Fourier-transform ghost imaging with super-Rayleigh speckles

作者：Qian Chen, Zhijie Tan, Hong Yu, Shensheng Han · 发表于：Optics Express · 年份：2023 · DOI：10.1364/oe.491996 · 被引用次数：11 · 研究领域：Random lasers and scattering media、Advanced Optical Imaging Technologies、Plant and animal studies

Ghost imaging based on the high-order correlation of optical field has developed rapidly and has been extended to the x-ray region. However, the limited flux leads to severe image deterioration. Here, an approach of Fourier-transform ghost imaging with super-Rayleigh speckles is proposed to realize high quality ghost imaging at low photon flux level. The super-Rayleigh speckles are designed by optimizing binary modulating screens based on the direct binary search algorithm. The experimental results show that the speckle contrast can be greatly enhanced and high visibility Fourier-transform diffraction pattern of the sample can be obtained. The sample's image in spatial domain is successfully achieved even if the detected photon level decreases to 0.1 photons/pixel. This method is of great importance for high-resolution imaging in the photon-limited scenarios, especially for laboratory x-ray systems.