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. Author manuscript; available in PMC: 2020 Jan 1.
Published in final edited form as: IEEE J Sel Top Quantum Electron. 2018 Aug 17;25(1):7201707. doi: 10.1109/JSTQE.2018.2865418

Fig.2.

Fig.2.

(a) SEM image of an 8 × 8 “chessboard” array of ring-hole plasmonic interferometers with two different radius (R1 =4.25 μm and R2=4.5 μm). Scale bar: 10λm. (b) Real-time transmission signals of each interferometer in the array in response to different concentrations of glycerol-water solutions flowing on the metal surface. (c) Differential signal of 32 pairs of neighboring interferometers. (d) Enumeration of sensor resolution of each pair of neighboring interferometers. Their mean value and standard deviation are represented by m and σ, respectively. (e) Sensor resolution can be improved by averaging signals of multiple sensor pairs. (f) Real-time transmission response by averaging signals of all 32 sensor pairs.