研究目的
Investigating the method to remove or greatly suppress the spatial error in molecular structure retrieval caused by the scattering phase in photoelectron holography.
研究成果
The proposed method effectively removes or greatly suppresses the spatial error in atomic position retrieval caused by the electron-atom scattering phase in photoelectron holography, as demonstrated by numerical examples with both linearly and circularly polarized x rays.
研究不足
The method assumes single-scattering approximation, which is valid for photoelectron energies above about 100 eV. The accuracy of the theoretical scattering factor used in the improved HK transform may affect the retrieval precision.
1：Experimental Design and Method Selection:
The study proposes an improved method for molecular structure retrieval in photoelectron holography by dividing a theoretical scattering factor before performing a Helmholtz-Kirchhoff (HK) transform to remove the error caused by the scattering phase.
2：Sample Selection and Data Sources:
Numerical examples using the molecule CF3Cl are used to demonstrate the method.
3：List of Experimental Equipment and Materials:
The study utilizes theoretical calculations and numerical simulations without specifying physical equipment.
4：Experimental Procedures and Operational Workflow:
The method involves performing an original HK transform to get a rough position for each atom, then applying the improved HK transform to obtain a more precise position.
5：Data Analysis Methods:
The analysis involves comparing the retrieved atomic positions from the original and improved HK transforms with the actual positions.
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