Focusing hard X rays to nanometer dimensions by adiabatically focusing lenses

被引：172

作者：

Schroer, CG

Lengeler, B

机构：

[1] DESY, HASYLAB, D-22607 Hamburg, Germany

[2] Univ Aachen, Inst Phys 2, D-52056 Aachen, Germany

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.94.054802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We address the question of what is the smallest spot size that hard x rays can be focused to using refractive optics. A thick refractive x-ray lens is considered, whose aperture is gradually ( adiabatically) adapted to the size of the beam as it converges to the focus. These adiabatically focusing lenses are shown to have a relatively large numerical aperture, focusing hard x rays down to a lateral size of 2 nm (FWHM), well below the theoretical limit for focusing with waveguides [C. Bergemann et al., Phys. Rev. Lett. 91, 204801 ( 2003)].

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页数：4

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