With the advent and rapid development of the transformation optics and metamaterials, invisibility cloaks have captivated much attention in recent years. While most cloaking schemes suffer from limited bandwidth, the carpet cloak, which can hide an object on a reflecting plane, can operate over a broadband frequency range. However, the carpet cloaks experimentally realized thus far still have several limitations. For example, the quasi-conformal mapping carpet cloak leads to a lateral shift of the reflected light ray, while the birefringent carpet cloak only works for a specific polarization. In this work, we propose a conformal transformation scheme to tackle these two problems simultaneously. As an example, we design a mid-infrared carpet cloak in a silicon platform and demonstrate its polarization-insensitive property as well as the minimized lateral shift over a broad frequency band from 24 to 28.3 THz.

中文翻译：

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偏振稳定的中红外地毯斗篷，横向位移最小

随着变换光学和超材料的出现和快速发展，隐形斗篷近年来备受关注。虽然大多数隐形方案都受带宽限制的影响，但地毯式隐形可以在反射平面上隐藏物体，可以在宽带频率范围内工作。然而，迄今为止通过实验实现的地毯斗篷仍有一些局限性。例如，准共形映射地毯斗篷会导致反射光线的横向偏移，而双折射地毯斗篷仅适用于特定的偏振。在这项工作中，我们提出了一种共形转换方案来同时解决这两个问题。举个例子，