Nanoscale light source can change its colour –

An international collaboration claims to have made the first tuneable nanoscale light source that is driven by free electrons. Light is created by directing a beam of electrons through a tiny aperture that has been drilled into a stack of alternating gold and silicon-dioxide layers. Interaction between the electron beam and the alternating layers generates visible and infrared light emission.

viaNanoscale light source can change its colour –

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