无界量子等离子体半空间上的多重表面等离子体激元
Multiple surface plasmons on an unbounded quantum plasma half-space
摘要：
研究了无外约束条件下表面等离子体激元在量子等离子体半空间中的传播。利用量子流体力学模型，在静电极限下，发现平衡态密度分布是一个光滑的连续函数，在线性区域，它支持多个非正常表面模。定义一个谱函数，并使用切割条件，这些模式的色散关系和现实的动力学的相关性进行计算。结果表明，多重表面等离子体相对于完全束缚的量子等离子体存在明显的红移。
英文摘要：
The propagation of surface plasmons on a quantum plasma half-space in the absence of any external confinement is investigated. By means of Quantum Hydrodynamic Model in the electrostatic limit it is found that the equilibrium density profile is a smooth continuous function which, in the linear regime, supports multiple non-normal surface modes. Defining a spectrum function and using a cutting condition, the dispersion relations of these modes and their relevance for realistic dynamics are computed. It is found that the multiple surface plasmons present a significant red-shift with respect to the case of fully bounded quantum plasmas.
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