The advent of metamaterials provides a new concept of designing artificial materials, bringing vigor and vitality to advanced functional materials. Metamaterials, which are composed of periodic or quasi-periodic sub-wavelength structures (called as meta-atoms), have attracted extensive attention from the fields of optics, electronics, physics, materials and others, due to their extraordinary physical properties. This work paves a new way to intelligent metasurfaces and may find applications in health monitoring, 5G/6G communications, smart sensors, etc. With such a framework, we experimentally demonstrated and verified a prototype of such metasurface system which can be remotely controlled by the user to modify its scattering pattern. The attention intensity information is extracted as the control signal and a mapping between attention intensity and scattering pattern of the metasurface is established.
As an example, we demonstrated a RMCM whose scattering pattern can be altered dynamically according to the user’s brain waves via Bluetooth. Rather than DC voltage from power supply or AC voltages from signal generators, the metasurface is controlled by brainwaves collected in real time and transmitted wirelessly from the user. Here, we propose the concept of remotely mind-controlled metasurface (RMCM) via brainwaves. Nevertheless, most of existing PMs are wire-connected to users, manually-controlled and not real-time.
One possible path is to employ brain signal collecting technologies together with emerging programmable metasurfaces (PM), whose functions or operating modes can be switched or customized via on-site programming or pre-defined software. The power of controlling objects with mind has captivated a popular fascination to human beings.
0 kommentar(er)
