Optical-phase relaxation at low temperature in the lowest 1B2u ← 1A1g transition of tetracene and pentacene in p-terphenyl

✍ Scribed by Thijs J. Aartsma; Jos Morsink; Douwe A. Wiersma

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 333 KB
• Volume: 47
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(77)85007-0

✦ Synopsis

Temperature dependent optical absorption experiments on the lowest 'B," + lAtg transition of tetracene in apterphenyl mixed crystal show that the loss of optical coherence is due to photon emission of the excited s*dte and phouon scattering of the ground state. The resonant phonon that induces the optical phase relaxation process is shown to be ofusymmetry and its lifetime is obtained from the previously reported photon-echo relaxation results. For pentacene in p-terphenyl it is concluded that phonon scattering in both the groand and excited state contributes to optical phase rekxatiorr-