摘要
Methane has been used as a nonlinear optical medium to produce tunable coherent vacuum ultraviolet and extreme ultraviolet radiation.A vibrational structure with a vibrational frequency of 820cm^(-1) was observed in a highly resolved third harmonic spectrum.This proved that third harmonic generation is an effective method to probe the higher excited states of molecular gases.
作者
王鹏谦
谢晓波
孙騊亨
WANG Peng-qian;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.
