Fig. 3: Scattering characteristics of the triple-layer model.
From: Amplifying time-harmonic thermal signal in spinning lock-in thermography
Here \(\omega =\frac{{{\rm{\pi }}}}{4}\) rad s−1. The rotation direction of the target is defined such that \({\Omega }_{i}\)(\(i\) = 1, 2) is positive when the rotation is clockwise, and negative when the rotation is counterclockwise. The four plots correspond to the modulus of the scattering elements. a \({S}_{11}\), b \({S}_{12}\), c \({S}_{21}\) and d \({S}_{22}\).
