Influence of laser pulse shape and spectral composition on strong-field Kapitza-Dirac scattering

23rd International Laser Physics Workshop

Dellweg, Matthias M.^1 ; Müller, Carsten^1

Institut für Theoretische Physik i, Heinrich-Heine-Universität, Düsseldorf

40225, Germany^1

关键词: Bragg conditions;    Diffractive scattering;    Dinger equation;    Frequency modes;    Quantum-mechanical interference;    Rabi oscillations;    Relative phase;    Spectral composition;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/594/1/012015/pdf
DOI  :  10.1088/1742-6596/594/1/012015

来源: IOP

【 摘 要 】

Diffractive scattering of an electron beam from an intense standing wave of light (Kapitza-Dirac effect) is analyzed theoretically. The corresponding Schrödinger equation is solved in the Bragg regime by combined analytical and numerical means. Our goals are twofold: On the one hand, we examine the influence of the nature of the field's turning- on phase and demonstrate that a smooth, adiabatic envelope restricts the transitions to those satisfying the Bragg condition. On the other hand, we study signatures of quantum mechanical interference when the standing light wave comprises two commensurate frequencies. Characteristic modifications of the Rabi oscillation dynamics and a dependence on the relative phase between the frequency modes are revealed.