Multi-slice ptychography with large numerical aperture multilayer Laue lenses

• Published in: Optica Vol. 5; no. 5; p. 601
• Main Authors: Öztürk, Hande, Yan, Hanfei, He, Yan, Ge, Mingyuan, Dong, Zhihua, Lin, Meifeng, Nazaretski, Evgeny, Robinson, Ian K., Chu, Yong S., Huang, Xiaojing
• Format: Journal Article
• Language: English
• Published: United States Optical Society of America 20.05.2018
• Subjects: MATERIALS SCIENCE; Phase retrieval; X-ray imaging; X-ray optics
• ISSN: 2334-2536; 2334-2536
• DOI: 10.1364/OPTICA.5.000601

Here, the highly convergent x-ray beam focused by multilayer Laue lenses with large numerical apertures is used as a three-dimensional (3D) probe to image layered structures with an axial separation larger than the depth of focus. Instead of collecting weakly scattered high-spatial-frequency signals, the depth-resolving power is provided purely by the intense central cone diverged from the focused beam. Using the multi-slice ptychography method combined with the on-the-fly scan scheme, two layers of nanoparticles separated by 10 μm are successfully reconstructed with 8.1 nm lateral resolution and with a dwell time as low as 0.05 s per scan point. This approach obtains high-resolution images with extended depth of field, which paves the way for multi-slice ptychography as a high throughput technique for high-resolution 3D imaging of thick samples.