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Phase-contrast imaging of nanostructures by soft x rays from a femtosecond-laser plasma |
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| Authors: | S V Gasilov A Ya Faenov T A Pikuz I Yu Skobelev F Calegari C Vozzi M Nisoli G Sansone G Valentini S De Silvestri S Stagira |
| Institution: | (1) Joint Institute of High Temperatures, Russian Academy of Sciences, Izhorskaya ul. 13/19, Moscow, 127412, Russia;(2) Kansai Photon Science Institute, Japan Atomic Energy Agency, Kizugawa-shi, 619-0215 Kyoto, Japan;(3) National Laboratory for Ultrafast and Ultraintense Optical Science CNR-INFM, Politecnico di Milano, 20133 Milan, Italy |
| Abstract: | The possibility of phase-contrast imaging of nanostructures has been analyzed with the use of a femtosecond-laser plasma as a spatially coherent soft x-ray source and a LiF crystal as an x-ray detector having both the submicron spatial resolution in a wide field of view and a high contrast. It is demonstrated that the spatial coherence length of radiation in the wavelength range 1–13 nm at a distance of 30 cm from the femtosecond-laser plasma source is ?1.5 μm. The achieved spatial coherence of the source is sufficient to obtain high-quality phase-contrast x-ray images of foils with various chemical compositions and a thickness of ?100 nm. |
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