Electromagnetic energy transport via linear chains of silver nanoparticles

Abstract

We propose the idea of a subwavelength-sized light guide represented by a linear chain of spherical metal nanoparticles in which light is transmitted by electrodynamic interparticle coupling. The light-transport properties of this system are investigated by use of model calculations based on generalized Mie theory. Considering Ag particles of 50-nm diameter, we find optimum guiding conditions for an interparticle spacing of 25 nm, and a corresponding 1/e signal-damping length of 900 nm is evaluated. The proposed principle of optical energy transport may be useful for subwavelength transmission lines within integrated optics circuits and for near-field optical microscopy.

Surface modes in plasmonic crystals induced by diffractive coupling of nanoantennas

“…2 Several studies have been carried out to investigate the interaction between nanoparticles arranged in one-dimensional ͑1D͒ and two-dimensional ͑2D͒ arrays. [3][4][5][6][7][8][9][10][11] Previous theoretical 9,10 and experimental 4,7,11 work has focused on mode propagation in 1D chains of coupled nanoparticles with a separation much smaller than the wavelength of light, or on arrays of nanoparticles on top of metallic surfaces coupled by surface-plasmon polaritons, 6 or on arrays of metallic nanostructures coupled by guided modes in dielectric waveguides. 5 In this Rapid Communication, we provide a detailed analysis of lattice surface modes on plasmonic crystals of nanoantennas.…”

Probing the out-of-plane optical response of plasmonic nanostructures using spectroscopic ellipsometry

“…[13][14][15] The ability to tailor the surface morphologies and their optical in-plane resonances has been investigated with both polarized absorption spectroscopy in transmission and reflectance anisotropy spectroscopy (RAS), showing a strong in-plane dichroic response. Such structures are of considerable interest as they can be used for plasmon waveguides 16,17 and enhancement effects. [18][19][20] This paper discusses the growth of Ag NP on stepped c-plane Al 2 O 3 substrates, characterized with both RAS and SE.…”

Effect of particle size on nonlinear refractive index of Au nanoparticle in PVA solution

“…Metal nanoparticles have been studied extensively because of their large third-order nonlinear susceptibilities and nonlinear optical response [2,3] and attractive for many applications such as electronic and optical devices [4], chemical and biological sensors [5][6][7][8], optical energy transport [9][10][11][12] and thermal therapy [13].…”