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Surface plasmon amplification by the stimulated emission of radiation (spaser) in plasmonic nanocavities as a novel concept has quickly advanced in recent years. Understanding the nature and mechanism of the spaser system is important for both fundamental studies and the development of new applications. We theoretically investigate the spaser made from a plasmonic nano-antenna embedded with active...
This paper reports the formation of uniform single layer micro-patterns of graphene on a glass substrate using direct femtosecond laser cutting. The cutting of graphene was achieved in air and argon. By translating the graphene sample with respect to the laser beam, continuous micro-channels were carved. The cutting geometry can be controlled by varying the laser fluence and the scanning path. Also,...
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