Fig. 4: Time-resolved terahertz field dynamics via wavelet analysis. | Light: Science & Applications

Fig. 4: Time-resolved terahertz field dynamics via wavelet analysis.

From: Manipulating terahertz phonon-polariton in the ultrastrong coupling regime with bound states in the continuum

Fig. 4

a Time-evolved spectrum was obtained through the wavelet transform method with \(d\) = 16 μm, \(d\) = 2 μm. b Time-frequency domain maps of the regions \(d\) = 16 μm and 2 μm after background removal within the orange dashed boxes. Time evolution of (c) intensity and (d) phase of the terahertz field at \({\omega }_{{\rm{Ph}}}\) = 0.95 THz for different \(d\) parameters

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