Zewail, A. H. and Harris, C. B. (1975) Coherence in electronically excited dimers. III. The observation of coherence in dimers using optically detected electron spin resonance in zero field and its relationship to coherence in one-dimensional excitons. Physical Review B, 11 (2). pp. 952-963. ISSN 0556-2805 http://resolver.caltech.edu/CaltechAUTHORS:ZEWprb75b
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The observation of coherent dimers in their excited triplet state is reported for a molecular crystal of 1,2,4,5-tetrachlorobenzene at low temperatures (below 4.2 K). Utilizing the theory developed in our previous paper, the coherence time (10^-6 sec) and the anisotropy of the resonance interactions in the excited state were established. The identification of the dimer as translationally equivalent, from the zero-field optically detected magnetic-resonance spectra, establishes the effective dispersion for the triplet exciton band of the neat crystal. Morover, the magnitude of the resonance transfer time was shown to be much less than the coherence time: the dimer is coherent for a period of 10^5 times that associated with the stochastic limit.
|Additional Information:||©1975 The American Physical Society Received 19 August 1974 This work was supported in part by the National Science Foundation and in part by the Inorganic Materials Research Division of Lawrence Berkeley Laboratory under the auspices of the U.S. Atomic Energy Commission.|
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|Deposited On:||12 Jun 2006|
|Last Modified:||26 Dec 2012 08:54|
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