Femtosecond dephasing in a polydiacetylene film measured by degenerate four-wave mixing with an incoherent nanosecond laser

✍ Scribed by Toshiaki Hattori; Takayoshi Kobayashi

• Book ID: 103023429
• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 477 KB
• Volume: 133
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(87)87056-2

✦ Synopsis

Dephasing times m a polydiacetylene (poly-3BCMU) film were resolved for the first time at two wavelengths by degenerate four-wave mixing using incoherent light. The dephasing times, 30 fs at 648 nm and 130 fs at 582 nm, correspond to excitons in chains of the polymer with different conjugation lengths.