# RAMAN SPECTRA IN THE ELECTRONIC EXCITED STATE: CARS OF LASING RHODAMINE

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 Title: RAMAN SPECTRA IN THE ELECTRONIC EXCITED STATE: CARS OF LASING RHODAMINE Creators: Devlin, J. Paul; Rockley, Mark G. Issue Date: 1978 Publisher: Ohio State University Abstract: By choosing $\omega_{2}$ (4880 {\AA}) preresonant with the $S_{1}-S_{0}$ transition of rhodamine 6G, and $\omega_{1}$ (4537 {\AA}) resonant with the $S_{2}-S_{1}$ absorption, the resonant CARS spectra for lasing rhodamine 6G in methanol, ethanol and acetonitrile have been observed in the $1500 - 1650\;cm^{-1}$0 range. Strong positive bands, attributed to CARS from the $S_{1}$ state, replace the negative ground state preresonant bands as the $S_{0}$ state saturates at high laser beam power densities. A water solution behaves quite differently, possibly as a result of strong association of water with rhodamine in the excited state. Description: Author Institution: Department of Chemistry, Oklahoma State University URI: http://hdl.handle.net/1811/10487 Other Identifiers: 1978-RC-11