Figure 4
From: Plane photoacoustic wave generation in liquid water using irradiation of terahertz pulses
Quantitative analysis of photoacoustic waves. (A) Speed of the photoacoustic waves as functions of depth for different THz frequencies and THz micropulse energies. The Fourier transform was calculated at a depth of z ± 0.5 mm. (B) Amplitude of the photoacoustic wave as a function of the product of the absorption coefficient, α, and the radiant exposure, F, of the THz light. The red line is the fitting of \(p \propto \alpha F\).
