Innovation strengthens electron-triggered light emissions for quantum-based computational and communicationssystems hkuniversity nature
Now, researchers at The University of Hong Kong , MIT and other universities say they have come up with an innovative way to make more robust interactions between photons and electrons possible, that produces a hundredfold increase in the emission of light from a phenomenon called Smith-Purcell radiation. The findings have potential ramifications for both
Through a combination of computer simulations and laboratory experiments, the team found that using a beam of electrons with a specially designed photonic crystal—a slab of silicon on an insulator, etched with an array of nanometer-scale holes—they theoretically predicted stronger emission by many orders of magnitude than would ordinarily be possible in conventional Smith-Purcell radiation. They experimentally recorded a hundredfold increase in radiation in their proof-of-concept measurements.
The team has demonstrated the hundredfold enhancement in emission using a repurposed electron microscope to function as an electron beam source. But they say that the basic principle involved could potentially enable far greater enhancements using devices specifically adapted for this function.
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