Description
Electromagnetic waves, defined by phase, frequency, amplitude, and polarization, are vital for applications like microfabrication and sensing. Conventional optical setups struggle with polarization control and efficiency, limiting chip integration. Metasurfaces offer a solution for complex wave manipulations and on-chip integration, but metal ohmic losses reduce the efficiency of SW-excited devices.This work adopts a divide-and-conquer strategy. First, a dielectric metasurface achieves high-efficiency (92%) decoupling of surface waves to free-space radiation, avoiding ohmic loss. Second, a complex-amplitude metasurface enhances multidimensional control (polarization, phase, amplitude), generating near-field foci, Airy beams, and vector holograms. Together, these approaches establish a platform from efficient radiation to multifunctional control, advancing integrated terahertz photonics.
