Figure 4

(a) Experimental data assisted by the fitted theoretical curve illustrating the derivative of the average temperature increase over the absorbed power versus distance from the focus z_L. Thermal conductivity (b) and interface conductance (c) values obtained in the first measurements assisted by the fit of the function describing exponential decay (y(x) = y₀ + e^−x/t). A rare but possible effect. The histograms of the values of κ (d) and g (e) extracted from 120 consecutive measurements in a typical situation, when sample retains its properties. The red line denotes the fit of the Gaussian function centered at κ_c or g_c and characterized by σ_κ or σ_g. The time of single measurement equals always 120 seconds.