Fig. 2. Ultrafast and fast excitation dynamics in LH2. (A and C) Broadband TA spectrum, T = 0 spectrum (orange: theory, black: experiment) and kinetics at three peak wavelengths (dashed: theory, full: experiment). The decay is caused by intraband relaxation and anisotropy decay. (B and D) Narrowband TA spectrum excited at 805 nm, T = 0 spectrum (orange: theory, black: experiment) and kinetics at three peak wavelengths (dashed: theory, full: experiment). The decay of the 803.7 nm peak and rise of the other two components reflects the transfer between the B800 → B850 rings.