Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA.
Nano Lett. 2010 Aug 11;10(8):3173-8. doi: 10.1021/nl102078j.
This paper describes three-dimensional (3D) nanohole arrays whose high optical transmission is mediated more by localized surface plasmon (LSP) excitations than by surface plasmon polaritons (SPPs). First, LSPs on 3D hole arrays lead to optical transmission an order of magnitude higher than 2D planar hole arrays. Second, LSP-mediated transmission is broadband and more tunable than SPP-enhanced transmission, which is restricted by Bragg coupling. Third, for the first time, two types of surface plasmons can be selectively excited and manipulated on the same plasmonic substrate. This new plasmonic substrate fabricated by high-throughput nanolithography techniques paves the way for cutting-edge optoelectronic and biomedical applications.
本文描述了三维(3D)纳米孔阵列,其高光传输更多是由局域表面等离子体(LSP)激发介导的,而不是表面等离子体激元(SPP)介导的。首先,3D 孔阵列上的 LSP 导致光传输比 2D 平面孔阵列高一个数量级。其次,与受布拉格耦合限制的 SPP 增强传输相比,LSP 介导的传输具有更宽的带宽和更高的可调谐性。第三,首次可以在同一等离子体基片上选择性地激发和操纵两种类型的表面等离子体。这种通过高通量纳米光刻技术制造的新型等离子体基片为光电和生物医学应用开辟了道路。