Recently, a research group led by Prof. FU Yuxi and WANG Hushan from Xi’an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences developed a snapshot ultra-broadband coherent diffractive imaging (CDI) method for attosecond imaging. The study was published in Photonics Research.
Attosecond pulses provide unprecedented temporal resolution and have found many applications in studying atoms and molecules. However, their broadband spectra, incompatible with the conventional imaging method, severely hinder the advancement of attosecond imaging.
In this study, researchers developed a new imaging method, named gradient monochromatization with Fourier transformation based pattern Mapping (GM-FTM). FTM was proposed to transform the lossless monochromatic pattern across each wavelength, and GM was deployed to solve monochromatic patterns. The solved patterns were then fed into conventional CDI algorithms to perform the final image reconstruction. This method can achieve broadband CDI with high fidelity.
Researchers found that the method can provide great image quality and computational efficiency improvements compared to the state-of-the-art broadband imaging methods, and support a much broader bandwidth up to ~140%.
"The proposed method is a step forward in attosecond imaging with both ultra-high temporal and spatial resolutions," said Prof. FU.
SHI Qianqian
Xi’an Institute of Optics and Precision Mechanics
E-mail: shiqianqian@opt.ac.cn
A research team from Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences proposed an ultra-broadband coherent imaging method to overcome the incompatibility between attosecond pulses with conventional imaging methods. The method was valida...
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