Scattering of electromagnetic pulses by metal nanospheres in the vicinity of a Fano-like resonance

Two-photon excitation of atoms by ultrashort electromagnetic pulses in a discrete spectrum

“…In the latter work it was shown in particular that ionization of an atom by an intense single-cycle cosine pulse is much more efficient than under the action of a sine pulse.In the paper [12], within the framework of the perturbation theory the formula was obtained that describes the total probability of single-photon absorption of an USP (during all time of its action) in terms of the spectral cross-section of photoabsorption and the Fourier transform of the strength of the electric field in a pulse. The expression derived in the work [12] was widely used further for analysis of single-photon absorption and spontaneous scattering by various targets [13][14][15].The present work is dedicated to the theoretical analysis of two-photon excitation of atoms in a discrete energy spectrum by ultrashort electromagnetic pulses of femto-and…”

“…In the paper [12], within the framework of the perturbation theory the formula was obtained that describes the total probability of single-photon absorption of an USP (during all time of its action) in terms of the spectral cross-section of photoabsorption and the Fourier transform of the strength of the electric field in a pulse. The expression derived in the work [12] was widely used further for analysis of single-photon absorption and spontaneous scattering by various targets [13][14][15].…”