Liangsheng Li

Sun Yat-sen University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Hongcheng Yin

Communication University of China

Yongqiang Liu

Tongji University

Qingfan Shi

Beijing Institute of Technology

Ning Zheng

Beijing Institute of Technology

Wen‐Long You

Nanjing University of Aeronautics and Astronautics

Jinhai Sun

Shanghai Jiao Tong University

Maoxin Liu

Beijing Normal University

Kainan Qi

China Aerospace Science and Technology Corporation

Wang Sun

Communication University of China

Pingping Wen

Delft University of Technology

Cooperative Institutions

Chinese Academy of Sciences

Defence Electronics Research Laboratory

Beijing Institute of Technology

University of Chinese Academy of Sciences

Tsinghua University

Central South University

Zhejiang University

Jilin University

Nanjing University of Aeronautics and Astronautics

Chongqing University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Optical forces in photonic Weyl system

New Journal of Physics (2022)

Yang Yang Hsun‐Chi Chan Ke Bi Gaoyan Duan Maoxin Liu

Abstract Topological photonics has attracted extensive attention, since it allows for a platform to explore and exploit versatile nano-optics systems. In particular, the ideal Weyl metamaterials have recently been demonstrated with fascinating phenomena such as chiral zero mode and negative refraction. In this work, we apply the photonic Weyl metamateirals into the optical tweezers. Based on the effective medium approach, the optical force generated by the body state of the Weyl metamaterial is systematically investigated. Interestingly, theoretical results show that for oblique incidence, the optical force spectra present a valley around Weyl frequency with zero magnitude exactly at the Weyl frequency, and the forces show strong optical circular dichroism. In addition, due to the bi-anisotropic properties, transmissions through the Weyl metamaterial exhibit a significant linear-to-circular polarization conversion and the transmitted wavefront acquires spin momenta of photons, which induces abnormal force on chiral particles. Our study may provide potential applications in the optical manipulations, polarization conversions, and wavefront engineering optics.

10.1088/1367-2630/ac5e88

Cite

Citations (9)

Machine-learning-inspired quantum control in many-body dynamics

Physical review. A/Physical review, A (2024)

M. X. Mao Zheng Cheng Liangsheng Li Ning Wu Wen‐Long You

Achieving precise preparation of quantum many-body states is crucial for the practical implementation of quantum computation and quantum simulation. However, the inherent challenges posed by unavoidable excitations at critical points during quench processes necessitate careful design of control fields. In this work, we introduce a promising and versatile dynamic control neural network tailored to optimize control fields. We address the problem of suppressing defect density and enhancing cat-state fidelity during the passage across the critical point in the quantum Ising model. Our method facilitates seamless transitions between different objective functions by adjusting the optimization strategy. In comparison to gradient-based power-law quench methods, our approach demonstrates significant advantages for both small system sizes and long-term evolutions. We provide a detailed analysis of the specific forms of control fields and summarize common features for experimental implementation. Furthermore, numerical simulations demonstrate the robustness of our proposal against random noise and spin number fluctuations. The optimized defect density and cat-state fidelity exhibit a transition at a critical ratio of the quench duration to the system size, coinciding with the quantum speed limit for quantum evolution.

Dynamics

10.1103/physreva.109.042428

Cite

Citations (2)

Three-dimensional imaging through random media using terahertz waves

Quanchun Yu He Cai Hongcheng Yin Liangsheng Li

Terahertz gap

10.1109/icoim60566.2023.10491554

Cite

Citations (0)

A Single-Beam Scanning Leaky-Wave Antenna with Wide-Angle Scanning Capability

2022 International Conference on Microwave and Millimeter Wave Technology (ICMMT) (2024)

Liangsheng Li Yuanxin Li Yong Wu Yixin Yao Xianhao Pang

Leaky wave antenna

Beam steering

10.1109/icmmt61774.2024.10672439

Cite

Citations (0)

Simulation and Measurement of Dielectric Constants of Crystal Alumina and Powder Alumina in Terahertz Waveband

Wang Sun He Cai Liangsheng Li Hongcheng Yin

Based on the first principles, the vibration properties of alpha alumina are calculated, and the transverse and longitudinal phonon vibration frequencies and high-frequency dielectric constants are obtained. Based on the dielectric constant theoretical model and the infinite plate reflectivity model, the reflectivity of 300K and 900K are obtained. The reflectivity of crystalline aluminum oxide and aluminum oxide powder tablets with two particle sizes were measured by Fourier time-domain spectral reflectance measurement device. The theoretical results are in good agreement with the experimental results, which shows that the calculation based on the first principle can accurately predict the spectral characteristics of materials, and can provide accurate prediction data for material spectral identification.

