Fig. 3
Experimental biosensing results of linearly polarized illumination on the two-EIT metamaterial. The frequencies of three transmission dips (Dip1, Dip2, Dip3) for different concentrations of (a) histidine and (d) glucose, both with (w/) and without (w/o) AuNPs. Normalized transmission peaks (Tmax) of EIT1 windows with their fitting results for different concentrations of (b) histidine and (e) glucose, both with and without AuNPs. The correlation coefficients of these fitting lines are R2EIT1 − histidine = 0.97, R2EIT1 − glucose = 0.96. Normalized transmission peaks (Tmax) of EIT2 windows with their fitting results for different concentrations of (c) histidine and (f) glucose, both with and without AuNPs. The correlation coefficients of these fitting lines are R2EIT2 − histidine = 0.95, R2EIT2 − glucose = 0.95.
