Ginzton Laboratory, Department of Electrical Engineering, Stanford University, Stanford, California 94305, USA.
Phys Rev Lett. 2010 Jul 2;105(1):013901. doi: 10.1103/PhysRevLett.105.013901. Epub 2010 Jun 28.
We provide a theoretical discussion of the scattering cross section of individual subwavelength structures. We show that, in principle, an arbitrarily large total cross section can be achieved, provided that one maximizes contributions from a sufficiently large number of channels. As a numerical demonstration, we present a subwavelength nanorod with a plasmonic-dielectric-plasmonic layer structure, where the scattering cross section far exceeds the single-channel limit, even in the presence of loss.
我们提供了对单个亚波长结构的散射截面的理论讨论。我们表明，原则上，只要最大化足够多的通道的贡献，就可以实现任意大的总截面。作为数值演示，我们提出了一种具有等离子体-介电-等离子体层结构的亚波长纳米棒，其中散射截面远远超过单通道极限，即使存在损耗。
