TY - JOUR

T1 - Velocity map imaging of scattering dynamics in orthogonal two-color fields

AU - Würzler, D.

AU - Eicke, Nicolas

AU - Möller, Malte

AU - Seipt, D.

AU - Sayler, A. Max

AU - Fritzsche, S.

AU - Lein, Manfred

AU - Paulus, Gerhard G.

N1 - Funding Information: This work was supported by grant PA730/4 and FR 1251/ 17-1 within the Priority Programme ‘Quantum Dynamics in Tailored Intense Fields (QUTIF)’ of the German Research Foundation (DFG).

PY - 2018/1/14

Y1 - 2018/1/14

N2 - In strong-field ionization processes, two-color laser fields are frequently used for controlling sub-cycle electron dynamics via the relative phase of the laser fields. Here we apply this technique to velocity map imaging spectroscopy using an unconventional orientation with the polarization of the ionizing laser field perpendicular to the detector surface and the steering field parallel to it. This geometry allows not only to image the phase-dependent photoelectron momentum distribution (PMD) of low-energy electrons that interact only weakly with the ion (direct electrons), but also to investigate the low yield of higher-energy rescattered electrons. Phase-dependent measurements of the PMD of neon and xenon demonstrate control over direct and rescattered electrons. The results are compared with semi-classical calculations in three dimensions including elastic scattering at different orders of return and with solutions of the three-dimensional time-dependent Schrödinger equation.

AB - In strong-field ionization processes, two-color laser fields are frequently used for controlling sub-cycle electron dynamics via the relative phase of the laser fields. Here we apply this technique to velocity map imaging spectroscopy using an unconventional orientation with the polarization of the ionizing laser field perpendicular to the detector surface and the steering field parallel to it. This geometry allows not only to image the phase-dependent photoelectron momentum distribution (PMD) of low-energy electrons that interact only weakly with the ion (direct electrons), but also to investigate the low yield of higher-energy rescattered electrons. Phase-dependent measurements of the PMD of neon and xenon demonstrate control over direct and rescattered electrons. The results are compared with semi-classical calculations in three dimensions including elastic scattering at different orders of return and with solutions of the three-dimensional time-dependent Schrödinger equation.

KW - elastic scattering for multiple electron returns

KW - orthogonal two-color laser fields

KW - phase-dependent photoelectron momentum distribution

KW - semi-classical calculations in three dimensions

KW - strong-field ionization

KW - three-dimensional time-dependent Schrodinger equation

KW - velocity map imaging spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=85038637289&partnerID=8YFLogxK

U2 - 10.1088/1361-6455/aa975c

DO - 10.1088/1361-6455/aa975c

M3 - Article

AN - SCOPUS:85038637289

VL - 51

JO - Journal of Physics B: Atomic, Molecular and Optical Physics

JF - Journal of Physics B: Atomic, Molecular and Optical Physics

SN - 0953-4075

IS - 1

M1 - 015001

ER -