Abstract
Diffraction orders at the Pancharatnam-Berry metasurface are efficiently switched by applying voltage. A liquid crystal layer introduced acts as a half-wave phase plate to exchange left- and right-circular polarizations of light. Applied voltage turns the polarization exchange on and off, causing redistribution of the intensity between the -1 and +1 diffraction orders. The proposed novel, to our knowledge, structure features a multilayer substrate that supports the Tamm plasmon polaritons, enabling the integration of both resonant and non-resonant phase-change mechanisms. (c) 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.