多原子分子的阿秒碰撞控制的选择性碎裂
Attosecond-recollision-controlled selective fragmentation of polyatomic molecules
摘要：
实验上证明了用几个周期的强激光脉冲的光波形控制一系列多原子分子（乙炔、乙烯、1，3-丁二烯）的各种碎裂反应。我们从实验和理论两方面证明了负责任的机制是电子波包从内价分子轨道的非弹性电离，在几个周期的电离激光脉冲中，电子波包的非弹性电离能量强烈地依赖于光波形。我们的工作展示了一个有效的和选择性的方式预先确定的亚飞秒时间尺度上的多原子分子的碎裂和异构化反应。
英文摘要：
Control over various fragmentation reactions of a series of polyatomic molecules (acetylene, ethylene, 1,3-butadiene) by the optical waveform of intense few-cycle laser pulses is demonstrated experimentally. We show both experimentally and theoretically that the responsible mechanism is inelastic ionization from inner-valence molecular orbitals by recolliding electron wavepackets, whose recollision energy in few-cycle ionizing laser pulses strongly depends on the optical waveform. Our work demonstrates an efficient and selective way of pre-determining fragmentation and isomerization reactions in polyatomic molecules on sub-femtosecond time-scales.
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