tuning can be achieved by using different gases, by changing the average intensity of the laser pulse or by varying the quadratic spectral phase of the laser pulse. We observe an ionization-dependent blue-shift of the fundamental wavelength that is directly imprinted on the harmonic wavelengths. The harmonic tuning is shown to depend on nonlinear spectral shifts of the fundamental laser pulse that are due to the plasma created by ionization. We can spatially resolve the x-ray spectra from a single grid diffraction image.
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Published date: 12 September 2006
Venue - Dates:
American Chemical Society 232 National Meeting, San Francisco, USA, 2006-09-10 - 2006-09-14
Keywords:
x-ray, HHG, diffraction, scattering
Organisations:
Chemistry, Optoelectronics Research Centre, Quantum, Light & Matter Group
Identifiers
Local EPrints ID: 41500
URI: http://eprints.soton.ac.uk/id/eprint/41500
PURE UUID: d9443380-4c4f-4adc-9ebf-55d7569ae892
Catalogue record
Date deposited: 20 Sep 2006
Last modified: 16 Mar 2024 02:39
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Contributors
Author:
C. Froud
Author:
A.M. de Paula
Author:
E.T.F. Rogers
Author:
S.L. Stebbings
Author:
J.J. Baumberg
Editor:
J. Neev
Editor:
C.B. Schaffer
Editor:
A. Ostendorf
Editor:
S. Nolte
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