Two-center interference and stereo Wigner time delay in photoionization of asymmetric molecules
Year: 2021
Type: article
Abstract: We present numerical simulations of the time delay in photoemission of asymmetric diatomic molecules using the technique of reconstruction of attosecond beating by interference of two-photon transitions (RABITT) by solving the time-dependent Schr\"odinger equation. Our results show an obvious time delay between photoelectrons emitted to the left and right and this relative time delay oscillates as the photoelectron energy changes. More interestingly, the amplitude of this oscillation increases when the asymmetry degree of diatomic molecules decreases. With the method of the selected continuum wave functions, we calculate the Wigner time delay in photoionization. The obtained stereo Wigner time delay also oscillates with photoelectron energy. This oscillation is traced back to two-center interferences and it could explain the relative time delay in the RABITT measurement. Furthermore, our results indicate that the continuum-continuum time delay in photoemission of heteronuclear molecules is asymmetric.
Source: Physical Review A
Institutions: Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, University of Chinese Academy of Sciences, State Key Laboratory of Transient Optics and Photonics, Wuhan Institute of Technology
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W3183828126