Measuring high‐efficiency perfect composite vortex beams with reflective metasurfaces in microwave band
Year: 2024
Type: article
Abstract: Optical vortex beams carrying orbit angular momentum have attracted significant attention recently. Perfect vortex beams, characterized by their topological charge-independent intensity profile, have important applications in enhancing communication capacity and optimizing particle manipulation. In this paper, metal-insulator-metal copper-coin type reflective metasurfaces are proposed to generate perfect composite vortex beams in X-band. We introduce the qualified equivalent circuit model based on the theory of transmission line to design the meta-atom of the structure. The experiments are performed to measure the far-field and near-field perfect composite vortex beams and evaluate their orbital angular momentum purity at different frequencies. The experimental results agree well with the theoretical predictions. This work provides new ideas and methods for generating high-quality metasurface-based perfect composite vortex beams in the microwave region, paving an ideal path for microwave communication systems, optical manipulation and radar detection.
Source: Nanophotonics
Authors: Jing Hong, Mengyi Ni, Zhengping Zhang, Zheng‐Da Hu, Jicheng Wang, Xiaopeng Shen, Xiong Wang, Mengmeng Li, Sergei Khakhomov
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,706
Funders: National Natural Science Foundation of China, Government of Jiangsu Province, Natural Science Foundation of Jiangsu Province, Shenzhen University, National Key Research and Development Program of China, National Key Research and Development Program of China Stem Cell and Translational Research
OpenAlex ID: W4404897734