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Environment effects on surface-plasmon spectra in gold-island films potential for sensing applications

机译:环境对金岛膜表面等离激元光谱的影响,可用于传感应用

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摘要

The effects of the local dielectric environment on the surface-plasmon resonances of annealed gold-island films as a potential for sensing applications are studied experimentally and modeled theoretically. Gold-island films were annealed at 600℃ to produce spheroidal shape particles that exhibit well-resolved resonances in polarized, angle-resolved, absorption spectra. These resonances are shifted in different amounts by the depolarization effect of the surrounding medium (liquids with various refraction indices). Cross-section calculations based on nonretarded, single-particle, dielectric interaction for these various configurations are presented and are found to be in good agreement with the experimental observations. The results show an interesting potential for biosensing or environmental monitoring applications. # 1998 Optical Society of America OCIS codes: 240.6680, 260.3910, 290.5850.
机译:实验研究了局部电介质环境对退火的金岛薄膜表面等离子体共振的影响,并将其作为传感应用的潜力,并进行了理论建模。将金岛薄膜在600℃退火,以产生球形形状的颗粒,该颗粒在偏振,角度分辨的吸收光谱中具有良好分辨的共振。这些共振通过周围介质(具有各种折射率的液体)的去极化作用而以不同的量移动。提出了基于非缓释,单粒子介电相互作用的横截面计算,用于这些各种配置,并且发现与实验观察结果非常吻合。结果显示了在生物传感或环境监测应用中的有趣潜力。 #1998美国光学学会OCIS编码:240.6680、260.3910、290.5850。

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