DYNAMICS OF ELECTRON EXCITATIONS IN DENSELY PACKED PLASMONIC Ag/Na3AlF6 NANOSTRUCTURES UNDER PULSED LASER ACTION

作者：Buganov O V; Zamkovets A D^*; Ponyavina A N; Tikhomirov S A; Baran L V

来源：Journal of Applied Spectroscopy, 2011, 78(5): 686-691.

• ultrashort laser pulses
• dynamics of electron excitations
• densely packed nanostructures
• surface plasmon resonance

Differential transient absorption spectra have been studied for planar densely packed Ag/Na3AlF6 nanostructures under ultrashort laser pulse excitation. The nanostructures were fabricated by sequential thermal evaporation of cryolite (Na3AlF6) and silver in vacuo onto glass and quartz substrates. A nonmonotonic variation in relaxation times of induced changes in a surface plasmon resonance band was observed with an increase in the metal surface density that resulted in nanoparticle size growth and structural modification of the densely packed layer. The tendency of the relaxation times to vary nonmonotonically is explained by both features of intrinsic size effects and electron-tunneling processes in plasmonic densely packed nanostructures of various topologies.

• 出版日期2011-11