Fig. 2
From: Critical coupling in plasmonic chain for efficient energy trapping
(a) Measured transmittance at different lateral positions (y-pos) of the 10 NP chain (sample H2). (b) Measured transmittance with high frequencies filtered for clarity. A 4th order Butterworth digital filter has been used with a frequency cutoff ten times smaller than the sampling frequency. The filter has been implemented in Python in the library SCIPY28. (c) Minimum transmittance reached at the resonance for different values of y-pos: experimental values are represented by trefles and error bars corresponding to two times the transmittance standard deviation calculated. Curves are the minimum transmittance from FDTD simulations for different values of hox. (d) Transmittance calculated by FDTD simulation for hox = 65 nm and various values of y-pos, the resonance bandwidth reduces as the chain-waveguide distance increases.
