Optical dephasing in organic glasses between 0.3 and 20 K. A hole-burning study of resorufin and free-base porphin

✍ Scribed by R. Van Den Berg; A. Visser; S. Völker

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 790 KB
• Volume: 144
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(88)87099-4

✦ Synopsis

Spectral holes have been burnt in the S, Go O-O transition of resorufin in polymethylmethacrylate (PMMA) and glycerol, and of free-base porphin (H,P) in PMMA and polyethylene (PE). The holewidths follow a T 'J dependence over almost two orders of magnitude in temperature and extrapolate to the fluorescence lifetime-limited value of each guest when T-0. The discrepancy between the holewidths of resorufin in glycerol presented here and those reported in the literature are attributed to burning fluences. Photon-echo and hole-burning results are compared. Optical dephasing data are interpreted in terms of low-frequency localized phonon modes and are critically discussed.