Carrier envelope phase dependence of electron localization in the multicycle regime

Abstract

Thus far, the role of the carrier-envelope phase (CEP) of a light pulse has generally been demonstrated in the few-cycle (sub-10 fs) regime. Here, by simulating the molecular dynamics of H+ 2 and D+ 2, we report that the electron localization of H+ 2 and D+ 2 exhibits unexpectedly strong CEP dependence in the multicycle regime. Our results also demonstrate that the electron localization asymmetry in the multicycle regime (15-20 fs) is higher than that in the single-cycle (4 fs) pulse. This counterintuitive phenomenon is discussed by monitoring the motions of both nuclear and electronic wavepackets. © IOP Publishing and Deutsche Physikalische Gesellschaft.