纳米等离子体重整化与库仑相互作用的增强
Nanoplasmonic Renormalization and Enhancement of Coulomb Interactions
摘要：
已知纳米结构等离子体金属系统极大地增强各种辐射和非辐射光学过程，线性和非线性的，这是由于分子或半导体中的电子与表面等离子体的增强的局部光场的相互作用。主要不同的是许多多体现象，这些现象是由于带电粒子之间的库仑相互作用：载流子（电子和空穴）和离子。这些包括载流子-载流子或载流子-离子散射，能量和动量转移（包括拖曳效应），热平衡，激子形成，碰撞电离，俄歇效应等，这是没有被广泛认识到，这些和其他多体效应也可以修改和增强的表面等离子体局部场。在这类多体现象中，有一类特殊但极其重要的现象是由金属表面的化学反应构成的，包括催化反应。在这里，我们提出了一个通用的和强大的理论的等离子体增强的多体现象，从而在一个封闭的表面等离子体修饰库仑相互作用的表达。我们说明了这个理论，通过计算这种修饰的相互作用明确的一个重要的例子，金属-电介质纳米壳，表现出达到共振行为的幅度和相位。这种相互作用是用来描述的nanoplasmonic增强的Foerster能量转移之间的量子点在附近的一个等离子体纳米壳。催化在纳米结构的金属表面，非局部载流子散射和表面增强拉曼散射之间的库仑相互作用的nanoplasmonic重整化的其他影响和应用进行了讨论可能是最重要的。
英文摘要：
Nanostructured plasmonic metal systems are known to enhance greatly variety of radiative and nonradiative optical processes, both linear and nonlinear, which are due to the interaction of an electron in a molecule or semiconductor with the enhanced local optical field of the surface plasmons. Principally different are numerous many-body phenomena that are due to the Coulomb interaction between charged particles: carriers (electrons and holes) and ions. These include carrier-carrier or carrier-ion scattering, energy and momentum transfer (including the drag effect), thermal equilibration, exciton formation, impact ionization, Auger effects, etc. It is not widely recognized that these and other many-body effects can also be modified and enhanced by the surface-plasmon local fields. A special but extremely important class of such many-body phenomena is constituted by chemical reactions at metal surfaces, including catalytic reactions. Here, we propose a general and powerful theory of the plasmonic enhancement of the many-body phenomena resulting in a closed expression for the surface plasmon-dressed Coulomb interaction. We illustrate this theory by computing this dressed interaction explicitly for an important example of metal-dielectric nanoshells, which exhibits a reach resonant behavior in both the magnitude and phase. This interaction is used to describe the nanoplasmonic-enhanced Foerster energy transfer between nanocrystal quantum dots in the proximity of a plasmonic nanoshell. Catalysis at nanostructured metal surfaces, nonlocal carrier scattering and surface-enhanced Raman scattering are discussed among other effects and applications where the nanoplasmonic renormalization of the Coulomb interaction may be of principal importance.
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