论文标题
基于通过纳米光子结构的漏光光的等离子体传感器
Plasmonic sensors based on funneling light through nanophotonic structures
论文作者
论文摘要
我们提出了一种折射率传感器，该传感器是一堆具有下波长特征的金属光栅，并嵌入了低索引介电介质中。通过漏斗机制极大地限制了光，并激发了感知分析物介质的共振。比较了结构的两个终止。其中一个具有与分析物接触的介电介质，并利用结构的选择性光谱传递。另一个设计具有金属连续层，该层在金属/分析物界面处产生表面等离子体的共振。这两种设计都具有狭窄的光谱特征，这些特征对分析物的折射率变化明智，可用于感测生物医学样品。
We present a refractometric sensor realized as a stack of metallic gratings with subwavelength features and embedded within a low-index dielectric medium. Light is strongly confined through funneling mechanisms and excites resonances that sense the analyte medium. Two terminations of the structure are compared. One of them has a dielectric medium in contact with the analyte and exploits the selective spectral transmission of the structure. The other design has a metallic continuous layer that generates surface plasmon resonances at the metal/analyte interface. Both designs respond with narrow spectral features that are sensible to the change in the refractive index of the analyte and can be used for sensing biomedical samples.
