Please use this identifier to cite or link to this item:
Bayesian Approach for the Optimal Control of High-order Harmonics for the Generation of Ultrashort Attosecond Laser Pulses
|Publication Year :||2021|
We present an efficient and powerful method to determine the high-order harmonic generation (HHG) of the helium atoms that are exposed to the combination of chirped two-color mid-IR laser field and its 34th harmonics. We extend the machine-learning based optimization method, called Bayesian optimization (BO), to optimize the incident laser pulse to generate ultrashort attosecond laser pulse successfully for the first time. It is shown that the intensity of HHG power spectrum from the plateau region to the cutoff is enhanced by the optimized laser field by several orders of magnitude. Further, an ultrashort isolated attosecond pulse can be generated efficiently by superposing the plateau harmonics. The time-dependent Schrödinger equation is solved accurately and efficiently by means of the time-dependent generalized pseudospectral method and the time-frequency spectrum is obtained by the wavelet transform.
|Appears in Collections:||物理學系|
Files in This Item:
|3.5 MB||Adobe PDF|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.