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- 2016
电子注激励石墨烯表面等离子体激元的研究
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Abstract:
对垂直与平行运动电子注激励石墨烯表面等离子体激元进行了详细分析与对比。理论分析与数值计算的结果表明,电子注垂直激励时,石墨烯表面等离子体激元包含丰富的频率分量,沿传播方向衰减,并伴随有度越辐射;平行激励时,其工作频率可通过调节电子注能量或石墨烯化学势进行调谐,且沿传播方向没有衰减,没有渡越辐射。优化电子注能量与石墨烯化学势等参数可使电子注激励的石墨烯表面等离子体激元具有最大功率。电流密度大于500 A/cm2的直流电子注可与石墨烯表面等离子体激元发生注波互作用,从而对其进行持续地激励并放大。
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