Abstract
Based on the occurrence of extremely narrow zero phonon lines and their inhomogeneous distribution spectroscopic isolation of single absorbers in solid matrices can be achieved. Pentacene molecules in a p-terphenyl host crystal have been studied at cryogenic temperatures using absorption [1] and fluorescence excitation [2,3] techniques. Such investigations provide information on a variety of guest host properties such as homogeneous dephasing, spectral diffusion [3] and inhomogeneous broadening. Single molecule detection also is a key to the investigations of fundamental spectroscopic properties of individual molecules.
© 1992 Optical Society of America
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