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Your search keyword '"Xu, Zhuo"' showing total 1,699 results
Start Over Author "Xu, Zhuo" Publication Type Academic Journals
1,699 results on '"Xu, Zhuo"'

9. Generating sub-diffraction microwave needle beam for nondestructive testing by multifunctional transmissive metasurfaces.

Author

Feng, Jialin, Shi, Hongyu, Jiao, Yunhao, Yi, Jianjia, Chen, Juan, Chen, Xiaoming, Zhang, Anxue, and Xu, Zhuo

Subjects
UNIT cell, PLANE wavefronts, RESEARCH personnel, PROOF of concept, MICROWAVES
Abstract

Sub-diffraction needle beams with high intensity, sub-diffraction focal size, and long depth of focus (DOF) have attracted many researchers' attention. However, the traditional methods for needle beam generation typically require many devices, such as phase elements, amplitude filters, and lens, which leads to a complex and bulky system and unfavorable for their integration. To address these challenges, we use a single multifunctional transmissive metasurface to convert a linearly polarized plane wave into a needle beam in the microwave range. The guided wave inspired unit cells of the proposed metasurface is designed to simultaneously and independently modulate the polarization and phase of transmitted waves. By imposing the desired polarization and phase distributions on the metasurface, the proposed multifunctional transmissive metasurface can efficiently generate a needle beam with subdiffraction size and extended DOF at 10 GHz when it is illuminated by an x-polarized wave. The proposed metasurface is fabricated, and a sub-diffraction needle beam with good performance is obtained in our measurements. In addition, a proof-of-concept of a high-resolution nondestructive testing experiment based on our designed metasurface is accomplished. Our work is expected to have potential applications in nondestructive testing of materials and structures. [ABSTRACT FROM AUTHOR]

Published
2024
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10. Hydrothermal synthesis and crystal structure of aqua-tris(4-acetamidobenzoato-κ2 O,O′)-(1,10-phenanthroline-κ2 N,N′)terbium(III) hydrate C39H36N5O11Tb

Author

Xia Yu-Xuan, Xu Zhuo-Wen, Li Wei, and Li Chang-Hong

Subjects
2326332, Physics, QC1-999, Crystallography, QD901-999
Abstract

C39H36N5O11Tb, triclinic, P 1‾ $\overline{1}$ (no. 2), a = 10.3365(12) Å, b = 13.0194(15) Å, c = 15.2064(18) Å, α = 108.769(2)°, β = 94.694(2)°, γ = 100.882(2)°, V = 1880.2(4) Å3, Dc = 1.607 g/cm3, Z = 2, Rgt (F) = 0.0315, wRref (F 2) = 0.0836, T = 296.15 K.

Published
2024
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15. Solvothermal synthesis and crystal structure of aqua-tris(p-acetamidobenzoate-κ2O,O′)-(2,2′-bipyridine-κ2N,N′)terbium(III) - water - methanol (1/1/1)

Author

Xu Zhuo-Wen, Xia Yu-Xuan, Li Chang-Hong, Li Wei, and Liu Yang

Subjects
2268022, Physics, QC1-999, Crystallography, QD901-999
Abstract

C75H76N10O23Tb2, triclinic, P−1‾ $P-\overline{1}$ (no. 2), a = 10.4524(13) Å, b = 12.9626(16) Å, c = 15.2003(18) Å, α = 108.674(2)∘, β = 94.931(2)∘, γ = 101.617(2)∘, V = 1885.8(4) nm3, Z = 1, R gt(F) = 0.0236, wR ref(F 2) = 0.0584, T = 296 K.

Published
2024
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27. Electromechanical properties of BS-PT ceramics under uniaxial pressure and hydrostatic pressure.

Author

Ren, Xiaodan, Jin, Ruoqi, Tang, Mingyang, Hu, Liqing, Liu, Xin, Wang, Yike, Wang, Sanhong, Xu, Zhuo, Geng, Liwei D., and Yan, Yongke

Subjects
PIEZOELECTRIC ceramics, PIEZOELECTRIC materials, HYDROSTATIC pressure, CERAMICS, COERCIVE fields (Electronics)
Abstract

The increasing demands of device applications in harsh environments have led to higher expectations for temperature and pressure resistance in high-temperature piezoelectric materials. In order to understand the performance characteristics of BiScO3-PbTiO3 (BS-PT) high-temperature piezoelectric materials in practical device applications, this study focuses on analyzing the dielectric, piezoelectric, and ferroelectric properties of BS-64PT ceramics under uniaxial stress up to 150 MPa, as well as its electromechanical performance under a hydrostatic pressure of up to 400 MPa. As the uniaxial pressure increases, both the bias-field and large-signal piezoelectric coefficients exhibit a pattern of initially increasing and subsequently decreasing. Furthermore, the bias-field piezoelectric coefficient exceeds 450 pC/N and the large-signal piezoelectric coefficient surpasses 630 pC/N under uniaxial pressures below 100 MPa. This highlights their exceptional resistance to depolarization caused by uniaxial stress. To obtain more precise piezoelectric properties for BS-64PT ceramics in the 31 and 33 modes under hydrostatic pressure, the admittance fitting method was utilized. This method takes into account the significant losses at higher pressures. Within the pressure range of 0–400 MPa, the values of d33 and d31 for BS-64PT ceramics exhibited a minor change of 7.6% and 8%, respectively. These findings indicate that BS-64PT ceramics exhibit more stable piezoelectric properties under both uniaxial and hydrostatic pressures when compared to the majority of Pb-based perovskite-structured materials. The exceptional stability of piezoelectric properties in BS-PT ceramics can be primarily attributed to their elevated anisotropy energy or coercivity field compared to other perovskite-structured Pb(Mg1/3Nb2/3)O3 (PMN) / Pb(Zr,Ti)O3 (PZT)-based ceramics reported. [ABSTRACT FROM AUTHOR]

Published
2024
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47. Cascaded domain engineering optical phased array for 2D beam steering

Author

Li Jingwei, Zheng Huaibin, He Yuchen, Liu Yanyan, Wei Xiaoyong, and Xu Zhuo

Subjects
domain engineering, optical phased array, beam steering, Physics, QC1-999
Abstract

The current approach to 2D optical phased array (OPA) encounters challenges, such as the requirement for a highly tunable laser that is incompatible with certain 2D beam-steering applications or significant power consumption, large antenna spacing and complex wiring resulting from independent control of array elements. To address these challenges, we propose an OPA architecture based on cascaded periodically poled LiNbO3 sequences, a multi-layered domains engineered structure within the LiNbO3 electro-optic crystal, only two control electronics to program the 2D beam-steering trajectory with a range of approximately θ y = ±20° and θ z = ±16° through simulations. This structure enables the uniform distribution of phase differences between adjacent array elements (adjacent domains) upon beam exit from the crystal, ensuring optimal performance. The aim of this study is to develop a methodology that employs domain engineering techniques for designing high-performance phase-controlled devices with customized functional units and sequences in electro-optical crystals. Our research has implications for emerging optoelectronic applications, such as customizable optical interconnects and integrated LiDAR systems.

Published
2023
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