Köhler Jens, Wollenhaupt Matthias, Bayer Tim, Sarpe Cristian, Baumert Thomas
Universität Kassel, Institut für Physik und Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), Kassel, Germany.
Opt Express. 2011 Jun 6;19(12):11638-53. doi: 10.1364/OE.19.011638.
We investigate the temporal precision in the generation of ultrashort laser pulse pairs by pulse shaping techniques. To this end, we combine a femtosecond polarization pulse shaper with a polarizer and employ two linear spectral phase masks to mimic an ultrastable common-path interferometer. In an all-optical experiment we study the interference signal resulting from two temporally delayed pulses. Our results show a 2σ-precision of 300 zs = 300 × 10(-21) s in pulse-to-pulse delay. The standard deviation of the mean is 11 zs. The obtained precision corresponds to a variation of the arm's length in conventional delay stage based interferometers of 0.45 Å. We apply these precisely generated pulse pairs to a strong-field quantum control experiment. Coherent control of ultrafast electron dynamics via photon locking by temporal phase discontinuities on a few attosecond timescale is demonstrated.
我们通过脉冲整形技术研究了超短激光脉冲对产生过程中的时间精度。为此，我们将飞秒偏振脉冲整形器与偏振器相结合，并使用两个线性光谱相位掩模来模拟一个超稳定的共光路干涉仪。在一个全光实验中，我们研究了两个时间延迟脉冲产生的干涉信号。我们的结果表明，脉冲间延迟的2σ精度为300 zeptoseconds（300×10⁻²¹秒）。平均值的标准偏差为11 zeptoseconds。所获得的精度相当于基于传统延迟阶段的干涉仪中臂长变化0.45埃。我们将这些精确产生的脉冲对应用于一个强场量子控制实验。展示了通过在几个阿秒时间尺度上的时间相位不连续性进行光子锁定，对超快电子动力学进行相干控制。
