首页> 外文会议>European Optical Society annual meeting;EOSAM 2010 >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激元:随着纳米结构尺寸的散射演化

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摘要

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:通过消光光谱表征被介电介质包围的金属纳米颗粒(NP)的光学性质。通过这种表征方式给出的光谱表示入射光中与NP相互作用的部分。吸收和散射是描述这种相互作用的两种现象,它们的总和称为消光。我们在这里研究通过电子束光刻和剥离技术设计的沉积在玻璃基板上的金纳米金的阵列。结果是一些具有可变直径(从50 nm到200 nm)的圆柱形状的样品。 Mie理论[1]表明,上述每个现象的贡献随着NP维数的变化而变化。更精确地,可以预见,对于金通常大于120 nm的直径,散射现象比吸收具有更大的贡献。因此,测量了具有可变直径的金纳米圆柱的消光光谱,并通过使用用于收集与NP相互作用的光的不同物镜提取了散射贡献。这些实验结果通过Mie理论计算直接在理论上进行比较。由于这些纳米结构基板的消光光谱法,应检测到这种行为。

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  • 来源
  • 会议地点 Paris(FR);Paris(FR)
  • 作者单位

    Universite Paris XIII, Laboratoire CSPBAT (FRE 3043), UFR SMBH, equipe LBPS, 93017 Bobigny, France;

    Universite Paris XIII, Laboratoire CSPBAT (FRE 3043), UFR SMBH, equipe LBPS, 93017 Bobigny, France;

    Universite de technologie de Troyes, Laboratoire de Nanotechnologie et d'instrumentation Optique, Institut Charles Delaunay, FRE 2848, 12 rue Marie Curie,10010 Troyes, France;

    Universite de technologie de Troyes, Laboratoire de Nanotechnologie et d'instrumentation Optique, Institut Charles Delaunay, FRE 2848, 12 rue Marie Curie,10010 Troyes, France;

    Universite Paris XIII, Laboratoire CSPBAT (FRE 3043), UFR SMBH, equipe LBPS, 93017 Bobigny, France;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程光学;
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