| Popis: |
An experimental CARS set-up for resonant solid-state coherent spectroscopy is described. Resonance CARS spectra of one unsymmetrically (TS/FBS) and two symmetrically (TS6, FBS) substituted diacetylene monomer single crystals, with a low content of polymer, were obtained with this apparatus. Particularly, spectra of the C=C and the C≡C stretching vibrations of the polymer chains, recorded for different pump laser frequencies, were investigated. The occurrence of broad spectral CARS features which are non-resonant and Stokes shifted relative to other observed CARS lines is discussed |
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