Todorov Y, Tosetto L, Teissier J, Andrews A M, Klang P, Colombelli R, Sagnes I, Strasser G, Sirtori C
Laboratoire de Matériaux et Phénomènes Quantiques, Université Paris Diderot & CNRS - UMR 7162, Paris Cedex 13, France.
Opt Express. 2010 Jun 21;18(13):13886-907. doi: 10.1364/OE.18.013886.
We present an experimental and theoretical study of the optical properties of metal-dielectric-metal structures with patterned top metallic surfaces, in the THz frequency range. When the thickness of the dielectric slab is very small with respect to the wavelength, these structures are able to support strongly localized electromagnetic modes, concentrated in the subwavelength metal-metal regions. We provide a detailed analysis of the physical mechanisms which give rise to these photonic modes. Furthermore, our model quantitatively predicts the resonance positions and their coupling to free space photons. We demonstrate that these structures provide an efficient and controllable way to convert the energy of far field propagating waves into near field energy.
我们展示了对太赫兹频率范围内具有图案化顶部金属表面的金属-电介质-金属结构光学特性的实验和理论研究。当电介质平板的厚度相对于波长非常小时，这些结构能够支持强烈局域化的电磁模式，集中在亚波长金属-金属区域。我们对产生这些光子模式的物理机制进行了详细分析。此外，我们的模型定量预测了共振位置及其与自由空间光子的耦合。我们证明，这些结构提供了一种有效且可控的方式，将远场传播波的能量转换为近场能量。
