Surface plasmon resonance of metal nanoparticles sandwiched between dielectric layers: theoretical modelling

Abstract

Composite films consisting of a ceramic matrix with embedded metal nanoparticles have received increased interest due to their numerous potential applications in the field of optics and optoelectronics. Numerous studies have been dedicated to the fabrication of these composite materials and it has been shown that nanocermet films can be obtained by successive deposition of alternate dielectric and metal films of thicknesses opportunely chosen. In this case, stacks of dielectric layers alternated with layers of metal nanoclusters (NCs) are obtained. However, until now, optical characterization of these kinds of multilayer stack has been used to retrieve mainly qualitative information on the dimension, shape, and geometric distribution of nanoparticles inside the dielectric matrix. An easy-to-handle model that quantitatively links the optical properties to the main features of the NCs embedded in the matrix is presented. This model can be applied to multilayer stacks of dielectric layers alternated with metal NC layers and is shown to be a valid alternative to a recently published model [Nanotechnology 19, 125709 (2008)NNOTER0957-448410.1088/0957-4484/19/22/225302] that was applied to the case of a three-layer structure (dielectric/metal:dielectric/dielectric).

Effect of TEOS addition on formation of Au metal nano-particles in the Au-doped optical fiber and its optical nonlinearity

“…4(b), the nonlinear refractive index decreased with the increase of the pump power and gradually got stabilized at a smaller value. It is because the optical nonlinearity from the SPR was dominated by collective electron-plasma oscillations induced on Au MNPs by external pumping at optical absorption wavelength of the optical glass fibers [23,31].…”

Optical reflectivity of a disordered monolayer of highly scattering particles: coherent scattering model versus experiment

“…Using the amplitudes of the effective plane waves exciting the particles in Eqs. (9) and (10) and dot multiplying both sides of the first equation withê i and the second one withê r yield,…”

“…The optical reflectivity of disordered monolayers of particles has been of interest for many years now [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Particular attention was paid in the past to the case of monolayers of small metallic particles whose size is much smaller than the incident wavelength adsorbed on a flat surface (see, for instance, [2][3][4][5][6][7][8][9][10][11]).…”

“…Particular attention was paid in the past to the case of monolayers of small metallic particles whose size is much smaller than the incident wavelength adsorbed on a flat surface (see, for instance, [2][3][4][5][6][7][8][9][10][11]). The problem of light reflection from monolayers of particles with size comparable to the wavelength has been addressed in more recent studies (see, for instance, [12][13][14][15][16][17]).…”

Modeling the optical properties of nanocomposite media using effective transfer matrices

“…Similar configurations have been modeled previously [78,13]. We investigated three different geometries.…”