Abstract
Temperature-dependent (2–10 K) photon echo measurements are presented for pentacene in naphthalene at high pressure (12.5 kbar) in a diamond anvil cell. A decrease in the homogeneous dephasing rate (i.e. a narrowing of the homogeneous linewidth) is observed at high pressure. In addition, the temperature dependence of the homogeneous dephasing rate is used to obtain the effect of pressure on the frequency and lifetime of the pseudolocal phonon associated with a pentacene impurity in a crystalline naphthalene matrix.
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