Fig. 4: Prediction of dependence on metasurface configuration for scattering coefficients not included in calibration data. | Nature Communications

Fig. 4: Prediction of dependence on metasurface configuration for scattering coefficients not included in calibration data.

From: Experimentally realized physical-model-based frugal wave control in metasurface-programmable complex media

Fig. 4

a–c Measured ground truth and Green’s-function-retrieval physical-model (GFR-Model) predictions for three unseen scattering coefficients (for ten random unseen metasurface configurations). The GFR-Model was calibrated with transmit and receive information from ports 1 and 2, but receive-only information from ports 3 and 4, i.e., without any information about \({S}_{33}\), \({S}_{34}\), \({S}_{43}\), \({S}_{44}\). The predictions of the unseen scattering coefficients suffer from a systematic constant offset (independent of the metasurface configuration), indicated by the line connecting the centers of the ground-truth cloud and the predicted cloud. d–f Upon correction of the systematic offset, the physical model predicts the unseen scattering coefficients with high fidelity.

Back to article page