Title :
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
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;
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
DOI :
10.1109/MetaMaterials.2013.6808942
