Research Advance on the Sensing Characteristics of Refractive Index Sensors Based on Electromagnetic Metamaterials

Figure 5

(a) Schematic diagram of EIT metamaterials. (b) Simulated transmission profile versus frequency. (c) Modulation of the transparent window when the coupling distance varies. (d) Transmission spectra at different silicon conductivities. (a–d) Reproduced with permission from reference [38] copyright 2019, Springer Nature.

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