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Non-thermal desorption/ablation of molecular solids induced by ultra-short soft x-ray pulses
- Chalupsky, J (author)
- Juha, L (author)
- Hajkova, V (author)
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- Cihelka, J (author)
- Vysin, L (author)
- Gautier, J (author)
- Hau-Riege, P (author)
- Jurek, M (author)
- Krzywinski, J (author)
- London, A (author)
- Papalazarou, E (author)
- Pelka, B (author)
- Rey, G (author)
- Sebban, S (author)
- Sobierajski, R (author)
- Stojanovic, N (author)
- Tiedtke, K (author)
- Toleikis, S (author)
- Tschentscher, T (author)
- Valentin, C (author)
- Wabnitz, H (author)
- Zeitoun, P (author)
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- (creator_code:org_t)
- 2009
- 2009
- English.
- In: Optics Express. - 1094-4087. ; 17:1, s. 208-217
- Journal article (peer-reviewed)
Abstract
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- We report the first observation of single-shot soft x-ray laser induced desorption occurring below the ablation threshold in a thin layer of poly ( methyl methacrylate) - PMMA. Irradiated by the focused beam from the Free-electron LASer in Hamburg ( FLASH) at 21.7nm, the samples have been investigated by atomic-force microscope (AFM) enabling the visualization of mild surface modifications caused by the desorption. A model describing non-thermal desorption and ablation has been developed and used to analyze single-shot imprints in PMMA. An intermediate regime of materials removal has been found, confirming model predictions. We also report below-threshold multiple-shot desorption of PMMA induced by high-order harmonics (HOH) at 32nm. Short-time exposure imprints provide sufficient information about transverse beam profile in HOH's tight focus whereas long-time exposed PMMA exhibits radiation-initiated surface hardening making the beam profile measurement infeasible. (C) 2008 Optical Society of America
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Physics
- Fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Chalupsky, J
- Juha, L
- Hajkova, V
- Cihelka, J
- Vysin, L
- Gautier, J
- show more...
- Hajdu, J
- Hau-Riege, P
- Jurek, M
- Krzywinski, J
- London, A
- Papalazarou, E
- Pelka, B
- Rey, G
- Sebban, S
- Sobierajski, R
- Stojanovic, N
- Tiedtke, K
- Toleikis, S
- Tschentscher, T
- Valentin, C
- Wabnitz, H
- Zeitoun, P
- show less...
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- NATURAL SCIENCES
- NATURAL SCIENCES
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- Optics Express
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- Uppsala University
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