Multichannel selective femtosecond coherent control based on symmetry properties.
Multichannel selective femtosecond coherent control based on symmetry properties.
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DOI：
10.1103/physrevlett.100.193002
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发表时间：
2007-09
影响因子：
8.6
通讯作者：
Z. Amitay;A. Gandman;Lev Chuntonov;L. Rybak
中科院分区：
文献类型：
--
作者：
Z. Amitay;A. Gandman;Lev Chuntonov;L. Rybak
提出并实现了一种基于激励通道对称性的扩展多通道选择性飞秒相干控制新方案。在这里，原子非共振双光子吸收通道被相干地整合到共振介导的（2+1）三光子吸收通道中。通过适当的脉冲整形，利用双光子吸收对脉冲特定相位变换的不变性，对于任何可能的双光子吸收产率，三光子吸收在一个数量级的产率范围内独立调谐。值得注意的是一组“双光子暗脉冲”诱导广泛可调的三光子吸收。
We present and implement a new scheme for extended multichannel selective femtosecond coherent control based on symmetry properties of the excitation channels. Here, an atomic nonresonant two-photon absorption channel is coherently incorporated in a resonance-mediated (2+1) three-photon absorption channel. By proper pulse shaping, utilizing the invariance of the two-photon absorption to specific phase transformations of the pulse, the three-photon absorption is tuned independently over an order-of-magnitude yield range for any possible two-photon absorption yield. Noticeable is a set of "two-photon dark pulses" inducing widely tunable three-photon absorption.