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Optical characteristics of gold nanoparticle-doped multilayer thin film

机译:纳米金掺杂多层薄膜的光学特性

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A variety of surface plasmon resonance (SPR) peaks of gold nanoparticles was detected in the wavelength range between the SPR peak of Au/SiO2 (similar to 535 nm) and Au/TiO2 (similar to 655 nm) with the parameter x in the triple-component composite films, (SiO2)(1-x)/Au/(TiO2)(x). Based on the spectrum of the dielectric constant of An and the location of the SPR peaks, the effective refractive index n(eff) of these composite films was found to be almost equal to n(SiO2) center dot(1-x)+n(TiO2) center dot x. These composite films can be used as optical filters owing to their high damage threshold value (>6.5 MW/cm(2)). Their potential applications in nonlinear optical devices are due to their larger third-order nonlinear susceptibilities, chi((3)), which were measured by the degenerate four-wave-mixing method at a laser wavelength of 532 nm. The chi((3)) value reached 2.6 X 10(-6) esu. (C) 2005 Optical Society of America.
机译:在三元组参数x中,在Au / SiO2(约535 nm)和Au / TiO2(约655 nm)的SPR峰之间的波长范围内检测到了金纳米颗粒的各种表面等离子体共振(SPR)峰。组分复合膜(SiO2)(1-x)/ Au /(TiO2)(x)。根据An的介电常数谱和SPR峰的位置,发现这些复合膜的有效折射率n(eff)几乎等于n(SiO2)中心点(1-x)+ n (TiO2)中心点x。这些复合膜由于其较高的损伤阈值(> 6.5 MW / cm(2))而可用作滤光片。它们在非线性光学器件中的潜在应用是由于其较大的三阶非线性磁化率chi((3)),其通过简并四波混频方法在532 nm的激光波长下测量。 chi((3))值达到2.6 X 10(-6)esu。 (C)2005年美国眼镜学会。

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