Caltech Develops Chip That Redirects Light in Just 74 Femtoseconds

A new device developed at Caltech can redirect a light beam in an extraordinarily short time: just 74 femtoseconds. This technological breakthrough, centered on a tiny chip, represents a significant step toward the future of many fields.

Unprecedented Speed in Light Manipulation

To put the speed in perspective, 74 femtoseconds equals 74 quadrillionths of a second. This ability to manipulate light on such a minuscule timescale is the core of Caltech’s innovation, enabling unprecedented control over light behavior.

The device, a miniature chip, works by using a second light beam and a nanoscale silicon metasurface. This combination allows precise redirection of the primary light beam with the mentioned agility.

Potential to Transform Photonic Technologies

Redirecting light this quickly could pave the way for dramatic advances in photonic communication technologies. In this field, information is transmitted via light pulses, offering the potential for data‑transfer speeds far beyond traditional electronic methods. With this new chip, the rapid manipulation of light could lead to significantly faster and more efficient communication systems.

Similarly, the development may impact computing. Photonic computing, which uses light instead of electrons to process information, aims to surpass the speed and energy‑consumption limits of current processors. A device that can “guide” light this fast provides a promising tool for building computational components that operate at frequencies previously considered challenging, boosting processing speed.

Finally, sensing technologies could also benefit. Light‑based sensors are employed across a wide range of applications—from medicine to industry and scientific research—to detect and measure various properties. With femtosecond‑scale light control, new possibilities emerge for developing sensors that are more precise, faster, and more sensitive, capable of capturing real‑time information with significantly enhanced resolution.

This Caltech breakthrough underscores the potential of light manipulation to shape the technological future. The precision and speed achieved by this tiny chip signal an era where light could be the key to dramatically faster and more efficient systems across multiple domains.

With information from ScienceDaily.