摘要
Tunalbe coherent extreme ultraviolet radiation has been produced in nitrogen by third harmonic generation(THG)processes enhanced by two-photon resonance with the a^(1)II_(g)(v'=1)state and three-photon resonance with the c'_(4)^(1)Σ_(u)^(+)(v'=1)state,respectively.The highly resolved THG spectra imply that THG can be used to probe the higher excited states and to detect the rotational population of a molecular gas.
作者
王鹏谦
操传顺
谢晓波
孙騊亨
WANG Peng-qian;CAO Chuan-shun;XIE Xiao-bo;SUN Tao-heng(Department of Physics,Peking University,Beijing 100871)
基金
Supported by the High Technology Program of Lasers(863-410)
the National Natural Science Foundation of China under Grant No.19584001.
