Tuning of plasmonic behaviours in coupled metallic nanotube arrays

Abstract

, and Xia Hui( ) a) †

Formation and Evolution Mechanism of Plasmon Resonance from Single Ring‐Shaped Nanotube to Dimer and Arrays

“…In addition, Figure 4 Figure 4(f) for A3 show the quadrupole resonance; the electric field distributes nearly outside of the tube, and we could barely see the electric field inner of the tube. The signs of the surface charges at two sides of the gap are opposite; the electric fields between two nanotubes are coupled together closely and intensified, which is just in analogy with a simple capacity device, so the field distributions are mostly concentrated at every other gap between adjacent nanotubes [24][25][26]. The results indicate that the oscillation of charge density exists between the nanotubes.…”

“…During transmission peak A that is the quadrupole resonant peak, the field distributions of only appear outside the nanotube. When separation distance is = 20 nm, similar to that of nanotube array [24][25][26], the opposing and uniform surface charges are aligned alternatively between the gap, so the field distributions are concentrated between adjacent nanotubes. As = 40 nm and 60 nm, the uniform surface charges are lessened due to less coupling between nanotubes.…”

“…In addition, arrays of nanostructures can also be used as optical waveguides [20][21][22]. Many efforts focused on the optical transmission properties of simple nanoparticles such as spherical particles and nanotube arrays [23][24][25][26][27][28].…”

Perforated nanocap array: Facile fabrication process and efficient surface enhanced Raman scattering with fluorescence suppression

“…[8] AAO template-based metal nanopore, [9] nanoparticle, [10][11][12] nanowire, [13] and nanocap [14] array SERS-active substrates have been reported. However, the local electromagnetic fields and SERS activities of those nanostructure arrays were mainly increased by gap effect [11][12][13][14][15][16] (also called inter-particle cou-pling effect), which displayed a mechanism significantly different from the reduced-symmetry effect. In this paper, we report on a facile fabrication process for forming imperforated and perforated silver nanocap arrays by using an AAO template-based approach.…”

Effects of a bar on optical transmission through Z-shaped metallic slit arrays

“…[10] Almost all of the parameters have been discussed to adjust the light transmission through slit arrays, such as the period of the slit array, [11,12] interface medium, [13,14] film thickness, [6] and so forth. [15][16][17][18] The influence of geometric parameters on the transmission through gold bent slit arrays with Z-shaped channels has also been discussed. It is found that the transmission of the metallic grating with a Z-shaped bent slit ar-ray behaves nearly the same as that with a straight slit array with identical slit length.…”