From a classical dynamic simulation,we find the kinetic energy of the electrons generated during laser plasma generation depends on the laser polarization and intensity.The electron kinetic energy reaches its maximum ...From a classical dynamic simulation,we find the kinetic energy of the electrons generated during laser plasma generation depends on the laser polarization and intensity.The electron kinetic energy reaches its maximum with a fixed laser intensity for circularly polarized laser pulse.The fluorescence spectra at 380.4 nm from N2 and 391.3 nm from N2^＋ are measured;these are generated by both the direct excitation and electron collision excitation.The electron collision excitation is determined by the electron energy and reaches the maximal with a circularly polarized pulse.展开更多
We are reporting a theoretical prediction： The photoelectrons forming above-threshold-ionization （ATI） peaks emit both even and odd harmonics. These harmonics exhibit plateau and cut-off features similar to those o...We are reporting a theoretical prediction： The photoelectrons forming above-threshold-ionization （ATI） peaks emit both even and odd harmonics. These harmonics exhibit plateau and cut-off features similar to those odd-only harmonics observed in ATI experiments.展开更多
基金supported by the National Natural Science Foundation of China(Nos.11504148 and 11135002)the Fundamental Research Funds for the Central Universities(Nos.lzujbky-2015-269 and lzujbky-2015-242)
文摘From a classical dynamic simulation,we find the kinetic energy of the electrons generated during laser plasma generation depends on the laser polarization and intensity.The electron kinetic energy reaches its maximum with a fixed laser intensity for circularly polarized laser pulse.The fluorescence spectra at 380.4 nm from N2 and 391.3 nm from N2^＋ are measured;these are generated by both the direct excitation and electron collision excitation.The electron collision excitation is determined by the electron energy and reaches the maximal with a circularly polarized pulse.
基金Acknowledgements This work was supported in part by the National Natural Science Foundation of China （Grant Nos. 11174304 and 61078080）, the National Basic Research Program of China （973 Program） （Grant Nos. 2010CB923203 and 2011CB808103）, and also the National Natural Science Foundation of China under Grant No. 11172302.
文摘We are reporting a theoretical prediction： The photoelectrons forming above-threshold-ionization （ATI） peaks emit both even and odd harmonics. These harmonics exhibit plateau and cut-off features similar to those odd-only harmonics observed in ATI experiments.
