Optical properties of strongly coupled 2D trimer and 3D tetramer plasmonic structures

Author

Wei, Xiuqin ; Barrow, S. ; Funston, A.M. ; Mulvaney, P.

Author_Institution

Sch. of Chem., Univ. of Melbourne, Melbourne, VIC, Australia

fYear

2013

fDate

16-21 Sept. 2013

Firstpage

28

Lastpage

30

Abstract

We present DNA-directed self assembly of two-dimensional (2D) trimer and three-dimensional (3D) symmetric tetramer. Polarized scattering spectra are investigated to elucidate the coupled plasmon modes in each cluster, which are compared with Finite Element Method (FEM) modeling. We conclude that drastically enhanced local fields are produced within the interparticle gaps. Even interestingly, the symmetric clusters can exhibit polarization-independent characteristics, and Fano resonances are generated when the symmetry is broken.

Keywords

DNA; gold; light polarisation; light scattering; nanoparticles; nanophotonics; optical couplers; plasmonics; self-assembly; 2D trimer-3D tetramer plasmonic structure coupling; Au; DNA-directed self-assembly; FEM modeling; Fano resonances; finite element method; interparticle gaps; local field enhancement; polarized scattering spectra; symmetric clusters; Nanoparticles; Optical polarization; Optical scattering; Optical sensors; Plasmons; Three-dimensional displays;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), 2013 7th International Congress on

Conference_Location

Talence

Print_ISBN

978-1-4799-1229-2

Type

conf

DOI

10.1109/MetaMaterials.2013.6808942

Filename

6808942