• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >THE INTERACTION BETWEEN ELECTRIC DIPOLES AND WAVEGUIDING SURFACES AT OPTICAL FREQUENCIES (SURFACE PLASMONS, SILVER ISLANDS, WAVEGUIDES, ENHANCEMENT).
【24h】

THE INTERACTION BETWEEN ELECTRIC DIPOLES AND WAVEGUIDING SURFACES AT OPTICAL FREQUENCIES (SURFACE PLASMONS, SILVER ISLANDS, WAVEGUIDES, ENHANCEMENT).

机译：电双极与波导表面在光学频率（表面等离子体，银岛，波导，增强）之间的相互作用。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An electric dipole placed in close proximity to a surface exhibits optical properties that are very different from those of an isolated electric dipole. In the case of a conducting surface, classical theory predicts that the dipole will exhibit a resonance frequency shift, a change in its radiative decay rate, and coupling with a transverse magnetic surface wave at the metal-air interface (i.e. a surface plasmon). These effects have been observed, measured, and analyzed on a dipole/surface system which incorporates a high index dielectric layer between the dipole and the metal, thus forming a metal-clad waveguiding structure.;Fluorescence measurements with dye molecules deposited on the same waveguiding structure show that the radiative intensity can be enhanced by more than two orders of magnitude. This large increase in the radiative yield has been attributed to the occurrence of higher order waveguide modes which interact with the molecules, and the major features of the results agree well with a classical theory.;The results show that sub-wavelength size metal particles with macroscopic dipole moments, when used in this experimental geometry, will exhibit significant resonance frequency shifts. The interaction between these macroscopic dipoles and the propagating surface plasmon resonance also induces a shift in the dispersion relation (omega) (k) which displays the characteristic energy-momentum states of the surface resonance. Measurements of the radiative decay of surface plasmons through a prism show that this interaction leads to a strong coupling which enhances the transfer of energy into the waveguide.
机译：紧邻表面放置的电偶极子的光学特性与隔离的电偶极子的光学特性非常不同。在导电表面的情况下，经典理论预测偶极子将表现出共振频率偏移，其辐射衰减率的变化，并在金属-空气界面（即表面等离子体激元）处与横向磁表面波耦合。已经在偶极子/表面系统上观察，测量和分析了这些效应，该偶极子/表面系统在偶极子和金属之间结合了高折射率介电层，从而形成了金属包覆的波导结构。荧光测量，染料分子沉积在同一波导上结构表明，辐射强度可以提高两个以上的数量级。辐射产率的大幅提高归因于与分子相互作用的高阶波导模的出现，并且其主要特征与经典理论非常吻合。宏观偶极矩在此实验几何中使用时，将表现出明显的共振频率偏移。这些宏观偶极子与传播的表面等离振子共振之间的相互作用也引起了色散关系ω（k）的偏移，从而显示了表面共振的特征能量动量态。通过棱镜对表面等离激元辐射衰减的测量表明，这种相互作用导致牢固的耦合，从而增强了能量向波导的传输。

著录项

  • 作者

    HOLLAND, WILLIAM ROBERT.;

  • 作者单位

    University of Rochester.;

  • 授予单位 University of Rochester.;
  • 学科 Optics.
  • 学位 Ph.D.
  • 年度 1985
  • 页码 178 p.
  • 总页数 178
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号