Flexible, all-inorganic spintronic terahertz emitter works from 80 K to 500 K
Researchers at the Institute of Physics of the Chinese Academy of Sciences, the Ningbo Institute of Materials Technology and Engineering, Beihang University and other institutions have demonstrated a flexible spintronic terahertz emitter that works from 80 K to 500 K. The team says it is the first all-inorganic flexible spintronic emitter, and that its working temperature range is wider than any reported for a spintronic terahertz emitter.
The emitter’s layer structure and operation: laser pulse in, terahertz pulse out, with bending and temperature effects on the intensity. Image from: The Innovation
Spintronic terahertz emitters work by firing a femtosecond laser at a bilayer of a ferromagnet and a second layer with strong spin-orbit coupling. The laser launches a spin current, which is converted into a transient charge current that radiates a broadband terahertz pulse. The few flexible versions reported so far were built on polymer substrates, which, the researchers note, cannot sustain high or low temperatures.
Source: https://www.spintronics-info.com/flexible-all-inorganic-spintronic-terahertz-emitter-works-80-k-500-k
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