Barnes W L, Murray W A, Dintinger J, Devaux E, Ebbesen T W
School of Physics, University of Exeter, Stocker Road, Exeter, United Kingdom.
Phys Rev Lett. 2004 Mar 12;92(10):107401. doi: 10.1103/PhysRevLett.92.107401. Epub 2004 Mar 9.
We present results of the transmitted, reflected, and absorbed power associated with the enhanced transmittance of light through a silver film pierced by a periodic array of subwavelength holes. Comparing experimentally acquired dispersion curves under different polarization conditions shows that the transmission features of the array are consistent with p-polarized resonant modes of the structure. By exploring the regime in which no propagating diffracted orders are allowed, we further show that the transmittance maxima are associated with both reflectance minima and absorption maxima. These new results provide strong experimental evidence for transmission based on diffraction, assisted by the enhanced fields associated with surface plasmon polaritons.
我们展示了与光通过由周期性亚波长孔阵列穿透的银膜时增强的透射率相关的透射、反射和吸收功率的结果。比较不同偏振条件下实验获得的色散曲线表明，该阵列的透射特性与结构的p偏振共振模式一致。通过探索不允许传播衍射级的区域，我们进一步表明，透射率最大值与反射率最小值和吸收率最大值都相关。这些新结果为基于衍射的透射提供了有力的实验证据，表面等离激元极化激元相关的增强场对其起到了辅助作用。
