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 ...

Microscope image of a cross-section of waveguide array in a topological crystalline insulator lattice geometry. New research shows that this configuration allows light to be confined in a way that is ...

Researchers have eliminated the need for multiple layers by developing an achromatic metagrating that handles all colors in a single glass layer. One of the main hurdles to the commercialization of AR ...