Phase retrieval by coherent modulation imaging
- Univ. College London, London (United Kingdom). London Centre for Nanotechnology; Research Complex at Harwell, Harwell Campus, Didcot (United Kingdom); Southern Univ. of Science and Technology, Shenzhen (China)
- Univ. College London, London (United Kingdom). London Centre for Nanotechnology; Research Complex at Harwell, Harwell Campus, Didcot (United Kingdom); Tongji Univ., Shanghai (China)
- Univ. College London, London (United Kingdom). London Centre for Nanotechnology; Research Complex at Harwell, Harwell Campus, Didcot (United Kingdom)
- Paul Scherrer Inst. (PSI), Villigen (Switzerland). Swiss Light Source
- Univ. College London, London (United Kingdom). London Centre for Nanotechnology; Research Complex at Harwell, Harwell Campus, Didcot (United Kingdom); Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Phase retrieval is a long-standing problem in imaging when only the intensity of the wavefield can be recorded. Coherent diffraction imaging (CDI) is a lensless technique that uses iterative algorithms to recover amplitude and phase contrast images from diffraction intensity data. For general samples, phase retrieval from a single diffraction pattern has been an algorithmic and experimental challenge. Here we report a method of phase retrieval that uses a known modulation of the sample exit-wave. This coherent modulation imaging (CMI) method removes inherent ambiguities of CDI and uses a reliable, rapidly converging iterative algorithm involving three planes. It works for extended samples, does not require tight support for convergence, and relaxes dynamic range requirements on the detector. CMI provides a robust method for imaging in materials and biological science, while its single-shot capability will benefit the investigation of dynamical processes with pulsed sources, such as X-ray free electron laser.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1342637
- Report Number(s):
- BNL-113431-2017-JA; R&D Project: PO011; KC0201060
- Journal Information:
- Nature Communications, Vol. 7; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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