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Femtosecond Rotational Dynamics ofD2Molecules in Superfluid Helium Nanodroplets
Physical Review Letters ( IF 8.1 ) Pub Date : 2022-06-16 , DOI: 10.1103/physrevlett.128.243201
Junjie Qiang 1 , Lianrong Zhou 1 , Peifen Lu 1 , Kang Lin 1 , Yongzhe Ma 1 , Shengzhe Pan 1 , Chenxu Lu 1 , Wenyu Jiang 1 , Fenghao Sun 1 , Wenbin Zhang 1 , Hui Li 1 , Xiaochun Gong 1 , Ilya Sh Averbukh 2 , Yehiam Prior 1, 2 , Constant A Schouder 3 , Henrik Stapelfeldt 3 , Igor N Cherepanov 4 , Mikhail Lemeshko 4 , Wolfgang Jäger 5 , Jian Wu 1, 6, 7
Affiliation  

Rotational dynamics of D2 molecules inside helium nanodroplets is induced by a moderately intense femtosecond pump pulse and measured as a function of time by recording the yield of HeD+ ions, created through strong-field dissociative ionization with a delayed femtosecond probe pulse. The yield oscillates with a period of 185 fs, reflecting field-free rotational wave packet dynamics, and the oscillation persists for more than 500 periods. Within the experimental uncertainty, the rotational constant BHe of the in-droplet D2 molecule, determined by Fourier analysis, is the same as Bgas for an isolated D2 molecule. Our observations show that the D2 molecules inside helium nanodroplets essentially rotate as free D2 molecules.

中文翻译:

超流氦纳米液滴中D2分子的飞秒旋转动力学

的旋转动力学D2氦纳米液滴内的分子由中等强度的飞秒泵脉冲诱导,并通过记录医学博士+离子,通过具有延迟的飞秒探测脉冲的强场离解电离产生。产量以 185 fs 的周期振荡,反映了无场旋转波包动力学,并且振荡持续了 500 多个周期。在实验不确定性范围内,旋转常数液滴内的D2通过傅里叶分析确定的分子与气体对于一个孤立的D2分子。我们的观察表明,D2氦纳米液滴内的分子基本上自由旋转D2分子。
更新日期:2022-06-16
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