Optical Stark shifts of Raman gain spectra in polydiacetylene

S. D. Halle, M. Yoshizawa, H. Matsuda, S. Okada, H. Nakanishi, T. Kobayashi

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We report that the stimulated Raman gain signals of a single-crystal polydiacetylene with the side groups2, 5-bis-trifluoromethyl-phenyl, PDA-DFMP, exhibit an optical Stark shift of ==50 cm-1. Using an ultrashort, near-resonant high-intensity laser, we find that te intensity-dependent signal shifts to higher probe photonenergies for both the C=C- and C=C-stretching modes. Semiquantitative agreement between the dataand a three-level-system density-matrix calculation is achieved with a nonlinear-optical mechanism in whicha pump-laser field is optically coupled to both the exciton ← zero-phonon ground-state and the excit←ononephonon ground-state transitions.

Original languageEnglish
Pages (from-to)731-736
Number of pages6
JournalJournal of the Optical Society of America B: Optical Physics
Issue number5
Publication statusPublished - 1994 May


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