Willingham Britain, Link Stephan
Department of Chemistry, Rice University, Houston, Texas 77005, USA.
Opt Express. 2011 Mar 28;19(7):6450-61. doi: 10.1364/OE.19.006450.
We investigate the propagation of surface plasmon polaritons through coupling of light to sub-radiant dipole modes in finite chains of Ag nanoparticles. End excitation of collections of closely spaced particles reveals a band of sub-radiant modes whereby the decay of surface plasmon polaritons due to radiative losses is minimized. We show that excitation of any of these sub-radiant modes results in the most efficient energy transfer throughout the optical spectrum, with smaller interparticle separations resulting in the longest propagation.
我们研究了表面等离激元极化激元通过光与银纳米颗粒有限链中的亚辐射偶极子模式耦合的传播情况。对紧密排列的粒子集合进行末端激发揭示了一个亚辐射模式带，通过该模式，表面等离激元极化激元由于辐射损耗导致的衰减被最小化。我们表明，激发这些亚辐射模式中的任何一种都会在整个光谱范围内实现最有效的能量转移，粒子间间距越小，传播距离越长。
