Modular Design for Versatile Broadband Polarizing Metasurfaces with Freely Switching Functions

Song, Kun; Gong, Xuejian; Cao, Yunshan; Chen, Qiang; Ji, Ruonan; Liu, Yahong; Zhao, Xiaopeng; Zhou, Jiangfeng; Navarro‐Cía, Miguel

doi:10.1002/adfm.202215105

Cited by 3 publications

(1 citation statement)

References 54 publications

(79 reference statements)

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“…Metasurfaces, a kind of two-dimensional artificially structured materials, − are engineered to obtain properties that have not yet been found in nature and have emerged as promising candidates for electromagnetic wave manipulations. − Owing to the unprecedented opportunities to manipulate electromagnetic characteristics, a variety of metasurfaces with different functions have been investigated and realized, such as absorber, , polarization converter, , OAM generation, − and wireless power transfer . However, the functionalities of these metasurfaces rely on the variations of the physical structures of meta-atoms, which are typically fixed once designed or fabricated.…”

Section: Introductionmentioning

confidence: 99%

Single-Layer Programmable Metasurface for Manipulating Both Linearly and Circularly Polarized Electromagnetic Waves

Tian,

Shi,

et al. 2024

ACS Appl. Opt. Mater.

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Programmable metasurfaces provide an innovative scenario to carry out promising control of electromagnetic waves. However, most works focus on the manipulation of only linearly polarized (LP) or circularly polarized (CP) waves, and multilayer configurations are typically desired due to the existence of direct current biasing networks. Here, a general strategy for designing programmable metasurfaces for the manipulation of both LP and CP waves is proposed and verified. As a result, the real-time programmable manipulation of quad-LP (x-polarized, y-polarized, upolarized, v-polarized) and dual-CP (right-hand, left-hand) waves could be achieved. Moreover, by placing both the direct current biasing network and the finely designed isolation circuit on top of the metasurface, only a single dielectric layer is required for such a programmable metasurface. As an example, a single-layer programmable metasurface consisting of 16 × 16 meta-atoms is designed, fabricated, and measured. The PIN diodes incorporated into each meta-atom are used as active components to provide a 1-bit reflective phase control. By shifting the working states of each PIN diode in the meta-atom, wide-angle beam scanning can be obtained. Both the simulated and measured results verify the capacity of the proposed strategy and demonstrate that the designed single-layer programmable metasurface exhibits stable beam scanning for both LP and CP waves, enabling promising applications in future wireless communications.

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Section: Introductionmentioning

confidence: 99%

Single-Layer Programmable Metasurface for Manipulating Both Linearly and Circularly Polarized Electromagnetic Waves

Tian,

Shi,

et al. 2024

ACS Appl. Opt. Mater.

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Frequency and Angle Multiplexed Metadevices with Multifunctional Polarization Modulation

Song

Cao

Chen

et al. 2023

Adv Funct Materials

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Multifunctional polarization controllers are highly desirable in numerous fields due to their potential applications. Although the emergence of metasurfaces provides a powerful platform for manipulating the polarization of electromagnetic waves, metasurfaces have not yet enabled multifunctional controllers. Here, this work demonstrates an effective strategy to design a multifunctional polarization controller through the integration of frequency and angular multiplexing. As an experimental proof, a non‐planar dual‐multiplexed metadevice composed of a chiral metagrating array and an anisotropic metasurface is fabricated by printed circuit board technology. The experiments show that at least five distinct functions, including ultra‐broadband linear‐to‐circular polarization conversion in 2.5–6.3 GHz, ultra‐broadband linear‐to‐linear polarization conversion in 6.6–11.0 GHz, strong optical activity between 11.4 and 12.2 GHz, giant linear and circular dichroism ≈5.96 and 12.97 GHz, respectively, can be accomplished by the proposed meta‐multiplexer. Hence, the proposed metadevice can act as high‐efficiency bifunctional waveplate, polarization rotator, linear polarizer, chiral metamirror, and so on, enabling more application flexibility. The concept of integrating multidimensional multiplexing proposed here will be of great benefit to the design of novel multifunctional polarization controllers.

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Chiral Meta‐Coder for Spin Switchable Electromagnetic Camouflage and Information Authentication

Li,

Zhang,

et al. 2024

Laser & Photonics Reviews

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Electromagnetic camouflage is crucial for concealing the physical identity of the object from external electromagnetic detection, whether in military operations or civilian contexts. However, addressing the pressing issue of seamlessly transitioning between camouflage and visualization capabilities is a significant challenge. By combining chiral meta‐atoms and irregular phase encoding method, a novel chiral meta‐coder is proposed for spin switchable electromagnetic camouflage and target authentication. Different from traditional conformal strategies, this meta‐coder achieves camouflage functionality by tightly arranging meta‐atoms around the target object and encoding suitable phase sequences to shape desired wavefront. Simultaneously, the target object can also be identified by modulating the helical state of the incident wave. As a proof of concept, a chiral meta‐coder operating in camouflaging “A” shaped target object is designed and experimentally demonstrated. When exposed to right circularly polarized waves, the meta‐atoms surrounding the object can adapt the wavefront to conceal target information. The camouflaged pattern exhibits diffuse scattering in the far field and three focal patterns around the near field. Conversely, these meta‐atoms transition into a wave‐absorbing configuration, facilitating the precise identification of target information. Such a strategy may find potential applications in data security, privacy, and communication.

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Modular Design for Versatile Broadband Polarizing Metasurfaces with Freely Switching Functions

Cited by 3 publications

References 54 publications

Single-Layer Programmable Metasurface for Manipulating Both Linearly and Circularly Polarized Electromagnetic Waves

Single-Layer Programmable Metasurface for Manipulating Both Linearly and Circularly Polarized Electromagnetic Waves

Frequency and Angle Multiplexed Metadevices with Multifunctional Polarization Modulation

Chiral Meta‐Coder for Spin Switchable Electromagnetic Camouflage and Information Authentication

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