基于时变数字编码感应磁惠更斯超表面的电磁谐波柔性控制

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-06-13 DOI:10.1016/j.optcom.2025.132121

Qian He, Bingxue Zhang, Ping Han, Di Jia, Zhengren Zhang

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引用次数: 0

摘要

时变数字编码超表面可以同时实现高效的变频和谐波控制，极大地扩展了电磁波操纵的自由度。该技术在雷达探测和无线通信等多个领域显示出巨大的潜力。传输型时变数字编码元表面由于能够更自然地传输信号，同时减少信号失真和干扰，近年来引起了广泛的关注。然而，构建高效的传输型时变数字编码元曲面，实现柔性连续谐波控制仍然是一个挑战。提出了一种与PIN二极管集成的感应磁性惠更斯超表面的十字形结构。当PIN二极管处于“ON”和“OFF”状态时，在12.88 GHz频率下通过超表面的透射波表现出接近π的高传输幅值和相位差。通过引入时变信号，赋予每列超表面单元一个时滞梯度，成功构建了1位时变数字编码诱导磁惠更斯超表面。通过设计不同的梯度编码方式，实现了传输谐波的柔性连续控制。为设计传输型时变数字编码元曲面实现谐波的灵活连续控制提供了解决方案，从而拓展了时变数字编码元曲面的应用潜力。

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Flexible control of electromagnetic harmonics based on time-varying digital-coded induced-magnetism Huygens' metasurfaces

Time-varying digital coding metasurfaces can simultaneously achieve efficient frequency conversion and harmonic control, greatly expanding the degree of freedom for electromagnetic wave manipulation. This technology has shown significant potential in various fields such as radar detection and wireless communication. Transmission-type time-varying digital coding metasurfaces have attracted considerable attention in recent years due to their ability to transmit signals more naturally while reducing signal distortion and interference. However, constructing efficient transmission-type time-varying digital coding metasurface and achieving flexible and continuous harmonic control remain a challenge. This paper proposes a cross-shaped structure of induced-magnetism Huygens' metasurface integrated with PIN diodes. When the PIN diodes are in the “ON” and “OFF” states, the transmitted waves through the metasurface at a frequency of 12.88 GHz show equal high transmission amplitude and phase difference approaching

π

. By introducing time-varying signals, each column of metasurface units is endowed with a time delay gradient, a 1-bit time-varying digital coding induced-magnetism Huygens' metasurface is successfully constructed. Through the design of different gradient encoding modes, flexible continuous control of transmitted harmonic waves is demonstrated. This work provides a solution for designing transmission-type time-varying digital coding metasurfaces to achieve flexible and continuous control of harmonics, thereby expanding the application potential of time-varying digital coding metasurfaces.

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.