Optical ringing in solids: The observation of optical coherence and resonance decay from selectively prepared molecular packets in molecular crystals

✍ Scribed by A.H. Zewail; T.E. Orlowski

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 635 KB
• Volume: 45
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(77)80047-x

✦ Synopsis

The optical ringing and the incoherent resonance decay of electronically excited (resolution = lo4 cm-r) soiids is observed using the technique of single-mode laser spectroscopy (SLS). The results show that localized states of pentacene in p-terphenyl, at 1.7 K, have a definite phase memory that can be destroyed only above 3 k due to the increased phonon population. Moreover, the optical coherence of the 0,O origin (at 16 882 cm-') gives a homogeneous tinewidth of 40 MHz which is approximately l/100 the width of the vrbronic origin, and orders of magnitude less than the "apparent" width of the resonance. * Supported in part by the Sloan Fund. * Contribution No. 5420.