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arXiv 1902.07034physics.optics
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通过激发石墨烯波导表面等离子体激元对电磁能量传递的空间调制

Spatial modulation of the electromagnetic energy transfer by excitation of graphene waveguide surface plasmons

Julieta Olivo, Carlos J. Zapata--Rodríguez, Mauro Cuevas

摘要:

我们从理论上研究了石墨烯波导附近施主和受主分子之间的电磁能量转移。由该结构支撑的表面等离子体激元(SP)提供衰变通道,当施主和受主位于波导的同一侧或甚至相对侧时,该衰变通道导致能量转移速率的改善。通过将积分路径变形为复平面中的合适路径来计算与不存在波导时的能量传递率值相比的能量传递率的修改。我们的研究结果表明,这种修改显着增强时,激发的对称和反对称SP。由于这些SP通道之间的相干干扰的能量转移的空间依赖性的显着影响,这可以通过调整化学势的变化,突出和讨论的SP传播特性。

英文摘要:

We theoretically study the electromagnetic energy transfer between donor and acceptor molecules near a graphene waveguide. The surface plasmons (SPs) supported by the structure provide decay channels which lead to an improvement in the energy transfer rate when the donor and acceptor are localized on the same side or even on opposite sides of the waveguide. The modification of the energy transfer rate compared to its value in absence of the waveguide are calculated by deforming the integration path into a suitable path in the complex plane. Our results show that this modification is dramatically enhanced when the symmetric and antisymmetric SPs are excited. Notable effects on the spatial dependence of the energy transfer due to the coherent interference between these SP channels, which can be tuned by chemical potential variations, are highlighted and discussed in terms of SP propagation characteristics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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