Dabing Li, Mark I. Stockman
We consider theoretically the spaser excited electrically via a nanowire with ballistic conductance. We show that in the extreme quantum regime, i.e., for a single conductance-quantum nanowire, the spaser with the core made of common plasmonic metals, silver and gold, is fundamentally possible. For ballistic nanowires with multiple-quanta or non-quantized conductance, the performance of the spaser is enhanced in comparison with the extreme quantum limit.
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http://arxiv.org/abs/1211.0366
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