We have studied the relaxation dynamics for hot electrons in hybrid layered nanocomposites based on island films of silver and copper phthalocyanine. Using femtosecond kinetic spectroscopy, we have shown that the fast component of the bleaching relaxation kinetics in the spectral region corresponding to the absorption bands of copper phthalocyanine correlates with the recovery kinetics for surface plasmon resonance absorption of the silver nanoparticles. This suggests that the fast relaxing bleaching recorded in the absorption bands of copper phthalocyanine and its dynamics are not due to a change in the populations of the energy states of copper phthalocyanine but rather to a change in the state of the plasmon nanoparticles, as a result of their excitation by femtosecond pulses and subsequent relaxation.
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*Report given at the Fourth Physics Congress of Belarus, 24–26 April 2013, Minsk.
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 81, No. 1, pp. 93–98, January–February, 2014.
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Buganov, O.V., Zamkovets, A.D., Ponyavina, A.N. et al. Plasmon-Related Modification of Spectral Kinetic Properties of Copper Phthalocyanine Thin Films in the Presence of Silver Nanoparticles* . J Appl Spectrosc 81, 92–96 (2014). https://doi.org/10.1007/s10812-014-9892-y
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DOI: https://doi.org/10.1007/s10812-014-9892-y