Acta Optica Sinica, Volume. 36, Issue 3, 319002(2016)
Carrier Phase Determination for Few-Cycle Laser Pulses Based on Asymmetry of Ionized High-Energy Electrons
A method is proposed to determine the carrier envelope phase (CEP) for few-cycle laser pulses based on the asymmetry of the angular distributions of high- energy photoelectrons. The dependence of angular distributions of high-energy photoelectron for high-order above threshold ionization of helium in few-cycle laser pulses in the tunneling regime is investigated by using the second-order strong field approximation. By choosing the energy range in the photoelectron distributions appropriately, the dependence of the asymmetry parameter on the CEP can be obtained. Experimental results show that the change of the asymmetry parameter with the CEP obtained in the present work has the same trend with that from solving the time-dependent Schrodinger equation (TDSE). While in the TDSE calculations the contributions from the low energy photoelectrons are included, the asymmetry parameters obtained in the present work only account for the high-energy photoelectrons. Therefore, the proposed method provides a more convenient way for experimental determination of laser carrier phase.
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Tong Xiaogang, Wang Guoli, Zhou Xiaoxin, Chen Zhangjin. Carrier Phase Determination for Few-Cycle Laser Pulses Based on Asymmetry of Ionized High-Energy Electrons[J]. Acta Optica Sinica, 2016, 36(3): 319002
Category: Nonlinear Optics
Received: Aug. 28, 2015
Accepted: --
Published Online: Mar. 3, 2016
The Author Email: Xiaogang Tong (422209032@qq.com)