The impact of loss on the plasmonic resonances in metal–insulator–metal slits is analyzed, particularly the significant effect of loss on the reflection phase. The reflection is calculated analytically using single mode matching theory with the unconjugated form of the orthogonality relation. This theoretical calculation agrees well with comprehensive simulations, but differs substantially from the conjugated orthogonality result, as was used in past analytical works. This reflection phase has a large impact on the plasmonic resonance wavelengths, which are calculated using a Fabry–Pérot theory and compared with past experiment and finite-difference time-domain simulations.

分析了损耗对金属-绝缘体-金属狭缝中等离子体共振的影响，特别是损耗对反射相位的显着影响。反射是使用单模匹配理论和正交关系的非共轭形式分析计算的。这种理论计算与综合模拟非常吻合，但与过去分析工作中使用的共轭正交性结果有很大不同。该反射相位对等离子体共振波长有很大影响，这些波长是使用 Fabry-Pérot 理论计算的，并与过去的实验和有限差分时域模拟进行比较。