Department of Optical Engineering, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 143-747, South Korea.
Opt Lett. 2010 Nov 15;35(22):3835-7. doi: 10.1364/OL.35.003835.
This Letter theoretically proposes and investigates an integrated plasmonic sensor that is based on a grating-assisted coupling between a surface plasmon polariton (SPP) and a dielectric waveguide (DW) mode. It consists of a glass slide with a gold film for the propagation of an SPP and a separate DW with a long-period grating. For sensing, the two parts are temporarily combined. After sensing, the former is replaceable, and so the sensor has disposability. The design procedure and analysis method for the sensor are explained. The designed sensor is shown to be very compact. Its characteristics of sensing a change of the refractive index of liquid are analyzed and discussed.
这封信件从理论上提出并研究了一种基于表面等离子体激元（SPP）与介质波导（DW）模式之间的光栅辅助耦合的集成等离子体传感器。它由一个带有金膜的玻璃片组成，用于传播 SPP，以及一个带有长周期光栅的单独 DW。为了进行感测，两部分暂时组合在一起。感测后，前者可以更换，因此传感器具有可弃置性。解释了传感器的设计过程和分析方法。所设计的传感器非常紧凑。分析和讨论了其用于感测液体折射率变化的特性。
