Huixiang Lin, Jin Niu, Kui Li, Pengju Sheng, Angyi Lin, Jianfeng You, Jie Li, Xiaoshi Zhang, Fucai Zhang，“Single-frame multiwavelength coherent diffraction imaging using extreme ultraviolet high-harmonic comb sources”，Chinese Optics Letters 23 (4), 040502（2025）

【原文】

Single-frame multiwavelength coherent diffraction imaging using extreme ultraviolet high-harmonic comb sources

ABSTRACT

Coherent diffraction imaging (CDI) enables diffraction-limited high-resolution imaging without using high-quality lenses. It will be desirable to combine it with multiple spectral light sources to achieve chemically resolved imaging capability. Here, we demonstrate a single-frame multiwavelength CDI approach that can provide complex transmittance images of a sample at multiple wavelengths. The superior performance of our method in terms of rapid convergence and improved image quality over current methods has been validated through high-harmonic extreme ultraviolet experiments. The feasibility of our method for single-frame chemical imaging is also demonstrated by the simulation. This work can pave the way for implementing in situ chemical imaging with tabletop high-harmonic generation extreme ultraviolet sources.