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737 results on '"SHI Jinhui"'

1. Dual-band dichroic asymmetric transmission of linearly polarized waves in terahertz chiral metamaterial

Author

Lv Tingting, Chen Xieyu, Dong Guohua, Liu Meng, Liu Dongming, Ouyang Chunmei, Zhu Zheng, Li Yuxiang, Guan Chunying, Han Jiaguang, Zhang Weili, Zhang Shuang, and Shi Jinhui

Subjects
asymmetric transmission, chiral metamaterial, dichroic devices, thz applications, Physics, QC1-999
Abstract

Polarization conversion dichroism is of particular interest in manipulating the polarization state of light, whereas high-performance asymmetric transmission (AT) of linearly polarized waves is still inaccessible in the terahertz range. Here, a bilayer chiral metamaterial consisting of orthogonally chained S-shaped patterns with broken symmetry along the light propagation direction is proposed and demonstrated experimentally to realize a dual-band dichroic AT effect for linearly polarized terahertz waves. The AT effects are robust across a wide range of incident angles. The observed strong AT can be theoretically explained by a multiple reflection and transmission interference model and the transfer matrix method. The proposed bilayer chiral metamaterial may have broad applications in polarization manipulation, chiral biosensing and direction-dependent information processing.

Published
2020
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2. Subharmonic oscillations in the Floquet circuit with the frequency-synthesis dimension

Author

Lv, Bo, Xia, Shiyun, Tian, Ye, Liu, Ting, Mu, Hongyang, Shen, Zhichao, Wang, Sijie, Zhu, Zheng, Tao, Huibin, Meng, Fanyi, and Shi, Jinhui

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Other Condensed Matter
Abstract

The period-doubling oscillation emerges with the coexistence between zero and {\pi} modes in Floquet topological insulator. Here, utilized the flexibility of the circuit, we construct the Floquet circuit with frequency-synthetic dimension and find the topological-protected deeply-subharmonic oscillations with the period extensively exceeding the doubling-driven period. In the construction framework, the periodically-driven mechanism is attained by implementing the circuit-oscillator hierarchy with the stepping-variation resonances in frequency domain. The zero and {\pi} modes that arise at the Floquet band in the circuit indicate the anomalous boundary-bulk correspondence. The coexistence of zero and {\pi} modes, results in a subharmonic oscillation with the extremely-low frequency on the edge of the Floquet circuit. Furthermore, we explore the Floquet band with the enhanced periodically-driven strength tailored by the component flexibility of the circuit. Our method provides a flexible scheme to study Floquet topological phases, and open a new path for realizing the deeply subwavelength system., Comment: 31 pages, 10 figures

Published
2024

3. Modeling and Analysis of Sustainable Photovoltaic-Diesel-Battery Industrial Microgrids

Author

Lin, Xiaoyu, Zheng, Yu, Zheng, Jingdong, Li, Xiangyu, Shi, Jinhui, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Tan, Kay Chen, Series Editor, Liu, Yi, editor, Xu, Zhihong, editor, Tang, Longfei, editor, Song, Kai, editor, and Liu, Yonghui, editor

Published
2025
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7. Improved Hyperspectral Anomaly Detection Algorithm with Double Layer Collaborative Structure

Author

Li Huan, Zhao Jiahao, Liu Guanghan, Shi Jinhui, Song Jiangluqi, Zhou Huixin

Subjects
hyperspectral, anomaly detection, target detection, background pollution, collaborative representation, double layer structure, Motor vehicles. Aeronautics. Astronautics, TL1-4050
Abstract

In the field of hyperspectral target detection, algorithms based on collaborative representation have shown excellent performance. However, the pollution of background dictionaries by anomaly has always been a problem, which affects the detection performance of this algorithm partly. This paper proposes an improved collaborative representation algorithm for hyperspectral anomaly detection, and designs a double-layer collaborative representation structure. Firstly, the first layer collaborative representation algorithm is used to detect most of the anomaly. Its neighborhood pixels are used for background purification to eliminate the pollution of the detected anomaly on the background dictionary. Then, the purified background dictionary is used to predict the background, and in the second layer, the collaborative representation is used for anomaly detection. Simulation experiments show that a simple double layer collaborative representation structure can effectively alleviate the background pollution caused by anomaly. The detection performance of this algorithm is significantly improved compared to the basic collaborative representation algorithm, and it also has relatively good detection performance.

Published
2024
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21. Realization of quasicrystalline quadrupole topological insulators in electrical circuits

Author

Lv, Bo, Chen, Rui, Li, Rujiang, Guan, Chunying, Zhou, Bin, Dong, Guohua, Zhao, Chao, Li, YiCheng, Wang, Ying, Tao, Huibin, Shi, Jinhui, and Xu, Dong-Hui

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Quadrupole topological insulators are a new class of topological insulators with quantized quadrupole moments, which support protected gapless corner states. The experimental demonstrations of quadrupole-topological insulators were reported in a series of artificial materials, such as photonic crystals, acoustic crystals, and electrical circuits. In all these cases, the underlying structures have discrete translational symmetry and thus are periodic. Here we experimentally realize two-dimensional aperiodic-quasicrystalline quadrupole-topological insulators by constructing them in electrical circuits, and observe the spectrally and spatially localized corner modes. In measurement, the modes appear as topological boundary resonances in the corner impedance spectra. Additionally, we demonstrate the robustness of corner modes on the circuit. Our circuit design may be extended to study topological phases in higher-dimensional aperiodic structures.

Published
2021
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38. Ideal type-II Weyl points in topological circuits

Author

Li, Rujiang, Lv, Bo, Tao, Huibin, Shi, Jinhui, Chong, Yidong, Zhang, Baile, and Chen, Hongsheng

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Weyl points (WPs), as nodal degenerate points in three-dimensional (3D) momentum space, are ideal if they are symmetry-related, well-separated, residing at the same energy and far from the nontopological bands. Although type-II WPs show some unique features compared with type-I counterparts, ideal type-II WPs have not yet been reported due to the lack of an ideal Weyl system with enough flexibility to tilt the dispersion bands. By stacking two-dimensional (2D) layers of inductor-capacitor (LC) resonator dimers with the breaking of parity inversion symmetry, here we experimentally realize the topological circuits with only the topological bands and observe a minimal number of four ideal type-II WPs. Two hallmark features of type-II WPs: a strongly tilted band structure with two group velocities having the same sign near type-II WPs and the topological surface states in an incomplete bandgap have been demonstrated. Our results establish an ideal system to the further study of Weyl physics and provide a new perspective to the access of topological matters.

Published
2019
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39. Collective response in planar random-flip coherent metasurface by modulating multipole moments.

Author

Sun, Botian, Zheng, Kaihao, Jiang, Zhaoqi, Li, Wenjia, Lv, Bo, Li, Yuxiang, Zhu, Zheng, Guan, Chunying, and Shi, Jinhui

Subjects
PHYSICS, PERCENTILES
Abstract

We numerically and experimentally investigate collective resonant responses of coherent metasurfaces consisting of planar random-flip asymmetrically split rings. The collective narrow band response becomes broader and eventually disappears with increasing the percentage of flipped split rings. The exploited physical mechanism is the degraded collective response due to random microscopic multipole excitation. Our study provides a method to construct random metasurfaces and is helpful to have an insight into their underlying physics. [ABSTRACT FROM AUTHOR]

Published
2024
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