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Near-field investigations of localized surface plasmon resonances in gold nanospheres and plasmonic nanoantennas.

机译:金纳米球和等离子体纳米天线中局部表面等离子体共振的近场研究。

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摘要

The near-field contrast formation in spherical nanoparticles and bowtie shaped metallic nanostructures is investigated using apertureless near-field scanning optical microscopy (ANSOM). Field enhancement due to plasmon resonance is explored of gold nanospheres prepared via drop-casting and plasmonic nanoantennas prepared via high resolution electron beam lithography. Specifically, the fundamental properties of localized surface plasmon resonance (LSPR) due to variably-sized gold nanospheres and gold bowtie nanoantennas under varied polarization angles are examined. These experimental results are compared to theoretical model calculations based on an extended dipole model and finite-difference time-domain (FDTD) simulations [1] for the absorption and scattering of a nanoparticle and bowtie nanoantenna at or near plasmon resonance. Near-field measurements of signal enhancement due to LSPR were taken and analyzed.
机译:使用无孔近场扫描光学显微镜(ANSOM)研究了球形纳米颗粒和领结形金属纳米结构中的近场对比度形成。研究了通过等离子共振产生的场增强,该技术通过滴铸法制备的金纳米球和通过高分辨率电子束光刻法制备的等离子纳米天线。具体来说,研究了在变化的极化角下由于尺寸可变的金纳米球和金领结纳米天线而引起的局部表面等离子体共振(LSPR)的基本特性。将这些实验结果与基于扩展偶极子模型和有限差分时域(FDTD)模拟[1]的等离子共振或接近等离子共振吸收和散射纳米粒子和领结纳米天线的理论模型计算进行比较。进行并分析了由于LSPR引起的信号增强的近场测量。

著录项

  • 作者

    Heiberg, Bryan Dale.;

  • 作者单位

    California State University, Long Beach.;

  • 授予单位 California State University, Long Beach.;
  • 学科 Nanoscience.;Physics General.
  • 学位 M.S.
  • 年度 2011
  • 页码 65 p.
  • 总页数 65
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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