论文标题
从子波介电板支撑
Departure from Babinet principle in metasurfaces supported by subwavelength dielectric slabs
论文作者
论文摘要
对称原理和定理在光学中至关重要。确实，从一方面，他们可以通过消除非物理解释来直接了解现象。从另一侧，他们通过缩小设计变量的参数空间来指导光子组件的设计师。在这封信中，我们说明了与Babinet光谱互补性的显着背道而驰，这是一个非常常见和技术相关的情况：放置在亚波长介电板上的图案传导屏幕的情况。 Babinet定理预测的对称属性是正确恢复的几何互补互补的 - 但在应用方面不太现实 - 独立的图案屏幕。我们的分析将实验数据与完全矢量电磁建模合并，并提供了Babinet定理的另一种形式，该形式突出了与电磁二元性概念的联系。
Symmetry principles and theorems are of crucial importance in optics. Indeed, from one side they allow to get direct insights into phenomena by eliminating unphysical interpretations; from the other side, they guide the designer of photonic components by narrowing down the parameter space of design variables. In this Letter we illustrate a significant departure from the Babinet spectral complementarity in a very common and technologically relevant situation: that of a patterned conducting screen placed on a subwavelength dielectric slab. The symmetry property predicted by Babinet theorem is correctly recovered for pairs of geometrically complementary - but less realistic in terms of applications - free-standing patterned screens. Our analysis merges experimental data with fully vectorial electromagnetic modeling, and provides also an alternative form of Babinet theorem that highlights a connection with the concept of electromagnetic duality.
