File Name : fig.s1.pdf

Caption : fig s1. (a) simulated transmission spectra of metasurface with/without titanium layer. (b) enlarged view of the black wireframe.

File Name : fig.s2.pdf

Caption : fig. s2 the designed metasurface and resonant properties extracted from simulations. (a) simulated transmission spectra with different distances between ssrs and cw. (b) q factor and (c) resonance intensity variations of two modes with different distances between ssrs and cw, with the other parameters fixed. (d) simulated transmission spectra with different cut sizes of srrs. (e) q factor and (f) resonance intensity variations of two modes with different cut size of srrs, with the other parameters fixed.

File Name : fig.s3.pdf

Caption : fig. s3. optical micrographs of (a-d) escherichia coli, (e-f) staphylococcus aureus deposited onto the thz metasensor, with four concentrations including 5×10^4 cfu/ml, 1×10^5 cfu/ml, 5×10^5 cfu/ml, and 1×10^6 cfu/ml, respectively.

File Name : fig.s4.pdf

Caption : fig. s4 measured sensing performances of the mode ii. experimental transmission spectra of (a) escherichia coli and (b) staphylococcus aureus with different concentrations. extracted (c) frequency-shift and (d) relative amplitude-modulation of two bacteria with different concentrations for two modes. the error bar represents standard deviations calculated from three measurements.