ELECTRIC-FIELD EFFECTS ON PERSISTENT SPECTRAL HOLES - PERYLENE IN THE SHPOLSKII MATRIX NORMAL-HEPTANE

Upon application of an electric field the spectral holes burned in different lines of the Shpol'skii multiplet of the centrosymmetric molecule perylene in the non-polar matrix n-heptane were splitted in two components, while the holes in the continuous background between the lines were broadened. The splitting and broadening were found to increase linearly with the electric field strength. The experimental results are discussed in terms of electric-field-induced variations of the gas-to-matrix shift of the electronic levels of perylene, which is caused by the dispersion interaction.