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首页> 外文期刊>Physica status solidi, B. Basic research >Light scattering of interacting gold nanorods
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Light scattering of interacting gold nanorods

机译：相互作用的金纳米棒的光散射

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The optical field intensity of light scattering from nanorods of gold has been imaged at distances that are intermediate between the near-field and far-field regimes using a near-field scanning optical microscope (NSOM). For scattering from isolated nanorods the Fraunhofer diffractive behaviour is modified slightly by the dipolar nature of metal nanoantannae as would be expected at these imaging distances. However, when the nanorods are brought into close proximity, interactions between the nanorods alter the scattering behaviour substantially creating large field intensities between the structures. By sampling the field with the near-field microscope tip scanned at different heights, detailed maps of the scattering profile can be generated. The NSOM image of far-field scattered light from an isolated gold nanorod. The nanorod was imaged at a distance of roughly 8mm above the support substrate using a scanning near-field microscope operated at constant height mode.
机译：从金的纳米棒散射的光的光场强度已经使用近场扫描光学显微镜（NSOM）在近场和远场范围之间的中间距离成像。对于从孤立的纳米棒的散射，Fraunhofer的衍射行为被金属纳米蒽的偶极性质稍微改变，如在这些成像距离处所预期的。然而，当纳米棒紧密靠近时，纳米棒之间的相互作用改变了散射行为，从而在结构之间产生了较大的场强。通过用在不同高度扫描的近场显微镜尖端对视场进行采样，可以生成散射轮廓的详细图。来自孤立金纳米棒的远场散射光的NSOM图像。使用以恒定高度模式操作的扫描近场显微镜在支撑衬底上方约8mm的距离处对纳米棒成像。

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