Crystal (programming language)

Aluminum Oxide

10.1109/csrswtc56224.2022.10098387

Cite

Citations (1)

Broadband, large-numerical-aperture and high-efficiency microwave metalens by using a double-layer transmissive metasurface

Applied Physics Express (2021)

Yongqiang Liu Zhongru Ren Yingchao Shu Lujun Wu Jinhai Sun

Abstract Broadband metalenses consisting of sub-wavelength phase gradient elements are indispensable in modern science and technology. So far, several broadband optical metalenses are demonstrated but mostly with either small NA or relatively low focusing efficiency. Herein, an ultra-thin broadband microwave metalens (frequency range from 8.0 to 10.5 GHz) with a relatively high-efficiency above 40% and a large NA of more than 0.6 is presented. The metalens is also fabricated and the measurement results agree with the simulations very well. The performances of the presented broadband metalens can surpass nowadays microwave metalenses largely and open up new vistas for low-profile, low-cost and light-weight microwave components.

Aperture (computer memory)

10.35848/1882-0786/ac4534

Cite

Citations (25)

Renormalization: Single-photon processes of two-level system in free space

Journal of Systems Engineering and Electronics (2020)

Chong Wang Zhu Yong Liangsheng Li Hongcheng Yin

The investigation on quantum radar requires accurate computation of the state vectors of the single-photon processes of the two-level system in free space. However, the traditional Weisskopf-Wigner (W-W) theory fails to deal with those processes other than spontaneous emission. To solve this problem, we provide a new method based on the renormalization theory. We evaluate the renormalized time-ordered Green functions associated with the single-photon processes, and relate them to the corresponding state vectors. It is found that the ultraviolet divergences generated by the Lamb shift and higher-order interactions can be systematically subtracted in the state vectors. The discussions on spontaneous emission and single-photon absorption are then presented to illustrate the proposed method. For spontaneous emission, we obtain the same results of the W-W theory. For single-photon absorption where W-W theory fails, we find that the two-level electric dipole first gets excited rapidly and then decays exponentially, and that the efficiency of the single-photon absorption declines as the bandwidth of the incident photon becomes narrow. The proposed method can improve the investigation on quantum radar.

Lamb shift

10.23919/jsee.2020.000069

Cite

Citations (0)

High numerical aperture and large focusing efficiency metalens based on multilayer transmitarray elements

Optics and Lasers in Engineering (2021)

Yongqiang Liu Jinhai Sun Yingchao Shu Lujun Wu Lan Lu

Numerical aperture

Aperture (computer memory)

Directivity

10.1016/j.optlaseng.2021.106734

Cite

Citations (39)

Scaling probability distribution of granular chains in two dimensions

RePEc: Research Papers in Economics (2014)

Guan Wang Ning Zheng Pingping Wen Liangsheng Li Qingfan Shi

Source

Cite

Citations (0)

High-Efficient and Polarization-Insensitive Metalens Using Sub-Wavelength Circular Slot Elements

2022 20th International Conference on Optical Communications and Networks (ICOCN) (2022)

Yongqiang Liu Zhongru Ren Jinhai Sun Liangsheng Li Hongcheng Yin

Metallic metasurfaces sandwiched by several dielectric (or air) mediums provide new routes to develop high-performance metalenses in low spectrums. However, the polarization-dependent unit cell design is one of the main challenges toward multi-polarization plasmonic metalenses especially for high transmission efficiency arrays design. In this paper, to overcome this obstacle, an annular slot element-type metallic metasurface is proposed for the design of high efficient metalens in the microwave band. The meta-atom with different layer metal-dielectric-metal hybrid structure is investigated and compared with each other by using full-wave simulations. Besides, transverse magnetic (TM) and transverse electric (TE) mode of unit cell are specifically presented for transmission magnitude, phase distribution and power intensity. In order to fulfill the required phase profile to create metalens simultaneously with high transmission efficiency, four-layer sub-wavelength metallic metasurface with varying outer radius of slot-element is selected. An ultra-thin microwave metalens operating around 9GHz is thus designed and its focusing performances such as focusing power intensity, full-width at half-maximum of its focusing spot and focusing efficiency are also analyzed with full-simulation microwave studio. The studies here on microwave metalens based on proposed meta-atom provide new ways to develop polarization-insensitive high transmission meta-devices in low spectrum.

10.1109/icocn55511.2022.9901262

Cite

Citations (0)