Code Division Multiplexing Inspired Dynamic Metasurface Holography. (19th June 2021)

• Record Type: Journal Article
• Authors: Li, Xin; Zhao, Ruizhe; Wei, Qunshuo; Geng, Guangzhou; Li, Junjie; Zhang, Shuang; Huang, Lingling; Wang, Yongtian
• Is Part Of: Advanced functional materials. Volume 31:Number 35(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-06-19
• Subjects: holography -- metasurfaces -- optical code division multiplexing; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202103326
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Metasurface holography is attracting increasing attention owing to its numerous advantages over conventional holography techniques, such as precise control of phase profiles, compact sizes, and multiple information channels via a single optical element. Metasurfaces provide a flexible platform for incorporating various multiplexing techniques. Inspired by code division multiplexing (CDM), which is widely employed in networking and wireless digital communications, metasurface holography for generating dynamic holographic images controlled by both the patterned beam profiles and polarization states is designed and realized in this study. Specifically, two orthogonal polarization states and 16 code bases of light illumination are combined to generate 32 independent channels. Only the correct code reference can decode the target image for a specific channel, providing encryption for information transportation. Meanwhile, the demonstrated metasurface holography with CDM can realize active modulation via a digital micromirror device. The proposed metasurface can be utilized to achieve dynamic information display, data storage, optical encryption, and other applications in optics. Abstract : Inspired by code division multiplexing, metasurface holography for active modulation via a digital micromirror device is proposed. With the correct illumination of code pattern and polarization, independent images in 32 channels can be reconstructed, respectively. This proposed method can increase the number of multiplexing channels for a larger information capacity in the data storage, display, and other applications in optics.