Physical-Model-Based Wave Control in Metasurface-Programmable Complex Systems: Theory, Model Calibration, and Applications

I discuss our recent results on (i) various equivalent formulations of compact physics-compliant models of wave scattering in metasurface-programmable complex media in terms of coupled dipoles, scattering matrices or impedance matrices; (ii) how to estimate these models’ parameters in full-wave simulations or experimentally in frugal manners (e.g., with phase-insensitive measurements) and with minimal ambiguity; (iii) some applications to previously inaccessible wave control functionalities (e.g., tuning a reconfigurable chaotic cavity to a coherent perfect absorption (CPA) state and identifying the CPA wavefront without ever measuring phase) and optimal blind non-invasive focusing on perturbation-inducing targets in complex media.