METALLIC NANOTUBES CHARACTERIZATION VIA SURFACE PLASMON EXCITATION

ABRAHAM RICARDO MARTÍN; LESTER MARCELO FABIÁN; SCAFFARDI LUCÍA; SCHINCA DANIEL

PLASMONICS

SPRINGER

Lugar: Berlin; Año: 2011 vol. 6 p. 435 - 444

1557-1955

In this work, we show theoretical results of 2 the behaviour of the extinction cross section as a func3the behaviour of the extinction cross section as a func3 tion of the incident wavelength for metallic nanotubes 4 (Nts) with a 2D core?shell structure. To calculate the(Nts) with a 2D core?shell structure. To calculate the 5 optical response of the gold, silver and cooper sys6optical response of the gold, silver and cooper sys6 tem, an exact integral formalism is implemented. The 7 method is based on Green?s integral theorem, and itmethod is based on Green?s integral theorem, and it 8 allows us to compute the electromagnetic field at anyallows us to compute the electromagnetic field at any 9 point in space. For a correct description of the constitu10point in space. For a correct description of the constitu10 tive parameters of themetallic shell, we introduce a cor1111 rective model for the dielectric function in terms of the 12 shell thickness in the range 1 to 10 nm. In particular, weshell thickness in the range 1 to 10 nm. In particular, we 13 investigate the features of surface plasmons in metallic Nts, and in the cases of Au and Cu, the mechanisms 1414 of the interband transitions play a relevant role. In 1515 this paper, we show that a quasi-static approach is not 1616 sufficient to account the plasmon?plasmon interaction 1717 in Ag Nts. The aim of these studies is to characterize 1818 core size and shell thicknesses of the Nts by means of 1919 the surface plasmon resonance observed in the far field. 2020investigate the features of surface plasmons in metallic Nts, and in the cases of Au and Cu, the mechanisms 1414 of the interband transitions play a relevant role. In 1515 this paper, we show that a quasi-static approach is not 1616 sufficient to account the plasmon?plasmon interaction 1717 in Ag Nts. The aim of these studies is to characterize 1818 core size and shell thicknesses of the Nts by means of 1919 the surface plasmon resonance observed in the far field. 2020