通过亚波长孔阵列的随机共振实现额外能量耦合
Extra energy coupling through subwavelength hole arrays via stochastic resonance
摘要：
金属表面波与亚波长结构的周期性几何结构之间的相互作用是等离子体激元学最近但至关重要的兴趣更新的核心。最有趣的一点是通过这些周期性结构的异常强传输的观察，它可以超过由板的填充因子给出的经典传输的数量级。实际的范例是，这种异常的传输是由周期性引起的，然后这种高传输应该在随机几何中消失。在这里，我们表明，额外的能量可以耦合通过亚波长结构，通过添加一个受控量的噪声的位置的光圈。这一结果可以在随机共振的统计框架中进行建模。耦合能量相对于噪声的演化使得可以访问在亚波长阵列的表面处耦合的额外能量。
英文摘要：
Interaction between metal surface waves and periodic geometry of subwavelength structures is at the core of the recent but crucial renewal of interest in plasmonics. One of the most intriguing points is the observation of abnormal strong transmission through these periodic structures, which can exceed by orders of magnitude the classical transmission given by the filling factor of the plate. The actual paradigm is that this abnormal transmission arises from the periodicity, and then that such high transmission should disappear in random geometries. Here, we show that extra energy can be coupled through the subwavelength structure by adding a controlled quantity of noise to the position of the apertures. This result can be modelled in the statistical framework of stochastic resonance. The evolution of the coupled energy with respect to noise gives access to the extra energy coupled at the surface of the subwavelength array.
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