Skip to main content
. Author manuscript; available in PMC: 2006 Apr 21.
Published in final edited form as: J Phys Chem A. 2004 Jul 15;108(28):5921–5925. doi: 10.1021/jp0482971

Figure 2.

Figure 2.

Subtraction procedure used to obtain time-resolved femto-second stimulated Raman spectra (FSRS) of β-carotene. A raw S2spectrum at +50 fs (D) is obtained by 1:1 subtraction of the solvent spectrum (B) and a scaled ground-state β-carotene spectrum (0.8*C) from the raw data (A). The resulting spectrum contains both Raman features as well as a background due to the near-infrared absorption of S2. The entire spectrum (black) is fit to a sum (indicated in gray) of Gaussian peaks and a fifth-order polynomial baseline (E) which is then subtracted to obtain a Raman spectrum of the second excited singlet state of β-carotene (F).