Rechtsman1-2018 Waveguide array

Rechtsman1-2018 Waveguide array

Illustration of two-dimensional waveguide array

Illustration of light passing through a two-dimensional waveguide array. Each waveguide is essentially a tube, which behaves like a wire for light, inscribed through high-quality glass using a powerful laser. Many of these waveguides are inscribed closely spaced through a single piece of glass to form the array. Light that flows through the device behaves precisely according to the predictions of the four-dimensional quantum Hall effect.

IMAGE: Rechtsman Laboratory, Penn State