OPN Video

Selection by Direction

POSTED: 28 March 2014

Yichen Shen and colleagues at MIT have, for the first time, demonstrated a system that can filter light of any wavelength based on its propagation direction. This video shows the system in action -- as the sample is rotated, it behaves like a mirror in all orientations save one, in which it suddenly acts like transparent glass. Read more about the work in our Newsroom post.