High-efficiency zone-plate optics for multi-keV X-ray focusing
2014 ◽
Vol 21
(3)
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pp. 497-501
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High-efficiency nanofocusing of hard X-rays using stacked multilevel Fresnel zone plates with a smallest zone width of 200 nm is demonstrated. The approach is to approximate the ideal parabolic lens profile with two-, three-, four- and six-level zone plates. By stacking binary and three-level zone plates with an additional binary zone plate, the number of levels in the optical transmission function was doubled, resulting in four- and six-level profiles, respectively. Efficiencies up to 53.7% focusing were experimentally obtained with 6.5 keV photons using a compact alignment apparatus based on piezoelectric actuators. The measurements have also been compared with numerical simulations to study the misalignment of the two zone plates.
High-efficiency Fresnel zone plates for hard X-rays by 100 keV e-beam lithography and electroplating
2011 ◽
Vol 18
(3)
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pp. 442-446
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1994 ◽
Vol 23
(1-4)
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pp. 101-104
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2015 ◽
Vol 33
(6)
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pp. 06FD04
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