Figure 4
From: Super-resolved time–frequency measurements of coupled phonon dynamics in a 2D quantum material
Demonstration of SLT performance using real data taken with 0.081 mJ/cm2 pump fluence. (a–c) STFT, CWT, and SLT spectrograms, respectively. Lineouts were taken at 5 ps (d) and 8 ps (e) indicated by the vertical white lines in the spectrograms. Horizontal lines at 1.6, 1.8, 2, and 2.8 THz serve as a guide to the eye. The lineouts show that the SLT produces a narrower peak than either alternative, and provide better spectral resolution. The peak at 1.8 THz is not resolved by the CWT or STFT (blue, yellow, respectively), but is clearly present in the SLT lineout (red) at both 5 and 8 ps.
