Wuhan National Laboratory for Optoelectronics and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China.
HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100084, China.
Phys Rev Lett. 2018 Jun 1;120(22):223203. doi: 10.1103/PhysRevLett.120.223203.
A photon channel perspective on high harmonic generation (HHG) is proposed by quantizing both the driving laser and high harmonics. It is shown that the HHG yield can be expressed as a sum of the contribution of all the photon channels. From this perspective, the contribution of a specific photon channel follows a simple scaling law and the competition between the channels is well interpreted. Our prediction is shown to be in good agreement with the simulations by solving the time-dependent Schrödinger equation. It also can explain well the experimental results of the HHG in the noncollinear two-color field and bicicular laser field.
本文通过对驱动激光和高次谐波进行量子化，提出了一种光子通道的视角来看待高次谐波产生（HHG）。结果表明，HHG 的产生可以表示为所有光子通道贡献的总和。从这个角度来看，特定光子通道的贡献遵循简单的比例定律，并且可以很好地解释通道之间的竞争。我们的预测与通过求解含时薛定谔方程来模拟 HHG 的结果非常吻合。它还可以很好地解释非共线双色场和双圆激光场中的 HHG 实验结果。
