On the optical properties of copper nanocubes as a function of the edge length as modeled by the discrete dipole approximation

Autor(es)

Alves, Tiago V. ^[1] ; Hermoso, Willian ^[1] ; Ornellas, Fernando R. ^[1] ; Camargo, Pedro H. C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, BR-05508000 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Chemical Physics Letters; v. 544, p. 64-69, AUG 20 2012.
• Citações Web of Science: 14

Resumo

This Letter reports an investigation on the optical properties of copper nanocubes as a function of size as modeled by the discrete dipole approximation. In the far-field, our results showed that the extinction resonances shifted from 595 to 670 nm as the size increased from 20 to 100 nm. Also, the highest optical efficiencies for absorption and scattering were obtained for nanocubes that were 60 and 100 nm in size, respectively. In the near-field, the electric-field amplitudes were investigated considering 514, 633 and 785 nm as the excitation wavelengths. The E-fields increased with size, being the highest at 633 nm. (c) 2012 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 11/06847-0 - Nanoestruturas polimetálicas contendo interiores vazios e tamanho, forma e composições definidas
• Beneficiário: Pedro Henrique Cury Camargo
• Modalidade de apoio: Auxílio à Pesquisa - Regular