Using advanced fabrication techniques, engineers have built a nanosized device out of silver crystals that can generate light by efficiently ‘tunneling’ electrons through a tiny barrier. The work brings plasmonics research a step closer to realizing ultra-compact light sources for high-speed, optical data processing and other on-chip applications.
The device emits light by a quantum mechanical phenomenon known as inelastic electron tunneling. In this process, electrons move through a solid barrier that they cannot classically cross...
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