kHz脉冲分子束的产生及其在强场原子分子物理实验中的应用  

Generation of k Hz Pulsed Molecular Beams and Its Application in Experimental Research of Strong Field Atomic and Molecular Physics

作　　者：许少华[1] 王鹏[1] 杨宏[1] 吴成印[1,2] 

机构地区：[1]北京大学物理学院,人工微结构与介观物理国家重点实验室,北京100871 [2]量子物质科学协同创新中心,北京100871

出　　处：《北京大学学报（自然科学版）》2015年第4期591-595,共5页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家重点基础研究发展计划(2013CB922403);国家自然科学基金(61178019)资助

摘　　要：采用悬臂压电脉冲阀,制备出最高重复频率达到3 k Hz的脉冲分子束。通过测量氮气分子束在飞秒激光作用下隧道电离生成的N2+(B-X)荧光光谱,对脉冲阀的性能做了表征。这种k Hz脉冲分子束搭配k Hz飞秒激光器,将推动飞秒强激光驱动的原子分子动力学实验研究。The authors successfully generated pulsed molecular beams with high repetition rate by using a cantilever piezo valve, and the highest repetition rate could reach 3 k Hz. The interaction between intense femtosecond laser fields and nitrogen molecular beams were studied, in which the molecular beams were produced by cantilever piezo valve. Strong fluorescence emissions, which could be assigned to N2＋（B-X）, were observed. The performance of pulse valve was characterized based on the measurement of the fluorescence emission as a function of the repetition rate and the time delay of the pulsed valve. The results demonstrate that pulsed molecular beams can be generated with high quality and high repetition rate. The combination of such pulsed molecular beams and high-frequency k Hz femtosecond lasers will promote the experimental study of molecular dynamics driven by intense femtosecond laser fields.

关 键 词：脉冲分子束 高重复频率 飞秒激光 隧道电离 荧光光谱 

分 类 号：O562[理学—原子与分子物理] O437[理学—物理]