论文标题
氩气中的多边带兔子
Multi-Sideband RABBIT in Argon
论文作者
论文摘要
我们报告了三侧（3-SB）修改“通过干扰两光子过渡的重建”（兔子）设置的三边带（3-SB）修改的联合实验和理论研究。 3-SB兔子方案使得可以研究连续体中不同顺序的过渡之间的干扰产生的相。此外，这种方法的强度在于它仅通过比较从两个相邻谐波形成的特定SB基团提取的兔相，才能仅关注与谐波中的呼吸相关的原子阶段。我们验证了早期的预测，即从角度集成测量的三个SB中的相位和相应的时间延迟随着光子电子能量的增加而变得相似。三个SBS中兔相的角度依赖性的变化是由与单个角动量通道相关的独特的Wigner和Continuum-Continuum耦合阶段产生的。通过调用倾向规则来尝试对这种依赖性的定性解释。从R-Matrix（密切耦合）与时间依赖计算的实验数据和预测之间的比较显示观察到的趋势中的定性一致性。
We report a joint experimental and theoretical study of a three-sideband (3-SB) modification of the "reconstruction of attosecond beating by interference of two-photon transitions" (RABBIT) setup. The 3-SB RABBIT scheme makes it possible to investigate phases resulting from interference between transitions of different orders in the continuum. Furthermore, the strength of this method is its ability to focus on the atomic phases only, independent of a chirp in the harmonics, by comparing the RABBIT phases extracted from specific SB groups formed by two adjacent harmonics. We verify earlier predictions that the phases and the corresponding time delays in the three SBs extracted from angle-integrated measurements become similar with increasing photon electron energy. A variation in the angle dependence of the RABBIT phases in the three SBs results from the distinct Wigner and continuum-continuum coupling phases associated with the individual angular momentum channels. A qualitative explanation of this dependence is attempted by invoking a propensity rule. Comparison between the experimental data and predictions from an R-matrix (close-coupling) with time dependence calculation shows qualitative agreement in the observed trends.
