Description:
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This paper discusses the excitation processes of a dye doped into an amorphous material as studied by using the photochemical hole-burning (PHB) technique. Our system is sulfonated tetraphenylporphin doped into poly(vinyl alcohol). The observed data were the extents of laser-induced hole filling (LIHF) in PHB at 20 K for wavelengths longer than the wavelength of the newly burned hole. Quantitative analysis using the least-squares method showed that the measured extents of LIHF can be explained by system parameters expressing non-site-selective excitations: the Debye-Waller factor, the energy of lattice vibrational excitation accompanied by the purely electronic excitation, and other parameters related to two kinds of vibronic excitations.
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