标题： 超表面增强的透明度 显示英文标题

标题： Metasurface-Enhanced Transparency

摘要： 我们考虑从高折射率介质向低折射率环境的光传输问题。 虽然在具有平滑界面的系统中，全内反射会严重限制这种传输，但衍射超表面可能有助于将进入界面的倾斜角度的光耦合出来。 我们证明，结构化界面的轮廓可以通过数值优化来针对特定的发射模式。 我们的研究表明，尽管超表面可以帮助从多个入射方向耦合出光，但总传输效率存在一个与两种材料的介电特性有关的普遍极限，该极限与超表面耦合器的轮廓和组成无关。 显示英文摘要

摘要： We consider the problem of light transmission from a high refractive index medium into a low index environment. While total internal reflection severely limits such transmission in systems with smooth interfaces, diffractive metasurfaces may help out-couple light that enters an interface at blazing angles. We demonstrate that the profile of the structured interface can be numerically optimized to target a particular emission pattern. Our study suggests that while metasurfaces can help to out-couple light from a range of incident directions, there exists a universal limit for total transmission efficiency that depends only on the dielectric properties of the two materials and is independent of the profile and the composition of the metasurface coupler.