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Transmission field enhancement of terahertz pulses in plasmonic, rectangular coaxial geometries

机译:等离子体矩形矩形同轴结构中太赫兹脉冲的传输场增强

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摘要

We report on anomalous field enhancement of terahertz transmission in metallic, rectangular coaxial geometries. The integration of a particle in the hole not only results in a factor of eight increase in normalized transmittance compared to that of the hole-only counterpart, but it also tailors polarization-dependent transmission discrepancy encountered in arrays of rectangular holes. Our experimental and numerical studies on the impact of geometrical dimensions of the integrated particles indicate that dipolar localized surface plasmons of the particles contribute substantially to the terahertz field enhancement through coupling with surface plasmons and localized surface plasmons of the holes.
机译:我们报告了在金属,矩形同轴几何体中太赫兹传输的异常场增强。与仅孔的对应物相比,粒子在孔中的整合不仅导致归一化透射率提高了八倍,而且还调整了矩形孔阵列中遇到的与偏振有关的透射差异。我们对集成粒子的几何尺寸的影响的实验和数值研究表明,粒子的偶极子局部表面等离子体激元通过与表面等离子体激元和孔的局部表面等离子体激元耦合而对太赫兹场的增强有很大贡献。

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  • 来源
    《Optics Letters》 |2010年第7期|p.904-906|共3页
  • 作者单位

    1School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA 2Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542, Singapore;

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