Shanghai Institute of Optics and Technology achieved breakthrough in X-ray correlation imaging research

Quantum imaging research team of the Key Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences cooperates with Shanghai BL13W1 biomedical imaging and application beam line station to measure the second-order intensity correlation of light field using incoherent X-ray with a wavelength of 0.1nm. In the function, the Fourier transform diffraction spectrum of the amorphous complex amplitude sample was obtained in the Fresnel region. The first experimental demonstration of the X-ray Fourier transform correlation imaging was performed in the world, and the amplitude of the sample was successfully reconstructed in the real space. Phase distribution.

On September 7, the relevant results were published in the journal Physical Review Letters [Phys. Rev. Lett. 117, 113901 (2016)]. Subsequently, the paper was selected as the PRL Editors' Suggestion together with the experimental results of the X-ray real space correlation imaging on the European ESRF synchrotron radiation, and was quickly acquired by Physics [Physics 9] of the American Physical Society (APS). 103 (2016))], Physics Today, AIP, and Physicsworld.com, IOP.

The concept of the X-ray Fourier transform intensity correlation imaging and the imaging scheme were first proposed by the Shanghai Institute of Optics, Inc. Quantum imaging research team [Phys. Rev. Lett. 92, 093903 (2004)], which measures the rise of the optical field. The Fourier transform diffraction pattern information of the sample is acquired, and the imaging sample does not need to be crystallized. The imaging resolution is limited only by the X-ray wavelength. Therefore, atomic level resolution can theoretically be achieved, and the high spatial coherence of the light source is not required. The incoherent X-ray source can be used to realize the microstructure of cell tissues and functional materials, and has a wide range of application prospects. At the same time, it also provides a possible technical approach for fermion (such as neutron, electron, etc.) diffraction imaging in principle impossible to obtain high brightness coherent sources.

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