Fano共振效应是一种具有非对称线型的共振散射现象，起源于共振过程和非共振过程的量子干涉效应。近年来，在等离子体纳米结构中Fano共振现象也被发现，并成为纳米光子学的一个研究热点。等离子体Fano共振通常具有较窄的光谱线宽，且不能直接与入射光耦合，只能局域在近场，强的近场局域特性可以获得巨大的表面电磁场增强。由于等离子体Fano共振独特的光学特性，已经被应用到单分子探测、高灵敏度传感、增强光谱、完美吸收、电磁诱导透明和慢光光子学器件等众多领域当中。

Fano resonance is a resonance scattering phenomenon with an asymmetric spectral line shape, which originated from the quantum interference between resonant and non-resonant paths. Recently, Fano resonance in plasmonic nanostructures has been observed and developed to a research hotspot in nanophotonics. Plasmonic Fano resonance usually exhibits a narrow spectral line width, and cannot be excited by incident light and localizes at near field regions with a large electromagnetic field congregation and enhancement. Due to its special optical properties, Fano resonance has wide and significant applications in the areas such as single-molecule detection, high sensitivity sensing, enhanced spectrum, perfect absorption,  electromagnetically induced transparency and slow-light photonic devices.