Coherent diffractive imaging(CDI),with its lensless geometry and theoretically perfect transfer function,is considered as one of the most promising paradigms to achieve the Abbe resolution limit.However,recent advance...Coherent diffractive imaging(CDI),with its lensless geometry and theoretically perfect transfer function,is considered as one of the most promising paradigms to achieve the Abbe resolution limit.However,recent advances on pushing the resolution limit in high-numerical-aperture(NA)CDIs has thus far been challenging.Here,we report a nearly 0.9NA CDI with an optimized imaging factor(k=0.501),pushing the Abbe resolution diffraction limit for the first time in ultra-high-NA scenarios.Leveraging this the ultra-high NA and the Abbe-limit k-factor,we demonstrate a record-high imaging resolution of 0.57λfor CDIs.Our approach builds upon a novel computational framework termed‘rigorous Fraunhofer diffraction’that eliminates the Ewald sphere effect in CDIs,particularly for high NAs.Our framework transforms the general challenge of high-NA,resolution-limited CDIs from relying on approximate and complicated geometric corrections to a solvable problem through rigorous model-based computation.展开更多
基金supported by National Natural Science Foundation of China(52130504,52450258)Key Research and Development Program of Hubei Province(2021BAA013)+2 种基金Innovation Project of Optics Valley Laboratory(OVL2023PY003)Guangdong Basic and Applied Basic Research Foundation(2023A1515030149)Major Science and Technology Innovation Project of HUST(2024ZDKJCX09).
文摘Coherent diffractive imaging(CDI),with its lensless geometry and theoretically perfect transfer function,is considered as one of the most promising paradigms to achieve the Abbe resolution limit.However,recent advances on pushing the resolution limit in high-numerical-aperture(NA)CDIs has thus far been challenging.Here,we report a nearly 0.9NA CDI with an optimized imaging factor(k=0.501),pushing the Abbe resolution diffraction limit for the first time in ultra-high-NA scenarios.Leveraging this the ultra-high NA and the Abbe-limit k-factor,we demonstrate a record-high imaging resolution of 0.57λfor CDIs.Our approach builds upon a novel computational framework termed‘rigorous Fraunhofer diffraction’that eliminates the Ewald sphere effect in CDIs,particularly for high NAs.Our framework transforms the general challenge of high-NA,resolution-limited CDIs from relying on approximate and complicated geometric corrections to a solvable problem through rigorous model-based computation.
