Article

Caltech researchers have created a method for achieving low signal loss in silicon wafers, with performance comparable to optical fiber at visible wavelengths. This advancement in photonic integrated circuits allows for devices with high coherence and reduced energy loss, impacting technologies such as optical clocks and quantum sensors.

The team used germano-silicate to create waveguides via lithography, enhancing performance over silicon nitride. The ability to achieve atomic-level smoothness in the waveguides further reduces scattering loss. The research, funded by various defense and research grants, indicates potential for significant advancements in chip-scale technology.