Ionization-detected Raman studies of the 1600 cm−1 Fermi dyad of benzene

Abstract
We present the first rotationally resolved Raman spectrum of a degenerate rovibrational transition in benzene as a demonstration of the high spectral resolving power and sensitivity attainable by ionization detected stimulated Raman spectroscopy (IDSRS). The double-resonance form of the technique allows the clean separation of the Raman spectra of the Fermi dyad composed of the ν16 fundamental and ν2+ν18 combination vibrations.