Spectral hole burning in semicrystalline polymers between 0.3 and 4.2 K

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Abstract
Optical dephasing in the S1←S0 0–0 transitions of organic guest molecules in semicrystalline polyethylene hosts has been studied via hole burning from 0.3 to 4.2 K and compared to amorphous systems. In contrast to the latter, a temperature dependence of the homogeneous linewidth much steeper than T1.3 was found, which approaches that of crystalline materials and varies with the degree of crystallinity of the polymer. Parameters which fit the equations of specific theoretical models to the experimental data are calculated.