Fig. 1: Plasmonic characterisation of the SERS nanofibre optical sensor.

A, C Investigating the effect of transverse magnetic (TM) and transverse electric (TE) light reflectance on electric field enhancement. Simulated spatial electric field (| E |) distributions in x-z (B) and y-z (D) planes for four wavelengths. Bottom panels in (B) and (D) provide localised magnifications for a more detailed analysis of LSPR and FP resonance modes. For (D), the calculated length in the y-direction is \(\sqrt{3}\)P, corresponding to the triangular lattice.