This article is cited in 2 papers

Nanophotonics

Influence of silver nanoparticles on relaxation processes and efficiency of dipole-dipole energy transfer between dye molecules in polymethylmethacrylate films

V. V. Bryukhanov^a, E. I. Konstantinova^b, R. Yu. Borkunov^a, M. V. Tsarkov^a, V. A. Slezhkin<sup>b

a</sup> Immanuel Kant Baltic Federal University, Kaliningrad
^b Kaliningrad State Technical University

Abstract: The fluorescence and phosphorescence of dyes in thin polymethylmethacrylate (PMMA) films in the presence of ablated silver nanoparticles has been investigated in a wide temperature range by methods of femtosecond and picosecond laser photoexcitation. The fluorescence and phosphorescence times, as well as spectral and kinetic characteristics of rhodamine 6G (R6G) molecules in PMMA films are measured in a temperature range of 80–330 K. The temperature quenching activation energy of the fluorescence of R6G molecules in the presence of ablated silver nanoparticles is found. The vibrational relaxation rate of R6G in PMMA films is estimated, the efficiency of the dipole-dipole electron energy transfer between R6G and brilliant green molecules (enhanced by plasmonic interaction with ablated silver nanoparticles) is analysed, and the constants of this energy transfer are determined.

Keywords: ablation, silver nanoparticles, rhodamine 6G, polymethylmethacrylate films, dipole-dipole transfer, plasmon resonance, 'hot' fluorescence, femtosecond photoexcitation, low temperatures, b-relaxation.

PACS: 33.50.-j, 33.70.-w, 73.22.-f

Received: 24.02.2015
Revised: 12.04.2015

 English version: Quantum Electronics, 2015, 45:10, 908–913

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