Leonhardt Ulf
School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, Scotland.
Science. 2006 Jun 23;312(5781):1777-80. doi: 10.1126/science.1126493. Epub 2006 May 25.
An invisibility device should guide light around an object as if nothing were there, regardless of where the light comes from. Ideal invisibility devices are impossible, owing to the wave nature of light. This study develops a general recipe for the design of media that create perfect invisibility within the accuracy of geometrical optics. The imperfections of invisibility can be made arbitrarily small to hide objects that are much larger than the wavelength. With the use of modern metamaterials, practical demonstrations of such devices may be possible. The method developed here can also be applied to escape detection by other electromagnetic waves or sound.
一个隐形装置应该能引导光线绕过物体，就好像那里什么都没有一样，而不管光线来自何处。由于光的波动性质，理想的隐形装置是不可能实现的。本研究为在几何光学精度范围内实现完美隐形的介质设计开发了一种通用方法。隐形的不完美之处可以被任意缩小，以隐藏比波长大多的物体。利用现代超材料，此类装置的实际演示或许是可行的。这里开发的方法也可应用于躲避其他电磁波或声音的探测。
