Shanghai Institute of Quantum Optoelectronics, Shanghai Institute of Quantum Quantum Quantum Imaging Research team and the Shanghai Light Source BL13W1 biomedical imaging and application of beam stations, the use of wavelength 0.1nm incoherent X-ray, by measuring the second-order intensity correlation function of the light field in the The Fresnel zone obtained the Fourier transform diffraction spectrum of the amorphous complex amplitude sample, and demonstrated for the first time in the world the X-ray Fourier transform correlation imaging, and successfully reconstructed the amplitude and phase distribution of the sample in the real space.
On September 7, the results were published in the journal Physics Review, Phys. Rev. Lett. 117, 113901 (2016). Subsequently, the paper was selected as the PRL "Editors' Suggestion" together with experimental results of X-ray real-space-related imaging on European ESRF synchrotron radiation and was rapidly identified by Physics [Physics 9, APS, 103 (2016))], Physics Today of the AIP, and Physicsworld.com of the British Physical Society (IOP).
X-ray Fourier transform intensity-related imaging concepts and imaging solutions by the Shanghai Institute of Quantum Quantum imaging team first proposed in the international [Phys. Rev. Lett. 92, 093903 (2004)], which measured by the light field up Fall and its correlation to get the Fourier transform diffraction spectrum of the sample, the imaging sample does not need crystallization, the imaging resolution is limited only by the X-ray wavelength, therefore, the theory can achieve atomic resolution, and does not require the high spatial coherence of the light source , The non-coherent X-ray source can be used to realize the microstructure of the cell tissue and the internal structure of the functional material, and has wide application prospect. At the same time, it provides a possible technical approach for the diffraction imaging of fermions (such as neutron, electron, etc.) which is impossible to obtain high-intensity coherent sources in principle.
Figure 1 X-ray Fourier transform intensity correlation imaging (FGI) protocol
Figure 2 Fourier transform diffraction spectra of experimental samples and real space distribution reconstruction results (the amplitude of the figure, the phase diagram below)