Fully Electronically Phase Modulation of Millimeter-Wave via Comb Electrodes and Liquid Crystal

Yang, Jun; Chu, Xiujun; Gao, Haoyu; Wang, Pengjun; Deng, Guangsheng; Yin, Zhiping; Lu, Hongbo

doi:10.1109/lawp.2021.3049870

Cited by 15 publications

(3 citation statements)

References 20 publications

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“…In our design, the time for the two stages is in the order of 10 and 200 ms, respectively. However, if the second stage (free relaxation) can also be electrically driven, the response time can be largely reduced …”

Section: Resultsmentioning

confidence: 99%

“…However, if the second stage (free relaxation) can also be electrically driven, the response time can be largely reduced. 43 It is interesting to note that a 2 and higher bit programmable metasurface can provide greater freedom in manipulating the electromagnetic wave compared to the programmable 1 bit metasurface. For a 2 bit programmable metasurface, the phase of metasurface elements is 0°, 90°, 180°, and 270°, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Flexible Terahertz Beam Manipulations Based on Liquid-Crystal-Integrated Programmable Metasurfaces

Shi

Yang

et al. 2022

ACS Appl. Mater. Interfaces

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Terahertz wave manipulations, especially the phase manipulations, through metasurfaces has attracted considerable interests. Here, we develop a terahertz beam steering device using the liquid-crystal (LC)-integrated programmable metasurface. Specifically, a reflective-type 1 bit metasurface element is designed by employing a multilayer structure composed of metallic back plate–LC–complementary split ring resonator (CSRR). Numerical simulations show that, at the optimized operation frequency of 0.675 THz, the developed metasurface element has a nearly 180° phase difference between unbiased and biased states with close reflection amplitudes. Furthermore, a one-dimensional programmable metasurface array with 32 independently controlled subarrays is designed and fabricated using the lithography technology. Both simulated and measured far-field scattering patterns of the metasurface certify the anomalous beam reflection and wide-angle beam steering performances. Nevertheless, the optimal frequency red shifts to 0.645 THz in the experiment. This work may advance the application of metasurfaces in terahertz beam manipulation devices.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Flexible Terahertz Beam Manipulations Based on Liquid-Crystal-Integrated Programmable Metasurfaces

Shi

Yang

et al. 2022

ACS Appl. Mater. Interfaces

Self Cite

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show abstract

“…voltage [13]. Rectangular slot elements with comb electrodes as the ground are used in [16] that realized a fully electronic biasing scheme in planar form. By overshooting the driving voltages, the need for low LC thickness can be avoided.…”

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confidence: 99%