【摘要】 本研究工作主要采用超声分子束、飞秒激光与飞行时间（TOF）质谱等实验技术相结合的方法研究了N₂和O₂分子在飞秒强激光场作用下的光电离.通过分析N₂和O₂分子的飞行时间质谱及碎片离子产额,得到了离子产额的激光强度依赖关系、激光极化效应和偏振度效应,并结合强场理论知识对光电离机制进行了细致地分析.更多还原

【Abstract】 In this work,the experimental techniques of supersonic molecular beam,femtosecond laser and time-of-flight(TOF)mass spectrometry were applied to investigate the photoionizations of nitrogen and oxygen molecules under intense femtosecond laser field.By way of analyzing the TOF mass spectra and yields of fragment ions,we got the dependence of ions on the laser intensity,laser ellipticity and the laser polarizations.In combination with intense field theory,we analyzed the photoionization mechanism in detail.更多还原