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Published February 1, 1977 | public
Journal Article

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

Abstract

The optical ringing and the incoherent resonance decay of electronically excited (resolution ≈ 10^(−4) cm^(−1)) solids 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, 0 origin (at 16 882 cm^(−1)) gives a homogeneous linewidth of 40 MHz which is approximately 1100 the width of the vibronic origin, and orders of magnitude less than the "apparent" width of the resonance.

Additional Information

© 1977 Elsevier B.V. Received 15 October 1976. Supported in part by the Sloan Fund. Contribution No. 5420. We wish to thank Dr. A. Marchetti for providing us with the mixed crystals. The help of D. Dawson, D. Smith, and R. Mead in these experiments is greatly appreciated. We also wish to thank the National Science Foundation (Grant No. MPS-573-04613) for partial support of this work.

Additional details

Created:
August 19, 2023
Modified:
October 20, 2023