(color online) The amplitudes of the n-th current burst with the laser wavelengths (black squares), 800 nm (red circles), and 1600 nm (green triangles) for the given laser intensity of and pulse duration of τ = 50 fs. The position of these symbols corresponds to the time of the ionization event, and the number increases with the increase of the laser wavelength. Inset shows the total current amplitudes for the three wavelength lasers.