Ultra-high resolution zone-doubled diffractive X-ray optics for the multi-keV regime
Joan Vila-Comamala1, Sergey Gorelick, Elina Färm
1Paul Scherrer Institut, Villigen, Switzerland. joan.vila@psi.ch
Optics Express
|January 26, 2011
Summary
Researchers developed advanced Fresnel zone plates for X-ray microscopy, achieving 15 nm resolution. This breakthrough enables higher-resolution imaging of materials using hard X-rays up to 12 keV.
Area of Science:
- Optics and Photonics
- Materials Science
- Microscopy
Background:
- Fresnel zone plates (FZPs) are crucial for X-ray microscopy, enabling sub-100 nm resolution.
- Current FZP technology faces limitations in achieving higher resolutions at higher photon energies.
Purpose of the Study:
- To model, fabricate, and characterize novel zone-doubled FZPs.
- To advance spatial resolution in hard X-ray microscopy for multi-keV photon energies (4-12 keV).
Main Methods:
- Development of zone-doubled FZP designs.
- Fabrication of the advanced FZPs.
- Characterization using scanning transmission X-ray microscopy (STXM).
Main Results:
- Demonstrated unprecedented spatial resolution, resolving 15 nm lines and spaces.
- Achieved focusing diffraction efficiencies of 7.5% at 6.2 keV.
- Validated performance in the multi-keV energy range (4-12 keV).
Conclusions:
- Zone-doubled FZPs significantly enhance spatial resolution in hard X-ray microscopy.
- This advancement is a key step towards achieving 10 nm resolution at high X-ray energies.
- The developed FZPs offer improved capabilities for imaging diverse materials.
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