论文标题
石墨烯 - 2D Ferromagnet异质结构中强烈耦合的磁量极化子
Strongly coupled magnon-plasmon polaritons in graphene- 2D ferromagnet heterostructures
论文作者
论文摘要
镁和等离子体是两种非常不同类型的集体模式，分别作用于自旋和电荷自由度。乍一看，等离激元和磁系统异质结构中的杂化等离子体 - 马格诺孔的形成将面临两个挑战，即通过齐曼耦合等离子体的电磁场与旋转的电磁场与旋转的小相互作用，并且在大多数能量不合格中，在大多数系统中，等离能量比EV范围更大。在这里，我们表明石墨烯等离子体与二维铁磁绝缘子的镁质形成极化子，最多可分开至一半微米，兔耦合在100 GHz的范围内（大于腔QED镁）。这种强的耦合既可以通过石墨烯等离子体的少量能量和相匹配提供的等离激元 - 麦克农耦合的合作超速度性质来促进。我们表明，RABI耦合可以在电气和机械上调节，并提出了一个减弱的总内反射实验，以在2D铁磁体上实施由等离子体激发驱动的2D铁磁体的铁磁共振实验。
Magnons and plasmons are two very different types of collective modes, acting on the spin and charge degrees of freedom, respectively. At first sight, the formation of hybrid plasmon-magnon polaritons in heterostructures of plasmonic and magnetic systems would face two challenges, the small mutual interaction, via Zeeman coupling of the electromagnetic field of the plasmon with the spins, and the energy mismatch, as in most systems plasmons have energies in the eV range, orders of magnitude larger than magnons. Here we show that graphene plasmons form polaritons with the magnons of two-dimensional ferrromagnetic insulators, placed up to to half a micron apart, with Rabi couplings in the range of 100 GHz (dramatically larger than cavity QED magnonics). This strong coupling is facilitated both by the small energy of graphene plasmons and the cooperative super-radiant nature of the plasmon-magnon coupling afforded by phase matching. We show that the Rabi coupling can be modulated both electrically and mechanically and we propose a attenuated total internal reflection experiment to implement ferromagnetic resonance experiments on 2D ferromagnets driven by plasmon excitation.
