Diffractive arrays of gold nanoparticles near an interface: critical role of the substrate

Details Diffractive arrays of gold nanoparticles near an interface: critical role of the substrate Diffractive arrays of gold nanoparticles near an interface: critical role of the substrate

2010-07-26

arxiv.org/abs/1007.4428v2

Physics

Optics

Scientific paper

The optical properties of periodic arrays of plasmonic nanoantennas are strongly affected by coherent multiple scattering in the plane of the array, which leads to sharp spectral resonances in both transmission and reflection when the wavelength is commensurate with the period. We demonstrate that the presence of a substrate (i.e., an asymmetric refractive-index environment) can inhibit long-range coupling between the particles and suppress lattice resonances, in agreement with recent experimental results. We find the substrate-to-superstrate index contrast and the distance between the array and the interface to be critical parameters determining the strength of diffractive coupling. Our rigorous electromagnetic simulations are well reproduced by a simple analytical model. These findings are important in the design of periodic structures and in the assessment of their optical resonances for potential use in sensing and other photonic technologies.

Affiliated with

Also associated with

No associations

Rating

Diffractive arrays of gold nanoparticles near an interface: critical role of the substrate does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Diffractive arrays of gold nanoparticles near an interface: critical role of the substrate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diffractive arrays of gold nanoparticles near an interface: critical role of the substrate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-558742