Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for detecting atomic structure on basis of photoelectron holographic imaging

A holographic imaging, atomic structure technology, applied in the direction of material excitation analysis, etc.

Inactive Publication Date: 2016-05-04
HUAZHONG UNIV OF SCI & TECH
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to use this hologram to detect the information of atomic scattering amplitude is still an unsolved problem

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for detecting atomic structure on basis of photoelectron holographic imaging
  • Method for detecting atomic structure on basis of photoelectron holographic imaging
  • Method for detecting atomic structure on basis of photoelectron holographic imaging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] In the present invention, the femtosecond laser in the mid-infrared band is used to act on the atom to be detected, and the two-dimensional momentum spectrum of the electron of the atom ionized by the laser is measured. The measured momentum spectrum will have a very obvious interference structure in the direction perpendicular to the laser polarization, that is, a photoelectron hologram. By analyzing this interference structure, the phase difference of direct electron and scattered electron wave packets is extracted. Then, using the extracted phase difference, according to the formula Ca...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
wavelengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for detecting an atomic structure on basis of photoelectron holographic imaging. The method is characterized in that a momentum spectrum of a photoelectron generated due to ionization caused by action of high-power laser on an atom is measured, and an interference structure in the momentum spectrum is analyzed, so that phase information of atomic scattering amplitude can be obtained. The method comprises the following steps that the atom is ionized by utilization of high-intensity femtosecond laser, and the momentum spectrum of the photoelectron obtained through ionization is measured; the measured momentum spectrum is analyzed, and the phase information of the atomic scattering amplitude is extracted from holographic interferogram. The method disclosed by the invention has an important application value for comprehensively understanding the atomic structure due to the inexistence of an effective method for detecting the phase information of the atomic scattering amplitude at present.

Description

technical field [0001] The invention belongs to the field of interaction between strong-field laser and atoms or molecules, and more specifically relates to a method for detecting atomic structures based on photoelectron holographic imaging. Background technique [0002] Atom scattering amplitude is a basic physical parameter of atomic and molecular physics. Typically, electron beams are used to strike atoms, and information on the scattering amplitude is extracted from the scattered electron spectrum. The information thus measured is the magnitude of the scattering amplitude. We know that the scattering amplitude is a complex number, which has both amplitude and phase. To measure the phase of the scattered amplitude, two coherent electron beams are required. One beam of electrons reaches the detector directly without interacting with the atoms, and the other beam of electrons reaches the detector after being scattered by the atoms. Interference structures appear in the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/63
CPCG01N21/63
Inventor 周月明陆培祥何明睿
Owner HUAZHONG UNIV OF SCI & TECH