Core Viewpoint - Researchers at Caltech have developed a technology that allows light to transmit on silicon wafers with extremely low signal loss, approaching fiber optics performance even in the visible light spectrum, marking a significant breakthrough in photonic integrated circuits (PIC) [2][5] Group 1: Technological Advancements - The new technology combines the low-loss characteristics of fiber optics with large-scale integrated circuits, enabling the creation of ultra-low-loss photonic integrated circuits [5] - The research team utilized germanium-silicate glass, identical to fiber optic materials, to construct optical circuits directly on 8-inch and 12-inch wafers, achieving near-zero energy loss in circuits [6] - The new platform's performance in the visible light spectrum is reported to be 20 times better than that of silicon nitride, which is widely used for its low-loss data transmission properties [7] Group 2: Applications and Implications - The advancements are expected to significantly expand the application capabilities of on-chip technology, supporting high-precision devices such as optical clocks and gyroscopes, while optimizing communication in AI data centers and advancing quantum computing systems [2][5] - The technology's ability to achieve atomic-level surface smoothness greatly reduces scattering loss, which has been a bottleneck for traditional visible light photonic integrated circuits [7] - The new spiral waveguide chip design allows for extended light transmission distances on chips, similar to light transmission in coiled fiber optics, but compressed to a much smaller area [6][10] Group 3: Future Prospects - The research indicates that the new technology could enable a wide range of applications, akin to a "Swiss Army knife" for various scenarios, including chip-level atomic sensors and optical clocks [11][12] - The team has demonstrated multiple optical devices made from the new materials, including ring resonators and various types of lasers, highlighting the potential for further advancements in the field [12]