Figure 3
From: Terahertz emission from gold nanorods irradiated by ultrashort laser pulses of different wavelengths
Reflection geometry, excitation at 800 nm. (a) Time-domain waveforms and (b) corresponding amplitude spectra for different peak optical intensities. Each waveform is normalized to its maximum positive value. (c) Terahertz pulse energy as a function of the peak optical intensity. The curves for the InAs (111) surface are shown for comparison. In (c), the numbers indicate the slopes of the fitted lines in a log scale.
