Upcoming Events

Zone Plates for High Photon Energy Focusing - Lessons from the Past, Reinterpreted

April 16, 2013 11:00AM to 12:00PM
Presenter 
Nicolaie Moldovan, Advanced Diamond Technologies
Location 
Building 401, Room A1100
Type 
Meeting
Series 
XSD/OPT Special Presentation
Abstract:
The presentation reviews the main achievements in zone plates fabrication for X-ray focusing, with accents on how the existent knowledge can be extended to reach the goal of 20 nm resolution at 25 keV photon energy. Several approaches will be discussed, revealing that traditional nanofabrication ways will not work, while new, combined approaches will do the job.

Among the discussed methods: sequential height increases by soft x-ray exposure and electroforming, layered depositions and nanolaminates, zone doubling and resolution increase by adding higher order zones, stacking and composing zone plates by MEMS-enabled alignment, diamond Fresnel lenses, and others. Combining the positives of these approaches leads to a heavily-engineered concept of zone plates fabrication, but with good chances of success, and even a perspective for higher photon energies.