Direction-dependent polarization modulation of Cherenkov diffraction radiation based on metasurfaces

Xu, Wenxia; Li, Wenjia; Jiang, Zhaoqi; Sun, Bo-Tian; Qin, Chunhua; Lv, Bo; Guan, Chunying; Liu, Jianlong

doi:10.1063/5.0109322

Cited by 3 publications

(1 citation statement)

References 41 publications

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“…Furthermore, it is important to note that the proposed laser-direct-writing treatment is compatible with conventional printed-circuit-board technology. This work has a wide range of potential applications [41][42][43], particularly for some antennas that operate in harsh conditions, such as climate monitoring and maritime communications. The proposed technique offers a new research area on the combination of ultrafast laser technology with unique electromagnetic device realization.…”

Section: Discussionmentioning

confidence: 99%

Commercial-printed-circuitry-compatible Self-superhydrophobic Antennas Based on Laser Direct Writing

Ge¹,

Yang²,

Ren³

et al. 2023

PIER

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Antennas are essential devices to build everything connected in the era of information. However, the quality of communications would be degraded with the presence of raindrops on the antenna surface. Additional antiwater radomes may generate radiation loss and dispersive impedance mismatch over a broad frequency range, which is not acceptable for next-generation communication systems integrating multiple bands. Here, we report the first experimental demonstration of selfhydrophobic antennas that cover the bands of 1.7 GHz, 3.5 GHz, and 8.5 GHz through a laser-directwriting treatment. Experimental results show that the return loss, radiation pattern, and efficiency of self-superhydrophobic antennas can be maintained in the mimicked rainy weather. Furthermore, writing hydrophobic nanostructures on both dielectrics and metals is compatible with commercial printed circuitry techniques widely used in industries. Our technique will augment the laser fabrication technology for specialized electromagnetic devices and serve as a powerful and generalized solution for all-weather wireless communication systems.

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Section: Discussionmentioning

confidence: 99%

Commercial-printed-circuitry-compatible Self-superhydrophobic Antennas Based on Laser Direct Writing

Ge¹,

Yang²,

Ren³

et al. 2023

PIER

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Angular momentum modulation of vortex Cherenkov radiation in optical waveguides

Wang,

Li,

et al. 2024

Opt. Express

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Vortex free-electron radiation has attracted considerable interest because of its promising potential for applications in communication, high-density radiation sources, and particle detection. Here, we reveal angular momentum modulation of vortex Cherenkov radiation using subwavelength silicon waveguides. The topological charge of vortex radiation field can be controlled by the position parameters of two electron beams based on the rotational symmetry. Besides, the spin angular momentum is accompanied by the excited orbital angular momentum due to the spin-orbit interaction of light. In particular, the periodic evolution of spin and orbital angular momenta are demonstrated by breaking the symmetry of the waveguide. Our results provide a novel mechanism for flexibly regulating vortex electron radiation and exploring electro-optical interaction.

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Polarized vortex Smith–Purcell radiation with cascaded metasurfaces

Xu,

Li,

Wang

et al. 2024

Opt. Lett.

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We introduce the concept of polarized vortex Smith–Purcell radiation by the interaction of an electron beam and cascaded metasurfaces. The spin and orbital angular momenta of Smith–Purcell radiation are determined by the cascaded metasurface that consists of a grating and a phase gradient metasurface. The grating converts the electron beam radiation into the desired polarized light, while the phase gradient metasurface generates the vortex light. Furthermore, the vortex Smith–Purcell radiation with linear and circular polarizations can be achieved by the various cascaded metasurfaces. In particular, the conversion of chirality in the Smith–Purcell radiation carrying circular polarization is accompanied by the alteration of positive and negative topological charges. This work paves the way for generating polarized vortex electron radiation and is beneficial to promote the development of free-electron-driven devices.

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Direction-dependent polarization modulation of Cherenkov diffraction radiation based on metasurfaces

Cited by 3 publications

References 41 publications

Commercial-printed-circuitry-compatible Self-superhydrophobic Antennas Based on Laser Direct Writing

Commercial-printed-circuitry-compatible Self-superhydrophobic Antennas Based on Laser Direct Writing

Angular momentum modulation of vortex Cherenkov radiation in optical waveguides

Polarized vortex Smith–Purcell radiation with cascaded metasurfaces

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