Figure 3
From: Super-resolved time–frequency measurements of coupled phonon dynamics in a 2D quantum material
Demonstration of SLT performance using test pulse series. (a) Test pulses with frequency components 2 THz, 1.8 THz, and 1.6 THz, are summed to generate the model signal in panel (b). Each pulse is 10 ps in duration and the 1.8 THz component has an additional pulse delayed in time by 0.5 ps from the end of the first pulse. This model signal will let us study the temporal and spectral resolution of the three techniques. The normalized STFT (c), CWT (d), and SLT (e) of the model signal are shown in the bottom panels from left to right. Lineouts (f) of each transform taken at 15 ps (denoted by the vertical white lines in the transforms) are shown in the bottom right panel. The additional structure present in the spectral lineout of the SLT demonstrates its improved spectral resolution. Colorbar indicates relative intensity (arb. units).
