Topics in Current Chemistry (2018) 376:35
1 3
Fig. 10 Disentanglement of real molecular vibrational bands from polarization interferences depicted for
a, b Rh-B and for c, d S-9 in methanol. The disentanglement is possible by comparing the maximum of
a given frequency in respect to τ 12 when the excitation chirp (ϕ″) is varied. By using positively chirped
(ϕ″ > 0) DFWM pulses, oscillatory contributions due to polarization beating will appear for slightly
delayed pump and Stokes pulses (τ 12 > 0), while real molecular vibrational bands will not be shifted in τ 12
in comparison to the non-chirped excitation (ϕ″ = 0). While for Rh-B (a, b), several frequencies can be
assigned to molecular modes, in particular at 205 and 620 cm
−1 , for S-9 (c, d), only two weak contributions at about 505 and 555 cm
−1 are real molecular vibrational normal modes Reprinted from Ref. [20]
with the permission of AIP Publishing
Fig. 11 Scheme of the population-controlled pump-IVS; a experimental setup and b pulse chopping scheme. By chopping all pulses but the probe pulse, it is possible to extract the pure signal of the
excited state S 1 in this scheme Reprinted from Ref. [77] with permission of ACS https ://pubs.acs.org/doi/
abs/10.1021%2Fjp5 07586 3
224
Reprinted from the journal
1 3
Fig. 10 Disentanglement of real molecular vibrational bands from polarization interferences depicted for
a, b Rh-B and for c, d S-9 in methanol. The disentanglement is possible by comparing the maximum of
a given frequency in respect to τ 12 when the excitation chirp (ϕ″) is varied. By using positively chirped
(ϕ″ > 0) DFWM pulses, oscillatory contributions due to polarization beating will appear for slightly
delayed pump and Stokes pulses (τ 12 > 0), while real molecular vibrational bands will not be shifted in τ 12
in comparison to the non-chirped excitation (ϕ″ = 0). While for Rh-B (a, b), several frequencies can be
assigned to molecular modes, in particular at 205 and 620 cm
−1 , for S-9 (c, d), only two weak contributions at about 505 and 555 cm
−1 are real molecular vibrational normal modes Reprinted from Ref. [20]
with the permission of AIP Publishing
Fig. 11 Scheme of the population-controlled pump-IVS; a experimental setup and b pulse chopping scheme. By chopping all pulses but the probe pulse, it is possible to extract the pure signal of the
excited state S 1 in this scheme Reprinted from Ref. [77] with permission of ACS https ://pubs.acs.org/doi/
abs/10.1021%2Fjp5 07586 3
224
Reprinted from the journal