Fig. 1. Pump- probe system light path and spectral image of laser and sample absorption. (a) Schematic of pump-probe system; (b) laser spectrum in 450 to 950 nm range output from HCF system, the inset is pulse autocorrelation trace; (c) absorption spectrum of carbon nanotube sample, dashed line roughly identifies boundary between E11 and E22 energy levels

Fig. 2. Time-resolved transient absorption spectra and absorption curves of specific detection wavelengths and FT spectra of E11 levels of (6, 4) carbon nanotube. Time-resolved transient absorption spectra of E11 levels of (6, 4) carbon nanotube (a) under NB pumping and (b) under BB pumping; transient absorption dynamics probed at 900 nm (c) under NB pumping and (d) under BB pumping; (e)-(f) FT spectrum of vibrational curves

Fig. 3. FT power intensity as a function of probe wavelength in E11 level resonance absorption range of (6, 4) carbon nanotubes. (a) RBM; (b) GM

Fig. 4. M1(t) dynamics process and the relationship between the oscillating wave packet and the initial phase. M1(t) dynamics process (a) under NB pumping and (b) under BB pumping; schematic of the relationship between the vibrational wavepackets and their phases (c) in excited state and (d) in ground state