石墨烯涂层有源线的Spaser和光放大条件
Spaser and Optical Amplification Conditions in Graphene-Coated Active Wires
摘要：
本工作分析了局域表面等离子体激元（LSP）spaser的光学特性的电介质有源线涂有石墨烯单层。我们的理论结果，通过使用严格的电磁方法，说明非辐射转移之间的活性介质和局域表面等离子体的石墨烯。特别是，我们专注于在两种情况下的激光条件和LSP spaser的可调谐性：当导线是由红外/太赫兹透明的电介质材料制成时，当它是由金属类材料制成。我们分析的结果进行比较，我们使用准静态近似得到的解析表达式。我们表明，所研究的系统提出了一个高的spaser共振的几何参数，以及与石墨烯的化学势的可调谐性。
英文摘要：
This work analyzes the optical properties of a localized surface plasmon (LSP) spaser made of a dielectric active wire coated with a graphene monolayer. Our theoretical results, obtained by using rigorous electromagnetic methods, illustrate the non-radiative transfer between the active medium and the localized surface plasmons of the graphene. In particular, we focus on the lasing conditions and the tunability of the LSP spaser in two cases: when the wire is made of an infrared/THz transparent dielectric material and when it is made of a metal-like material. We analyze the results by comparing them with analytical expressions obtained by us using the quasistatic approximation. We show that the studied systems present a high tunability of the spaser resonances with the geometrical parameters as well as with the chemical potential of the graphene.
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