A sandwich of ultra-thin magnetic layers can turn messy noise into a perfectly structured laser-like tool for ultra-fast computing.
Spintronic emitters usually blast out a chaotic, broadband signal that is difficult to use for precise measurements. These researchers used femtosecond light pulses to force these layers into generating coherent terahertz frequency combs. These combs act like a high-speed ruler for light, capable of timing events that happen in trillionths of a second. This technology fits on a chip and works at room temperature, making it practical for the next generation of wireless data. It bridges the gap between traditional electronics and high-frequency light-based tech.
THz frequency combs from interfacial spatiotemporal overlap in spintronic multilayers
research_square · rs-9613109
Abstract The terahertz (THz) spectral region bridges electronic and photonic domains, yet the development of compact, coherent, and tunable THz sources remains a central challenge. Spintronic emitters based on ultrafast spin dynamics have emerged as promising broadband THz sources. However, they have been studied primarily within linear spin–charge conversion frameworks, with nonlinear coupling phenomena, such as frequency comb generation, largely unexplored. Accessing this nonlinear regime woul