Figure 6
From: Plane photoacoustic wave generation in liquid water using irradiation of terahertz pulses
THz-FEL-induced phenomena over a long time scale, with images of bubble formation and collapse induced by the THz pulse train shown in Fig. 2A with a frequency of 4 THz and an average micropulse energy of 18 μJ at delay times of (A) 150 μs, (B) 0.9 ms, (C) 1.8 ms, and (D) 15 ms. A series of images (E) to (H) shows the surface depression induced by the single THz pulse shown in Fig. 2B with a frequency of 5 THz. These images were taken with a time gate of 10 ns.
