A method and device for generating a broadband continuously tunable coherent extreme ultraviolet light source

Abstract

The invention discloses a method and device for generating a wide-band continuously tunable coherent extreme ultraviolet light source. The method includes: generating a femtosecond laser beam, focusing the laser beam on a working gas, and combining the laser beam and the laser beam in a vacuum environment. The interaction of the working gas generates high-order harmonics; adjusting the incident energy of the laser beam or the pressure of the working gas to change the phase matching conditions of the high-order harmonics, so that the frequency of the high-order harmonics is red-shifted or blue-shifted Shift, so as to realize the continuous tuning of the wavelength of the harmonic radiation of each order of the extreme ultraviolet light source. The present invention also provides a device for realizing the above method. The implementation of the invention can realize the continuous tuning of the wavelengths of each order harmonic radiation of the extreme ultraviolet light source.

Description

technical field [0001] The present invention relates to the fields of strong-field laser physics and attosecond science and technology, and more specifically, to a method and device for generating a broadband continuously tunable coherent extreme ultraviolet light source. Background technique [0002] The wavelength of extreme ultraviolet light is in the spectral region of 10-121nm. It is a kind of high-energy electron radiation, which can cause material energy level transitions and chemical reactions that are difficult to achieve by other methods. Tunable extreme ultraviolet light source is of great significance in the research of laser spectroscopy. It is the main method to achieve high-resolution imaging. In addition, it also has great application prospects in ultra-high-density optical disks, material processing technology and biomedicine. [0003] In the existing methods, the generation of coherent light source is generally realized by the stimulated radiation of the wo...

AI Technical Summary

Problems solved by technology

The patent application number 201310188870.1 describes the method of producing extreme ultraviolet tunable monochromatic coherent light source, which involves the interaction of multicolor laser field and gas, macroscopic phase matching and intraatomic phase matching technology, but it can only tune specific harmonics The wavelength of each order, but cannot simultaneously realize the continuous tuning of the wavelength of the harmonic radiation wavelength of each order of the extreme ultraviolet light source

Therefore, the deficiencies of existing technologies restrict the practical application of tunable extreme ultraviolet light sources

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