Characterization of x-ray phase vortices by ptychographic coherent diffractive imaging

被引：40
|
作者：
Vila-Comamala, J. [1 ]
Sakdinawat, A. [2 ]
Guizar-Sicairos, M. [3 ]
机构：
[1] Argonne Natl Lab, Lemont, IL 60439 USA
[2] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA
[3] Paul Scherrer Inst, CH-5232 Villigen, Switzerland
来源：
OPTICS LETTERS | 2014年 / 39卷 / 18期
关键词：
ANGULAR-MOMENTUM; ZONE PLATES; MICROSCOPY; VORTEX; BEAMS;
D O I：
10.1364/OL.39.005281
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We have characterized the x-ray phase vortices generated at the focal spot of various spiral Fresnel zone plates with an outermost zone width of Delta r = 50 nm. The complex-valued wavefields of phase vortices as small as 50 nm in size (FWHM) and several topological charges were reconstructed using ptychographic coherent diffractive imaging. The reconstructed focal spots demonstrate good agreement with the theoretically expected wavefields and diffraction-limited focusing. (C) 2014 Optical Society of America
引用
收藏
页码：5281 / 5284
页数：4
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