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《中国物理C》(英文)编辑部
2024年10月30日

Influence of Angle Range of Recording A Hologram to the Reconstructed Atomic Image in X-ray Fluorescence Holography

  • X-ray fluorescence holography is a novel method for three-dimensional (3D) imaging of local atomic structure.Theoretically,in an XFH experiment,one has to measure the fluorescence energy on a spherical surface with angular resolution in the degree range to get well-resolved three-dimensional (3D) images of atoms.But in practice,experimental system arrangement of XFH does not allow the measurement of the fluorescent intensity oscillations in the full sphere.The holographic informaion loss because of the limited sampling range (less than 4π) will directly result in defective reconstructed atomic images.In this work,we investigate the influence of angle range and step of recording an X-ray fluorescence hologram on reconstructed atomic images by numerically simulating X-ray fluorescence holograms of Fe single crystal at different recording angle range and step.The Fe atomic images in the plane parallel to the crystal (001) crystallographic plane reconstructed from these simulated holograms can show this influence.The incomplete range of azimuth angle causes inhomogeneous brightness of the reconstructed atomic images.The incomplete range of polar angle causes the reconstructed atomic positions slightly shifted toward the central site and the increase of background brightness.The influence of the polar angle step on the reconstructed atomic images can be ignored if the step is enough small.
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  • [1] Gahor D. Nature, 1948, 161 :7772 Szoke A. In: Short Wavelength Coherent Radiation: Generation and Applications, edited by Atwood T and Boker J , AIP Conf. Proc.1986, 147 ( AIP, New York) :3613 Harp G R , Saldin D K , Tanner B P. Phys. Rev. Lett. , 1990, 65:10124 Tegze M , Faigel G. Nature, 1996, 380 :495 Adams B, Novikov D V et al. Phys. Rev. , 1998, B57:75266 Tegze M, Faigel G et al. Phys. Rev. Lett. , 1999, 82:48477 Marchesini S et al. Phys. Rev. Lett. , 2000, 85 :47238 John S. Nature, 2001 , 410 : 10379 Kopecky M et al. Phys. Rev. Lett. , 2002, 88 : 18550310 Faigel G, Tegze M. Rep. Prog. Phys. , 1999, 62 :35511 Born M , Wolf E. Principles of Optics, 1959, (London: Pergamon)12 Barton J J. Phys. Rev. Lett. , 1988, 61 :I356
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XIE Hong-Lan, CHEN Jian-Wen, GAO Hong-Yi, LI Ru-Xin and XU Zhi-Zhan. Influence of Angle Range of Recording A Hologram to the Reconstructed Atomic Image in X-ray Fluorescence Holography[J]. Chinese Physics C, 2003, 27(S1): 86-91.
XIE Hong-Lan, CHEN Jian-Wen, GAO Hong-Yi, LI Ru-Xin and XU Zhi-Zhan. Influence of Angle Range of Recording A Hologram to the Reconstructed Atomic Image in X-ray Fluorescence Holography[J]. Chinese Physics C, 2003, 27(S1): 86-91. shu
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Received: 2003-11-21
Revised: 1900-01-01
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Influence of Angle Range of Recording A Hologram to the Reconstructed Atomic Image in X-ray Fluorescence Holography

    Corresponding author: CHEN Jian-Wen,
  • Shanghai Institute of Optics and Fine Mechanics,CAS,Shanghai 201800,China

Abstract: X-ray fluorescence holography is a novel method for three-dimensional (3D) imaging of local atomic structure.Theoretically,in an XFH experiment,one has to measure the fluorescence energy on a spherical surface with angular resolution in the degree range to get well-resolved three-dimensional (3D) images of atoms.But in practice,experimental system arrangement of XFH does not allow the measurement of the fluorescent intensity oscillations in the full sphere.The holographic informaion loss because of the limited sampling range (less than 4π) will directly result in defective reconstructed atomic images.In this work,we investigate the influence of angle range and step of recording an X-ray fluorescence hologram on reconstructed atomic images by numerically simulating X-ray fluorescence holograms of Fe single crystal at different recording angle range and step.The Fe atomic images in the plane parallel to the crystal (001) crystallographic plane reconstructed from these simulated holograms can show this influence.The incomplete range of azimuth angle causes inhomogeneous brightness of the reconstructed atomic images.The incomplete range of polar angle causes the reconstructed atomic positions slightly shifted toward the central site and the increase of background brightness.The influence of the polar angle step on the reconstructed atomic images can be ignored if the step is enough small.

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