A metamaterial lens based on transformation optics for horizontal radiation of OAM vortex waves - Université Paris Nanterre Access content directly
Journal Articles Journal of Applied Physics Year : 2021

A metamaterial lens based on transformation optics for horizontal radiation of OAM vortex waves

Jianjia Yi
Zhe Shi
  • Function : Author
Die Li
  • Function : Author
Chenchen Liu
  • Function : Author
Haoxiang Sun
Lina Zhu
Xiaoming Chen

Abstract

Vortex electromagnetic waves carrying orbital angular momentum (OAM) have been widely discussed for potential applications in wireless communications. Belonging to the Laguerre–Gaussian beams family, such type of waves present a hollow conical shape and divergence characteristics along with a directional radiation. In this paper, an innovative method to produce omnidirectional OAM beams based on spatial transformation is proposed at microwave frequencies. As a proof-of-concept demonstration, a lens with omnidirectional radiation in the horizontal plane is designed and simulated with an incident vortex beam carrying the OAM mode l = +2. The designed lens can be potentially implemented with an all-dielectric medium showing a gradient permittivity distribution. Furthermore, the proposed lens presents good performances over a wide operational bandwidth spanning from 8 to 17 GHz. By converting the directional beam to an omnidirectional one, the proposed method opens the door to the potential development of microwave vortex antenna systems.
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Dates and versions

hal-04177657 , version 1 (05-08-2023)

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Jianjia Yi, Zhe Shi, Die Li, Chenchen Liu, Haoxiang Sun, et al.. A metamaterial lens based on transformation optics for horizontal radiation of OAM vortex waves. Journal of Applied Physics, 2021, 129 (10), ⟨10.1063/5.0027465⟩. ⟨hal-04177657⟩
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