Extended Data Fig. 6: Band selective Impulsive vibrational spectroscopy of TTM-TPA.
From: Decoupling excitons from high-frequency vibrations in organic molecules
a Temporal profile of the pulse P1 and P2 used in band selective experiment to excite charge transfer and local exciton-rich excited state respectively. b, Vibrational coherence generated after photo-excitation with P1 and P2 pulse for a representative probe window (680–700 nm). c,d, Wavelength-resolved impulsive Raman map (time-resolution corrected) of TTM-TPA following impulsive photo-excitation by c) the P2 pulse to the D2 rich state and d) the P1 pulse to the D1 state; The diagonal strips in the d, arise due to the interference scattering with the P1 pump. The fact that, the dominance of the high-frequency oscillations (time-period = 20–30 fs) is highly pronounced in the D2 state even after photo-excited with the slower pump pulse, strongly support the data and calculation presented in the Fig. 2.
