Spectra of χ(3) (−3ω; ω, ω, ω) in poly(2,5-dimethoxy p-phenylene vinylene) (MO-PPV) for various conversion levels
✍ Scribed by Takashi Kurihara; Yuhei Mori; Toshikuni Kaino; Hideyuki Murata; Noriyuki Takada; Tetsuo Tsutsui; Shogo Saito
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 426 KB
- Volume
- 183
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The x(') spectra of MO-PPV films for various conversion levels were measured for the first time. It has been demonstrated clearly that the intensities ofx r3) increase corresponding to elongation of n-conjugation lengths. Especially, xc3) increases significantly at the final conversion level in which long rigid r-conjugated sequences are formed. The corrected xr') value reaches 1.6x lo-lo esu where the three-photon resonance seemed to play an important role. It is predicted that there is a certain dominant resonant level effective to large x0) , which is possibly resulted from the distribution of a long rigid rc-conjugation.