Seminars

Double-sided Fresnel zone plates as high performance optics for the multi-keV X-ray range

by István Mohácsi (Paul Scherrer Institut, Villigen)

Europe/Berlin
Bldg. 25f, room 456 (DESY Hamburg)

Bldg. 25f, room 456

DESY Hamburg

Description
Multi-keV X-ray microscopy has been particularly successful in bridging the resolution gap between optical and electron microscopy. Diffractive X-ray optics, such as Fresnel zone plates, are widely used optical elements in X-ray microscopy, however their optical performance is closely limited by the possibilities of available fabrication techniques. While these limitations can be eased by the stacking of two separate zone plates, the complexity of such a setup led us to investigate an alternative solution to exchange mechanical stacking with the double-sided patterning of the same support membrane. We show, that these double-sided Fresnel zone plate optics can improve both the focusing efficiency and the resolution of zone plates beyond the limitations of a conventional zone plates, while providing excellent optical quality.