A tunable XUV monochromatic light source based on the time preserving grating selection of high-order harmonic generation  

作　　者：牛永 梁红静 刘燚 刘方圆 马日 丁大军 

机构地区：[1]Institute of Atomic and Molecular Physics Jilin University [2]Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy Jilin University

出　　处：《Chinese Physics B》2017年第7期194-198,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grants Nos.11627807,11127403,and 11474130);the National Basic Research Program of China(Grant No.2013CB922200);the Natural Science Foundation of Jilin Province of China(Grant No.20160101332JC)

摘　　要：We accomplish a laboratory facility for producing a femtosecond XUV coherent monochromatic radiation with a broad tunable spectral range of 20 eV-75 eV. It is based on spectral selected single-order harmonics from intense laser driven high harmonic generation in gas phase. The time preserving for the selected harmonic radiation is achieved by a Czerny-Turner type monochromator designed with a conical diffraction grating mount for minimizing the time broadening caused by grating diffraction and keeping a relatively high diffraction efficiency. Our measurement shows that the photon flux of the 23-order harmonic（H23） centered at 35.7 eV is 1×10~9 photons/s approximately with a resolving power E/？E ≈ 36.This source provides an ultrashort tunable monochromatic XUV beam for ultrafast studies of electronic and structural dynamics in a large variety of matters.We accomplish a laboratory facility for producing a femtosecond XUV coherent monochromatic radiation with a broad tunable spectral range of 20 eV-75 eV. It is based on spectral selected single-order harmonics from intense laser driven high harmonic generation in gas phase. The time preserving for the selected harmonic radiation is achieved by a Czerny-Turner type monochromator designed with a conical diffraction grating mount for minimizing the time broadening caused by grating diffraction and keeping a relatively high diffraction efficiency. Our measurement shows that the photon flux of the 23-order harmonic（H23） centered at 35.7 eV is 1×10~9 photons/s approximately with a resolving power E/？E ≈ 36.This source provides an ultrashort tunable monochromatic XUV beam for ultrafast studies of electronic and structural dynamics in a large variety of matters.

关 键 词：high harmonic generation conical diffraction time preserving monochromator femtosecond extreme ultraviolet pulse 

分 类 号：O43[机械工程—光学工程]