Harry Potter Invisibility Cloak made of gold
Posted: Fri Sep 18, 2015 11:27 pm
http://www.latimes.com/science/sciencen ... story.html
"Usually, when light bounces off a three-dimensional object, the light is scattered and the wavefront gets distorted, which is what allows us to see the object’s angles and curves. The new and improved cloak is covered with nanoantennas made of tiny gold blocks of different sizes that can counteract that distortion, making it seem to an observer like the light is coming from a flat surface."
"Usually, when light bounces off a three-dimensional object, the light is scattered and the wavefront gets distorted, which is what allows us to see the object’s angles and curves. The new and improved cloak is covered with nanoantennas made of tiny gold blocks of different sizes that can counteract that distortion, making it seem to an observer like the light is coming from a flat surface."