电子动力学及相干辐射的强场调控与阿秒探测——强场与阿秒物理领域中的重大课题研究进展

电子动力学及相干辐射的强场调控与阿秒探测是强场物理与阿秒物理领域中的重大课题。通过同步探测阿秒辐射和太赫兹辐射，文章作者首次实现了阿秒精度的太赫兹产生动力学的探测与控制，表明阿秒物理与太赫兹技术的结合有助于深入理解强场驱动下太赫兹产生机制和电子再散射动力学，展示了利用双色场控制电子波包相干相位，实现超快物理过程强场调控的可能。文章作者所提出的精确刻画太赫兹时域瞬时电场方案，有助于推动极化敏感的太赫兹谱学研究。可以预期，阿秒脉冲与太赫兹源技术不会局限于原子分子物理领域。实现阿秒物理与太赫兹技术之间的互为抽运与探测，将会极大地推动化学、材料科学、凝聚态物理等领域的高时空分辨的超快动力学探测。

Strong-field control and ultrafast detection of electron dynamics and coherent radiation towards attosecond physics

The control and ultrafast detection of electron dynamics and coherent radiation are among the key questions that may be addressed by strong field physics and attosecond physics.By marrying the best of two worlds, i.e. attosecond science and THz technology, we have demonstrated that by synchronizing attosecond radiation with THz wave emission we may obtain a deeper understanding of the mechanism of THz generation as well as more insight into the rescattering electron dynamics following tunneling ionization. It indicates that ultrafast dynamics within strong fields can be coherently controlled through gating the propagation of electron wave packet using two-color laser pulses. In addition, we propose and verify a new scheme to measure both the amplitude and polarization of the THz field in the time domain, which could promote various applications of polarization-sensitive THz spectroscopy. The technology of blending THz sources and attosecond pulses is expected to go beyond atomic and molecular physics, with significant impact on,for example, the study of carrier dynamics in solids using pump-probe schemes, where the dynamics can only be initiated efficiently by THz sources while the probing requires high spatiotemporal resolution.