Open AccessLight-controllable metasurface for microwave wavefront manipulation
Author(s) -
Lei Chen,
Qian Fan Nie,
Ying Ruan,
Si Luo,
Fu Ju Ye,
Chunfang Hao
Publication year - 2020
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.396802
Subject(s) - optics , photoresistor , wavefront , microwave , electromagnetic radiation , physics , light scattering , light beam , reflection (computer programming) , light intensity , optoelectronics , scattering , materials science , computer science , quantum mechanics , programming language
Applying multiple physical fields to artificial manipulate electromagnetic waves is a highly stirring research. In this paper, we creatively combine light control with microwave scattering, realizing an optically coding metasurface for beam deflection based on anomalous reflection. A photoresistor and a voltage-driven module are connected to control each row of PIN-diode-loaded unit cells, endowing the reflection phase of the elements with a strong dependence on light. Owing to the high sensitivity of photoresistor, the digital element state "0" or "1" can be switched effectively via light variation sensed by the photoresistor. By modulating the light signal, the arrangement of digital elements can be reprogrammed, generating the specific scattering field. Therefore, the electromagnetic field can be determined by the spatial distribution of light, which induces the connect with the optical information and microwave field. The simulated and experimental results demonstrate the feasibility of our design. This light-steering approach provides a dimension for electromagnetic wave modulation.