Researchers in Japan have used electron-beam excitation in an AlGaN/AlGaN quantum-well structure to demonstrate the emission of ultraviolet light at record-breaking efficiency, giving hope for the realization of high-power efficient semiconductor sources of deep-ultraviolet light.
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Schubert, E., Cho, J. Electron-beam excitation. Nature Photon 4, 735–736 (2010). https://doi.org/10.1038/nphoton.2010.254
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DOI: https://doi.org/10.1038/nphoton.2010.254