Soft X-ray Lensless Imaging in Reflection Mode

Horia Popescu , Franck Fortuna (1) , Renaud Delaunay , Nicolas Jaouen , Carlo Spezzani , Maurizio Sacchi

1 CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière

We report on the development and implementation of methodologies dedicated to soft X-ray imaging by coherent scattering in reflection mode. Two complementary approaches are tested, based on Fourier transform holography and on ptychography. A new method for designing holographic masks has been developed. Our results represent a feasibility test and highlight the potential and limitations of imaging in reflection mode. Reflectivity is less efficient than transmission at soft X-ray wavelengths, hampering the acquisition of good quality images. Nonetheless, it has the potential to image a wider set of samples, notably those that are not transparent to soft X-rays. Although the images obtained so far are of modest quality, these results are extremely encouraging for continuing the development of coherent soft X-ray imaging in reflection mode.

Mots clés: soft X-ray imaging; holography; ptychography; reflection geometry

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Horia Popescu, Franck Fortuna, Renaud Delaunay, Nicolas Jaouen, Carlo Spezzani, et al.. Soft X-ray Lensless Imaging in Reflection Mode. Photonics, 2021, ⟨10.3390/photonics8120569⟩. ⟨hal-03475732⟩