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arXiv 2109.01006cond-mat.mes-hallphysics.optics
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等离子体激元的量子内部结构

Quantum Internal Structure of Plasmons

Jinlyu Cao, H. A. Fertig, Luis Brey

摘要:

等离子体激元通常用宏观量来描述,如电场和电流。然而,作为金属的基本激发态,它们也是具有内部结构的量子物体。我们证明,这可以诱导一个固有的偶极矩,这是绑定到希尔伯特空间的等离子体激元状态的量子几何。这种{ \it量子几何偶极子}通过密度调制和电场提供了一种独特的操纵等离子体动力学的方法。作为一个具体的例子,我们证明了与非零量子几何偶极子从杂质的等离子体激元的散射是非互易的,在不同的方向倾斜在一个山谷依赖的方式。这种内部结构可用于控制二维材料中的等离子体激元轨迹。

英文摘要:

Plasmons are usually described in terms of macroscopic quantities such as electric fields and currents. However as fundamental excitations of metals they are also quantum objects with internal structure. We demonstrate that this can induce an intrinsic dipole moment which is tied to the quantum geometry of the Hilbert space of plasmon states. This {\it quantum geometric dipole} offers a unique handle for manipulation of plasmon dynamics, via density modulations and electric fields. As a concrete example we demonstrate that scattering of plasmons with non-vanishing quantum geometric dipole from impurities is non-reciprocal, skewing in different directions in a valley-dependent fashion. This internal structure can be used to control plasmon trajectories in two dimensional materials.

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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