首页> 外文会议>Conference on Ultrafast Phenomena in Semiconductors and Nanostructure Materials >Extraordinary single cycle terahertz transmission through ensembles of sub-wavelength size metal particles
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Extraordinary single cycle terahertz transmission through ensembles of sub-wavelength size metal particles

机译:通过亚波长尺寸金属粒子的集合来传输非凡的单周期太赫兹传输

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We investigate on-axis terahertz transmission through random collections of sub-wavelength sized metallic particles. Despite both the inherent opacity of the metallic particles at terahertz frequencies and the absence of straight-line photon trajectories through the samples, we observe significant, polarized terahertz transmission through dense metallic particle collections, which are five orders of magnitude thicker than the radiation skin depth. The effects of sample length, particle size, particle shape, and conductivity on the enhanced transmission are explored experimentally and numerically. Our findings show that the polarized terahertz transmission is mediated by coherent near-field coupling of surface electromagnetic waves across the ensemble.
机译:我们通过亚波长尺寸的金属颗粒随机集合来研究轴轴太赫兹传输。尽管在太赫兹频率下的金属颗粒具有固有的不透明度以及通过样品的直线光子轨迹,但我们观察到通过致密金属颗粒收集的重要,极化的太赫兹传播,这是比辐射肌肤深度厚的五个数量级。实验和数值探索样品长度,粒度,颗粒形状和电导率对增强速度的影响。我们的研究结果表明,偏振太赫兹透射率是通过整体表面电磁波的相干近场耦合介导的。

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