Pang Y, Hone A N, So P P M, Gordon R
Department of Electrical and Computer Engineering, University of Victoria, Victoria, BC V8P 5C2 Canada.
Opt Express. 2009 Mar 16;17(6):4433-41. doi: 10.1364/oe.17.004433.
We present the theory of total optical transmission through a small hole in metal waveguide screen. Unlike past works on extraordinary optical transmission using arrays, there is only a single hole; yet, the theory predicts total transmission for a perfect electric conductor (not normalized to the hole size) 100% transmission, regardless of how small the hole. This is very surprising considering the usual application of Bethe's theory to waveguide apertures. Comprehensive numerical simulations agree well with the theory and their modal-analysis supports the proposed evanescent-mode mechanism for total transmission. These simulations are extended to show the influence of realistic material response (including loss) at microwave and visible-infrared frequencies. Due to the strong resonant field localization and transmission from only a thin metal screen with a single hole, many promising applications arise for this phenomenon including filtering, sensing, plasma generation, nonlinear optics, spectroscopy, heating, optical trapping, near-field microscopy and cavity quantum electrodynamics.
我们提出了通过金属波导屏上的小孔实现全光传输的理论。与过去关于使用阵列实现超常光传输的研究不同，这里只有一个小孔；然而，该理论预测对于理想电导体（未按孔尺寸归一化）能实现100%的全传输，无论孔有多小。考虑到贝塞尔理论在波导孔径方面的通常应用，这非常令人惊讶。全面的数值模拟与该理论吻合良好，其模态分析支持了所提出的用于全传输的倏逝模机制。这些模拟还被扩展以展示在微波和可见 - 红外频率下实际材料响应（包括损耗）的影响。由于仅通过带有单个小孔的薄金属屏就能实现强共振场局域化和传输，这一现象产生了许多有前景的应用，包括滤波、传感、等离子体产生、非线性光学、光谱学、加热、光镊、近场显微镜以及腔量子电动力学。
