Waveguide array

Waveguide array

Microscope image of waveguide array and schematic of waveguides

Microscope image of the laser written waveguide array (left) fabricated in glass by researchers at Penn State to have a geometry that leads to the topological protection of light. Laser light traveling through the ornately microfabricated glass—schematic (right) shows the three-dimensional paths of four waveguides in the device—has been shown to interact with itself to form self-sustaining wave patterns called solitons.

IMAGE: Rechtsman Laboratory, Penn State