a Design of the experimental setup for the spatiotemporal metastructure with an inset showing the metallization of one of the 51 disks. The dotted lines show the relative position of the neighboring disk (rotated by angle \(\pi /6\)). The relative phase between the connections and the capacitors can be modified by rotating the top bar along the direction of the arrow. b Circuit representation of the chain of disks connected via angle-controlled switches and interdigitated by grounded stators to vary their capacitance in time. c Time evolution of the time-averaged voltage dictated by the analysis of the equivalent circuit for the realized metamaterial for \(\phi = \pi /3\). d Experimentally measured time-averaged voltages along the sample for the same configuration as c. e Similar to c but for \(\phi = - \pi /3\). f Experimentally measured time-averaged voltages along the sample for the same configuration as e.