论文标题
使用Metafilm中的Brewster效应对组延迟的宽带控制
Broadband control of group delay using the Brewster effect in metafilms
论文作者
论文摘要
我们提出并验证一种方法，用于控制电磁波在较大频率范围内的频率依赖性，使用BREWSTER效应在具有有限厚度的单层超材料中，此处称为Metafilms。当元素的反射率消失，无论其入射频率如何，小组延迟都可以在其谐振频率附近较大，同时保持接近统一的透射率，无论其入射频率如何。此外，当将几个无反射的元素堆叠在一起时，总组延迟应作为单个组延迟的总和。在这项研究中，我们通过排列元原子来意识到无反射元素，以便无论入射频率如何，都会发生Brewster效应。我们在数值模拟和实验中评估透射率和三层超材料的群体延迟的频率依赖性，由无反射的无反射元素组成，具有不同的共振频率，并发现该元手材的总透射率和组延迟与该组的传输和组成共同的成果同意。
We propose and verify a method for controlling the frequency dependence of the group delay of electromagnetic waves over a broad frequency range using the Brewster effect in single-layer metamaterials with finite thickness, here referred to as metafilms. When the metafilm's reflectance vanishes regardless of the incident frequency, the group delay can be large near its resonance frequency while maintaining the transmittance close to unity regardless of the incident frequency. Furthermore, when several reflectionless metafilms are stacked together, the total group delay should be given as the sum of the individual group delays. In this study, we realize reflectionless metafilms by arranging the meta-atoms so that the Brewster effect occurs regardless of the incident frequency. We evaluate in numerical simulations and experiments the frequency dependence of the transmittance and of the group delay of a three-layer metamaterial composed of reflectionless metafilms with different resonance frequencies, and find that the total transmittance and group delay of this metamaterial agree respectively with the product of the transmittances and the sum of the group delays of the constituent metafilms.
