Over the holiday period, the arXivblog is running a selection of the most popular posts from 2008
5 November 2008: Cloaking objects at a distance
One of the disadvantages of invisibility cloaks is that anything placed inside one is automatically blinded, since no light can get in.
Now Yun Lai and colleagues from The Hong Kong University of Science and Technology have come up with a way round this using the remarkable idea of cloaking at a distance. This involves using a “complementary material” to hide an object outside it.