The Blackett Laboratory, Department of Physics, Imperial College London, London, UK.
Nano Lett. 2010 Jul 14;10(7):2574-9. doi: 10.1021/nl101235d.
On the basis of conformal transformation, a general strategy is proposed to design plasmonic nanostructures capable of an efficient harvesting of light over a broadband spectrum. The surface plasmon modes propagate toward the singularity of these structures where the group velocity vanishes and energy accumulates. A considerable field enhancement and confinement is thus expected. Radiation losses are also investigated when the structure dimension becomes comparable to the wavelength.
基于共形变换，提出了一种设计能够在宽光谱范围内高效收集光的等离子体纳米结构的一般策略。表面等离激元模式朝着这些结构的奇点传播，在奇点处群速度为零，能量积累。因此，可以预期会有相当大的场增强和限制。当结构尺寸与波长可比时，还研究了辐射损耗。
