A Method of Producing a Coherent Extreme Ultraviolet Light Source Approximately Circularly Partial

A coherent light source and extreme ultraviolet technology, applied in the direction of phonon exciters, circuits, electrical components, etc., can solve the problems of long attosecond pulse width, low intensity, and impractical practical application, and achieve short pulse width , high production efficiency and high electron recovery efficiency
CN104701730BInactive Publication Date: 2018-12-28HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2018-12-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for generating an extreme ultraviolet coherent light source with approximate circular deflection. The method comprises the following steps of (S1) enhancing linear polarization incident laser until the intensity level of the linear polarization incident laser reaches 1013-1014W / CM(2); (S2) performing interaction on the enhanced incident laser and diatomic gas molecules to generate a harmonic; adjusting an included angle between the polarization direction of the linear polarization incident laser and a molecular axis until a harmonic stage required for generation of the light source is acquired; and (S3) converting spectra of two harmonic components of which the energy intensities are equal to each other and the relative phases are 90 degrees in the harmonic stage into two attosecond pulses, and synthesizing the two attosecond pulses to obtain the extreme ultraviolet coherent light source with approximate circular deflection. A harmonic spectrum has two components in two different directions; the energy intensities of the components of the harmonic spectrum in the harmonic stage are equal to each other; and the relative phases are 90 degrees. By the method for generating the extreme ultraviolet coherent light source with approximate circular deflection, the generated extreme ultraviolet coherent light source with approximate circular deflection is high in harmonic efficiency and short in pulse width.
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Description

technical field

[0001] The invention relates to the field of ultrafast laser technology, and more specifically, to a method for generating an approximately circularly deflected extreme ultraviolet coherent light source. Background technique

[0002] Attosecond pulses based on high-order harmonics have broad application prospects in the detection of ultrafast dynamics. Due to its excellent coherence, high-order harmonics have become the preferred solution for coherent extreme ultraviolet light sources. Most of the research in the past was mainly used to generate linearly polarized attosecond pulses, but there are also important applications for the ellipsometric properties of single attosecond pulses. For example, during strong field ionization, N 2 The harmonic spectrum with ellipsometry produced by the molecule enables the detection of multi-electron effects. Circularly deflected pulses can generate rotating circular electron wave packets, resulting in a large dependence...

Claims

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