We investigate the emergence of self-hybridized thermal magnetoplasmons in doped graphene nanodisks at finite temperatures upon being subjected to an external magnetic field. Using a semianalytical approach, which fully describes the eigenmodes and polarizability of the graphene nanodisks, we show that the hybridization originates from the coupling of transitions between thermally populated Landau levels and localized magnetoplasmon resonances of the nanodisks. Owing to their origin, these modes combine the extraordinary magneto-optical response of graphene with the strong field enhancement of plasmons, making them an ideal tool for achieving strong chiral light–matter interactions, with the additional advantage of being tunable through carrier concentration, magnetic field, and temperature. As a demonstration of their capabilities, we show that the thermal magnetoplasmons supported by an array of graphene nanodisks enable chiral perfect absorption and chiral thermal emission.

中文翻译：

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石墨烯纳米盘中手性光-物质与热磁等离子体的相互作用


我们研究了在有限温度下掺杂石墨烯纳米盘中受到外部磁场时出现的自杂化热等离子体。使用完全描述石墨烯纳米片的特征模态和极化率的半分析方法，我们表明杂交起源于热填充的 Landau 能级和纳米片的局部磁等离子共振之间的过渡耦合。由于它们的起源，这些模式结合了石墨烯非凡的磁光响应和等离激元的强场增强，使它们成为实现强手性光-物质相互作用的理想工具，并具有可通过载流子浓度、磁场和温度进行调整的额外优势。为了证明它们的能力，我们展示了由一系列石墨烯纳米盘支撑的热等离子体能够实现手性完美吸收和手性热发射。