Abstract-Effects of nuclear motion on the ionization-induced terahertz radiation of H2+ in intense few-cycle laser pulses

Shan Xue, Hongchuan Du, Yue Xia, and Bitao Hu

Phys. Rev. A 92, 013420 – Published 22 July 2015

http://journals.aps.org/pra/abstract/10.1103/PhysRevA.92.013420

We examine the residual current to investigate the conversion efficiency from the few-cycle laser pulse into the terahertz radiation of H2+ by solving the time-dependent Schrödinger equation in the non-Born-Oppenheimer approach. It is found that the nuclear motion and high vibrational states will improve the optical-to-terahertz conversion efficiency significantly, while with the increasing of the laser intensity, ionization saturation will suppress the effects of moving nuclei. Moreover, based on the dependence of the residual current on the delay time of the nuclear vibration, we conclude that the terahertz signal may serve as a tool to probe the nuclear dynamics.

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