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| The tunable and reconfigurable EP sensing system operates on a single plasmonic resonator. This schematic illustration shows a conventional sensor (left, standing wave mode) in the absence of perturbations and the second-order EP sensor (right, travelling wave mode) with two dynamically movable Rayleigh scatterers. Credit: Y. Zhang, H. Hu, et al., doi 10.1117/1.APN.3.5.056004. |
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