Known for their ability to seamlessly integrate into semiconductor chips, VCSELs (vertical cavity surface-emitting lasers) are used in everything from computer mice to face-scanning hardware in smartphones. However, these devices are still very much an active field of research, and many researchers believe there are still important applications waiting to be discovered.
The laboratory of Kent Choquette, a professor of electrical and computer engineering in The Grainger College of Engineering at the University of Illinois Urbana-Champaign, has developed a new design in which light from multiple VCSELs combines to form a single coherent pattern called a “supermode.”
As the researchers report in the IEEE Photonics Journal, the result is a controllable pattern brighter than what is possible with an array of independent devices, adding to the capabilities of these already-versatile devices.
