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首页> 外文会议>European Optical Society annual meeting >Localized Surface Plasmons on gold nanostructures: Scattering evolution with the nanostructures size
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Localized Surface Plasmons on gold nanostructures: Scattering evolution with the nanostructures size

机译：金纳米结构上的局部表面等离子体：纳米结构尺寸的散射进化

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The optical properties of metal nanoparticles (NP) surrounded by a dielectric medium are characterized by extinction spectroscopy. The spectra given by this way of characterization represent the part of the incident light that has interacted with the NP. Absorption and scattering are two phenomena that describe this interaction and their sum is called extinction. We here investigate arrays of gold NP deposited on a glass substrate designed through electron beam lithography and lift off techniques. It results some samples with cylindrical shape of variable diameters (from 50 nm to 200 nm). Mie theory [1] shows that the contribution of each phenomena described above evolutes with the NP dimensions. More precisely, it is predicted that the scattering phenomenon has a bigger contribution than absorption for diameter typically above 120 nm for gold. Thus, extinction spectra of gold nanocylinders with variable diameters are measured and the scattering contribution is extracted by using different objective lens used to collect the light that interacted with the NP. These experimental results are directly compared theoretically by Mie theory calculation. This behaviour should be detected thanks to extinction spectroscopy of these nanostructured substrates.
机译：由介电介质围绕的金属纳米颗粒（NP）的光学性质的特征在于消光光谱。通过这种特征方式给出的光谱代表了与NP相互作用的入射光的一部分。吸收和散射是两个描述这种互动的现象，并且它们的总和被称为灭绝。我们在此研究沉积在通过电子束光刻设计的玻璃基板上的金NP阵列，并抬起技术。它会产生一些具有可变直径（50nm至200nm）的圆柱形形状的样品。 MIE理论[1]表明，上述每种现象的贡献与NP尺寸逐渐变成。更确切地说，预测散射现象的贡献比直径的吸收更大，通常在120nm上高于120nm。因此，测量具有可变直径的金纳米纳米粘土机的消光光谱，并通过使用用于收集与NP相互作用的光的不同物镜来提取散射贡献。这些实验结果在理论上直接与MIE理论计算进行比较。由于这些纳米结构基材的消光光谱，应检测该行为。

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