Wu Kedi, Wang Guo Ping
Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan, China.
Opt Express. 2010 Sep 13;18(19):19894-901. doi: 10.1364/OE.18.019894.
Invisibility carpet cloaks are usually used to hide an object beneath carpet. In this paper we propose and demonstrate a carpet filter to hide objects and create illusions above the filter by using a Fourier optics method. Instead of using transformation optics, we get electromagnetic parameters of the filter by optical transfer functions, which play the role of modulating the propagation of the scattering angular spectrum directly from an object above the filter. By further adding a functional layer onto the filter, we can even camouflage the object so that it appears to be a different object. The analytical results are confirmed by numerical simulations. Our method is completely different from the current coordinate transfer method and may provide another point of view to more clearly understand the mechanism of invisibility cloaks.
隐形地毯斗篷通常用于将物体隐藏在地毯下方。在本文中，我们提出并展示了一种地毯滤波器，通过傅里叶光学方法在滤波器上方隐藏物体并制造幻象。我们不是使用变换光学，而是通过光学传递函数来获取滤波器的电磁参数，这些函数直接从滤波器上方的物体调制散射角谱的传播。通过在滤波器上进一步添加功能层，我们甚至可以伪装物体，使其看起来像另一个物体。分析结果通过数值模拟得到证实。我们的方法与当前的坐标变换方法完全不同，可能为更清晰地理解隐形斗篷的机制提供另一种视角。
