Abstract
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 language | English |
|---|---|
| Pages (from-to) | 731-736 |
| Number of pages | 6 |
| Journal | Journal of the Optical Society of America B: Optical Physics |
| Volume | 11 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1994 May |
ASJC Scopus subject areas
- Statistical and Nonlinear Physics
- Atomic and Molecular Physics, and Optics
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Halle, S. D., Yoshizawa, M., Matsuda, H., Okada, S., Nakanishi, H., & Kobayashi, T. (1994). Optical Stark shifts of Raman gain spectra in polydiacetylene. Journal of the Optical Society of America B: Optical Physics, 11(5), 731-736. https://doi.org/10.1364/JOSAB.11.000731