Low-profile and compact retroreflector enabled by a wide-angle and high-efficiency metalens

Liu, Yongqiang; Guo, Jie; Li, Sheng; Qi, Kainan; Li, Liangsheng; Yin, Hongcheng

doi:10.1016/j.optmat.2022.113105

Cited by 9 publications

(2 citation statements)

References 44 publications

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“…An essential characteristic of electromagnetic waves is the manipulation and control of polarization, which is a key focus of researchers who want to do this through the building of subwavelength artificial structures. Polarization has been employed in various applications, including displays [1][2][3][4], metasurface based antennas [5][6][7], medical imaging [8,9], and radio frequency RF communications [10][11][12]. According to conventional methods, to dictate the polarization in crystals is heavily reliant on optical activity, which serves as a crucial parameter.…”

Section: Introductionmentioning

confidence: 99%

An angular stable ultra-broadband asymmetric transmission chiral metasurface with efficient linear-polarization conversion

Ahmed,

Cao,

Khan

et al. 2024

Phys. Scr.

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In this paper, a chiral metasurface is presented to effectively attain an ultra-broadband operation of asymmetric transmission with highly efficient cross-polarization conversion. The efficiency of the asymmetric transmission operation in the frequency band ranging from 6.5 to 13 GHz is above 70%. Additionally, in the frequency range from 3.7 to 14 GHz, the cross-polarization conversion realizes greater than 90% polarization conversion ratio. Asymmetric transmission as well as cross-polarization conversion show angular stability against the incident angle of electromagnetic waves up to 45°. To validate the simulation results, the fabricated chiral metasurface is tested and compared with simulation results. The concepts of asymmetric transmission and linear-polarization conversion are demonstrated and physically explained through the distributions of surface currents over metallic layers. This anticipated work has significant applications in telecommunications and radar, as well as potential use in equipment designed for the manipulation of electromagnetic waves.

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Section: Introductionmentioning

confidence: 99%

An angular stable ultra-broadband asymmetric transmission chiral metasurface with efficient linear-polarization conversion

Ahmed,

Cao,

Khan

et al. 2024

Phys. Scr.

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“…One of the key characteristics of electromagnetic (EM) waves is polarization, which demonstrates electric field behavior in different materials. Polarization has been used in different applications of holographic displays [1,2], meta-lens antennas [3][4][5], imaging [6], and wireless communications [7]. In the past, the traditional approaches used to control polarization included chiral liquid crystals, the Faraday effect, and birefringent crystals [8,9].…”

Section: Introductionmentioning

confidence: 99%

An ultra-thin multifunctional chiral metasurface with asymmetric transmission, cross-polarization conversion, and circular dichroism for Ku- and K-band applications

Ahmed,

Cao,

Khan

et al. 2023

J. Phys. D: Appl. Phys.

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In this paper, a bi-layered ultra-thin multifunctional chiral metasurface is proposed to obtain asymmetric transmission (AT), cross-polarization conversion (CPC), and circular dichroism (CD). The multifunctional chiral metasurface realizes AT with more than 70% efficiency over a frequency range of Ku-band from 14.3 to 15.8 GHz, while in the operating frequency band from 13.5 to 16.2 GHz, the CPC ratio is above 90%. In addition, the metasurface exhibits CD in the K-band with a CD parameter of 0.6 at 24 GHz. Furthermore, the functionalities of AT and CPC are stable for changes in incident angle up to 60° for both transverse-electric (TE) and transverse-magnetic (TM) electromagnetic (EM) waves. For verification of the anticipated concept, the proposed chiral metasurface is fabricated and measured. The proposed design can be used for potential applications in the Ku- and K-bands for satellite communication and radar.

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A compact wide-angle DUV lens suitable for SO2 monitoring

Shinohara

Empizo

Yamamoto

et al. 2023

Optik

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Low-profile and compact retroreflector enabled by a wide-angle and high-efficiency metalens

Cited by 9 publications

References 44 publications

An angular stable ultra-broadband asymmetric transmission chiral metasurface with efficient linear-polarization conversion

An angular stable ultra-broadband asymmetric transmission chiral metasurface with efficient linear-polarization conversion

An ultra-thin multifunctional chiral metasurface with asymmetric transmission, cross-polarization conversion, and circular dichroism for Ku- and K-band applications

A compact wide-angle DUV lens suitable for SO2 monitoring

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