Non-linear optical properties of titanium dioxide films containing dispersed gold particles

Evolution of Surface Plasmon Resonance for Silver Particle Film on Mesoporous SiO<SUB>2</SUB> and Soda-Lime Glass During Heating in Air and H<SUB>2</SUB>

“…It is well known that silver ions (in melting AgNO 3 or AgNO 3 solution) can be readily exchanged by alkalis in soda-lime glass. [18][19][20] The Ag + ions resulted from the oxidation of silver during air-heat treatment and could also exchange with Na + in glass, leading to the diffusion of Ag + ions into the sublayer of the substrate. Due to hydrogen permeability in sodalime glass, 21 subsequent H 2 treatment induced the reduction of Ag + ions in the sublayer and the formation of Ag nanoparticles in the sublayer, leading to re-appearance of the SPR at 400 nm (see curve (c) of Fig.…”

Highly dispersed Au nanoparticles incorporated mesoporous TiO2 thin films with ultrahigh Au content

“…1 Au-TiO 2 nanocomposite thin films, owing to the surface plasmon resonance (SPR) enhancement effect of Au NPs and the high refractive index of TiO 2 matrix, present a large third-order nonlinear optical susceptibility around the SPR region. 2 However, most of these materials were synthesized by physical sputtering [2][3][4][5] and sol-gel 6,7 methods, where the Au NPs suffered from comparatively broad size distribution and inhomogeneous spatial dispersion in the synthesized TiO 2 thin films. In addition, most of these researches [2][3][4][5][6][7] focused on the optical nonlinearities of the materials at or near the region of the SPR, where the heat would accumulate in the materials leading to overheating.…”

“…2 However, most of these materials were synthesized by physical sputtering [2][3][4][5] and sol-gel 6,7 methods, where the Au NPs suffered from comparatively broad size distribution and inhomogeneous spatial dispersion in the synthesized TiO 2 thin films. In addition, most of these researches [2][3][4][5][6][7] focused on the optical nonlinearities of the materials at or near the region of the SPR, where the heat would accumulate in the materials leading to overheating.…”

Numerical study of surface plasmon enhanced nonlinear absorption and refraction

“…In order to evaluate the effect of SPinduced field enhancement on the nonlinear absorption of a host material, we investigate the characteristics of a composite consisting of a small volume filling fraction of metal nanoparticles (NPs) in a nonlinear host material. The NLO properties of such dilute metallodielectric composites have been studied extensively both theoretically [9][10][11][12] and experimentally [13][14][15][16][17][18][19][20][21][22][23][24][25]. Many of the experiments reported in literature consider the nonlinear response at a single wavelength or discuss the influence of surface plasmons on the nonlinear response of the composite material while ignoring the effect of the associated changes to the linear response on the figure of merit β c /α c where β c is the effective composite nonlinear absorption coefficient and α c is the composite linear absorption coefficient.…”