Nanofabrication of diffractive optics for X-ray wavefront shaping and imaging
Tuesday, June 8, 2021
11 a.m. – 11:45 a.m. EDT
Kahraman Keskinbora, Research Scientist
Physics
The use of coherent X-rays for materials characterization has a vast range of applications, from developing more efficient energy storage materials to imaging spin waves in modern magnetic materials. Diffractive optics are one of the best options to successfully focus and shape X-ray wavefronts to carry out a specific task, especially in the soft X-ray regime. Whether it is an imaging application or a more complex task, efficient shaping of X-rays requires a diffractive optic to have high aspect ratios and complex geometries. Owing to the specifics of X-ray matter interactions, the fabrication of diffractive optics for this energy range is still a serious nanofabrication challenge.
Keskinbora will give an overview of various ways to overcome this challenge. More specifically, Keskinbora will focus on the advantages of using ion beam lithography (IBL) to fabricate incredibly intricate diffractive optic patterns in a single fabrication step. Keskinbora will talk about the benefits of the dedicated IBL instrument with a multi-species ion beam source that is part of the toolset at MIT.nano, and its applications to diffractive X-ray optics fabrication. Finally, Keskinbora will briefly touch upon the soft X-ray beam-shaping applications of these fascinating X-ray optic devices.
Attendees can join and participate in the series via Zoom. Meeting ID#: 860 986 455.