To predict and analyse the SERS signal intensity of each nanoparticle, we plotted the calculated near-field distribution within the intragap region (Figure ). The multi-slice plots of the SERS electromagneticenhancement factor (SERS EM-EF) demonstrate that the nano-Fanowman particles exhibit significantly stronger SERS signals compared to other nanostructures, reaching a local maximum EM-EF of 1.5 × 10 9 . A comparison of the average SERS EM-EF across the entire intragap region (Figure ) reveals that the nano-Fanowman (maximum average EM-EF = 7.2 × 10 7 ) exhibits more than a 300-fold enhancement compared to the resonant NNPs (average EM-EF = 2.4 × 10 5 ). Furthermore, the near-field plots comparing conditions of maximal versus no Fano interference-represented by an NNP-snowman structure (featuring a resonant dark mode but a nonresonant bright mode) exhibiting an average EM-EF equal to that of the resonant NNP-show an approximately 3.2-fold difference in Emax. Given that the EM-EF scales with the fourth power of the local E-field, this indicates that nano-Fanowman particles achieve significantly enhanced electric fields throughout the entire intragap region, thereby substantially increasing the relative utilisation efficiency of Raman dyes.