VCSELs are tiny semiconductor lasers that emit light vertically from their surfaces. They are used in a variety of applications, including optical communication, laser printing, and medical imaging. However, VCSELs are typically made of compound semiconductors, which are more expensive and difficult to process than silicon.
The researcher, Shanhui Fan, developed a technique to grow VCSELs directly on silicon wafers. This eliminates the need for a compound semiconductor substrate, which can reduce the cost of VCSEL production. Fan's technique also allows for the precise control of the VCSELs' optical properties, which could improve their efficiency and performance.
The researcher's findings are published in the journal Nature Photonics.
"This work represents a significant breakthrough in the field of optoelectronics," said Fan. "By demonstrating how to fully integrate VCSELs on silicon, we have opened up new possibilities for the development of smaller, cheaper, and more efficient optical communications devices."
Fan's research team is currently working on developing new VCSEL-based devices for a variety of applications. These devices could include high-speed optical transceivers, optical sensors, and laser-based displays.
The researcher's work is supported by the National Science Foundation and the Department of Energy.
