Surface plasmon-polaritons are electromagnetic modes that can be excited at a conducting-dielec-tric interface [1]. The engineering of surface plasmon resonance (SPR) based devices is a milestone in the development of optical sensors. The ability to construct an all-optical system to confine lightwave power at subwavelength dimensions with higher levels of sensitivity and resolution in a broad spectral range are the central features that have attracted a rapid-growing interest in SPR sensors [2]. Particularly, minute variations in the refractive index of the surrounding medium (also known as analyte) change significantly the characteristics of the electromagnetic fields of a surface plasmon mode. As a consequence, the spectral shifts in the mode phase and also losses variations in the associated confined power can be used to detect analyte properties that are described in terms of the refractive index [3].

中文翻译：

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基于多等离子体共振的传感器，用于使用 D 形光子晶体光纤表征光色散


表面等离子体激元是可以在导电-电介质界面处激发的电磁模式[1]。基于表面等离子共振 (SPR) 的设备工程是光学传感器发展的里程碑。构建全光学系统以将光波功率限制在亚波长维度，并在宽光谱范围内具有更高水平的灵敏度和分辨率的能力是引起人们对 SPR 传感器快速增长的兴趣的核心特征 [2]。特别地，周围介质（也称为分析物）的折射率的微小变化显着改变表面等离子体模式的电磁场的特性。因此，模式相位的光谱偏移以及相关受限功率的损耗变化可用于检测用折射率描述的分析物特性 [3]。