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Active control of propagating surface plasmons.

机译:主动控制传播的表面等离子体激元。

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摘要

Periodic arrays of subwavelength holes in metal films have been shown to exhibit enhanced transmission at wavelengths determined by the periodicity of the hole arrays and the dielectric permittivity of the metal and the surrounding materials. The phenomenon, referred to as Extraordinary Optical Transmission (EOT), is argued to be caused by the generation of Surface Plasmon Polaritons (SPP's), on the metal dielectric interface. In this work, the EOT properties of a grating designed for the mid-Infrared (mid-IR) spectral range, where much less experimental and theoretical work has been conducted than has been for the visible and near-IR, is investigated with a broadband optical source, as well as a dual wavelength Quantum Cascade Laser (QCL). A method for actively controlling the coupling of incident electro-magnetic radiation to propagating surface plasmon polaritons is developed which makes use of propagation on the surface and transmission through the grating as an imaging technique. The demonstration of active control of plasmonic propagation with an EOT grating holds promise as a step towards active plasmonic devices.
机译:已经显示出金属膜中的亚波长空穴的周期性阵列在由空穴阵列的周期性以及金属和周围材料的介电常数确定的波长下显示出增强的透射率。据称这种现象称为非凡的光学传输(EOT),是由于在金属介电界面上产生了表面等离激元极化子(SPP)。在这项工作中,使用宽带研究了针对中红外(mid-IR)光谱范围设计的光栅的EOT特性,在该范围内,进行的实验和理论工作比可见光和近红外少得多。光源,以及双波长量子级联激光器(QCL)。开发了一种主动控制入射电磁辐射与传播的表面等离激元极化子的耦合的方法,该方法利用了表面上的传播和通过光栅的透射作为成像技术。用EOT光栅对等离子传播进行主动控制的演示有望成为朝着有源等离子设备迈出的一步。

著录项

  • 作者

    Ribaudo, Troy.;

  • 作者单位

    University of Massachusetts Lowell.;

  • 授予单位 University of Massachusetts Lowell.;
  • 学科 Physics Optics.
  • 学位 M.S.
  • 年度 2009
  • 页码 34 p.
  • 总页数 34
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 光学;
  • 关键词

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