Light-sensing metasurface with flexible reprogrammable functions.

For the research of metasurfaces, there have been previous studies on scattering that combine light-filed with microwave, but it can only be modulated by controlling each column of metasurface elements. In this paper, we propose a light-sensing metasurface that realizes the independent regulation of arbitrary elements on the metasurface to obtain distinct electromagnetic (EM) functions. By integrating PIN diodes in the 1-bit coding metasurface for phase-response modulation. Each metamaterial unit is embedded with a photoresistor, which can independently sense optical information and convert optical signals into electrical signals. The micro control module directly reflects the change of electrical signal to the PIN diode on the metasurface, forming a pattern of different phase distribution. To verify this idea, four patterns are designed and introduced in this paper. Through simulation and measurement, the experimental results show good agreement with the simulations, which verifies the feasibility of this scheme. [ABSTRACT FROM AUTHOR]