Selective vibrational excitation of polyatomic molecules by stimulated emission pumping: The 523O2 level (εvib = 2036 cm−1) of p-difluorobenzene

Abstract
The method of stimulated emission pumping (SEP) is used to populate excited vibrational level (εvib = 2036 cm−1) in the ground state of a medium‐sized polyatomic molecule, namely p‐diflurobernzene. The state specificity of the SEP process is demonstrated by generating single vibronic level (SVL) fluorescence from an S1 level (302) via absorption from the SEP‐prepared level, 523O2. The wavelength resolved SEP‐SVLF fluorescence spectrum establishes the integrity of the prepared S0 level and provides a means for monitoring its population dynamics.