TY - JOUR
KW - electric field
KW - excitation
KW - frequency
AU - J. Venzke
AU - Tennesse Joyce
AU - Z. Xue
AU - Andreas Becker
AU - Agnieszka Jaron-Becker
AB - We analyze the role of the difference between the central frequencies of the spectral distributions of the vector potential and the electric field of a short laser pulse. The frequency shift arises when the electric field is determined as the derivative of the vector potential to ensure that both quantities vanish at the beginning and end of the pulse. We derive an analytical estimate of the frequency shift and show how it affects various light induced processes, such as excitation, ionization, and high-harmonic generation. Since observables depend on the frequency spectrum of the electric field, the shift should be taken into account when setting the central frequency of the vector potential to avoid potential misinterpretation of numerical results for processes induced by few-cycle pulses.
BT - Physical Review A
DA - 2018-12
DO - 10.1103/PhysRevA.98.063409
N2 - We analyze the role of the difference between the central frequencies of the spectral distributions of the vector potential and the electric field of a short laser pulse. The frequency shift arises when the electric field is determined as the derivative of the vector potential to ensure that both quantities vanish at the beginning and end of the pulse. We derive an analytical estimate of the frequency shift and show how it affects various light induced processes, such as excitation, ionization, and high-harmonic generation. Since observables depend on the frequency spectrum of the electric field, the shift should be taken into account when setting the central frequency of the vector potential to avoid potential misinterpretation of numerical results for processes induced by few-cycle pulses.
PY - 2018
EP - 063409
T2 - Physical Review A
TI - Central frequency of few-cycle laser pulses in strong-field processes
UR - https://journals.aps.org/pra/abstract/10.1103/PhysRevA.98.063409
VL - 98
SN - 2469-9926
ER -