Work

Producing keV photoelectrons from one-dimensional stretched H2+ by near-infrared intense chirped laser fields

Year: 2025

Type: article

Abstract: We theoretically present a method for producing keV high-order above-threshold ionization (HATI) electrons from one-dimensional stretched H 2 + in near-infrared (NIR) intense chirped laser fields by solving the time-dependent Schrödinger equation in momentum space. We find that the photoelectron energy can only be extended to 18U p if the stretched H 2 + is driven by a chirp-free laser pulse, with U p being the ponderomotive energy. However, the cutoff position of the HATI plateau sensitively depends on the chirp rate, intensity and wavelength of laser pulses and the highest photoelectron energy can reach up to 46U p (i.e., 2.577 keV) when the stretched H 2 + is exposed to NIR intense chirped laser fields. Based on the classical analysis method, we confirm that the dramatic extension of photoelectron energy can be attributed to the well-known fact that the released electron from one proton (i.e., A or B) is elastically scattered by the neighboring proton (i.e., B or A). This work demonstrates the possibility for producing keV photoelectrons using table-top NIR intense chirped laser fields.

Source: Optics Express

DOI: 10.1364/oe.559936

Authors: Na Wang, Wen-Quan Jing, Jin-Xu Du, Zhi-Hong Jiao, Guo-Li Wang, Song-Feng Zhao

Institution: Central South University

Language: English

Topic: Laser-Matter Interactions and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: National Natural Science Foundation of China