High-efficiency Fresnel zone plates for hard X-rays
Author Information
Author(s): Sergey Gorelick, Joan Vila-Comamala, Vitaliy A. Guzenko, Ray Barrett, Murielle Salomé, Christian David
Primary Institution: Paul Scherrer Institut
Hypothesis
Can high-aspect-ratio Fresnel zone plates (FZPs) be efficiently fabricated for hard X-ray applications?
Conclusion
The study successfully developed a reliable method for fabricating high-quality FZPs with diffraction efficiencies of 60-80% of theoretical values.
Supporting Evidence
- FZPs were fabricated with outermost zone widths down to 50 nm and diameters up to 600 µm.
- Diffraction efficiencies were measured for a wide range of X-ray energies (2.8–13.2 keV).
- The measured efficiencies were 60-80% of the theoretical maximum values.
Takeaway
The researchers made special lenses that help us see tiny things using X-rays, and they found a way to make them work really well.
Methodology
The FZPs were fabricated using 100 keV electron-beam lithography and electroplating, followed by measuring their diffraction efficiencies over a range of X-ray energies.
Limitations
The main limitation is the reduced density of electroplated Au compared to bulk Au, which affects the diffraction efficiency.
Digital Object Identifier (DOI)
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