New mirror reflects light differently than conventional ones
US-based researchers have designed a chiral meta-mirror which reflects the same spin state of circularly polarised light, which travels in either a clockwise (right) or counterclockwise (left) fashion. Conventional mirrors reverses the spin state, flipping left to right, and vice versa. The meta-mirror can, however, preserve only one of the spin states of incident wave, while absorbing the other.