Xin Li

Liaoning University

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Tingyin Ning

Shandong Normal University

Yanyan Huo

Shandong Normal University

Qing-Yang Yue

Shandong Normal University

Jian Jin

Harbin Institute of Technology

Xudi Wang

Hefei University of Technology

Shaojun Fu

University of Science and Technology of China

Fengqin Wu

Air Force Medical University

Hong-Jun Che

Southwest University

Weilun Zhao

Peking University

Lixiang Wu

Sichuan University

Cooperative Institutions

Chinese Academy of Sciences

Hunan University

University of Chinese Academy of Sciences

Peking University

University of Science and Technology of China

Xi'an Jiaotong University

Beijing Institute of Technology

Forschungszentrum Jülich

University of Electronic Science and Technology of China

Yanshan University

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Bistability of optical harmonic generation in monolayer graphene plasmonics

Optics Letters (2021)

Xin Li Yunfeng Tan Luying Yin Yanyan Huo Lina Zhao

We report the bistability of second- and third-harmonic generation in monolayer graphene plasmonics supported by graphene nanoribbon arrays. The nonlinear optical bistability of harmonic generation at the ultra-low threshold intensity ∼ 100 k W / c m 2 , along with the traditional linear optical bistability of transmittance, is observed due to the different local fundamental fields at the lower and higher state when the Kerr effect of graphene is considered. Importantly, the working fundamental wavelength can be tuned by the Fermi level of graphene and geometrical structure, which leads to the linear and nonlinear optical bistability available in a broadband for potential applications in advanced all-optical devices.

Bistability

Optical Bistability

10.1364/ol.416543

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Citations (8)

UV Plasmonic Resonance of Aluminum Shallow Pit Arrays

The Journal of Physical Chemistry C (2015)

Long Cheng Liqing Huang Xin Li Ji Wu Yu Zhang

The UV plasmonic properties of Al shallow pit arrays (ASPA) are investigated by experimental and simulative methods. ASPA with various periods are fabricated by the hard anodization (HA) technique. The measured reflectance spectra of ASPA exhibit a reflectance pit in the UV region, which is red shifted with the increasing period of ASPA and refractive index of the surrounding medium. The dependence of reflectance on the period and refractive index calculated by the finite difference time domain (FDTD) method exhibits the identical evolution trends with measurement results. The angle-dependent reflectance spectrum, spatial electric field, and surface charge distribution calculated by FDTD reveal that ASPA sustains propagating surface plasmons (SPs), the UV reflectance pit corresponds to the propagating SPs mode, and the total field inside the Al shallow pit and its proximity region is enhanced with increasing the period of ASPA, which reveals the origin of the higher sensing performance of ASPA with bigger period and is in accordance with the measured results.

Anodizing

10.1021/acs.jpcc.5b02674

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Citations (17)

Theoretical investigation of a plasmonic sensor based on a metal–insulator–metal waveguide with a side-coupled nanodisk resonator

Journal of Nanophotonics (2015)

Yiyuan Xie Yexiong Huang Hong-Jun Che Weilun Zhao Weihua Xu

A plasmonic sensor based on a metal–insulator–metal waveguide with a side-coupled nanodisk resonator is proposed and numerically investigated using a finite-difference time-domain method. The numerical simulation results indicate that more than one sharp resonance dip appears in the transmission spectrum in the telecommunication regime, and each resonance wavelength has a linear relationship with the refractive index of the dielectric in the resonator. In addition, the sensing characteristics of the structure and the influence of its structural parameters are analyzed in detail by investigating the transmission spectra. As a refractive-index sensor, its sensitivity can reach as high as 1150 nm per refractive index unit near the resonance wavelength of 1550 nm, and its sensing resolution can reach 10−6 for a wavelength resolution of 0.01 nm. Furthermore, by employing the relationship between the temperature and the refractive index, the temperature-sensing characteristics of the structure are also discussed. Near the resonance wavelength of 1550 nm, the temperature sensitivity can reach 0.45 nm/°C. The sensor has a compact and simple structure and may find many potential and important applications in optical networks-on-chip and on-chip nanosensors.

Nanosensor

Waveguide

Metal-insulator-metal

Fano resonance

Coupled mode theory

10.1117/1.jnp.9.093099

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Citations (22)

Polarization-vortex holographic encryption based on photo-oxidation of a plasmonic disk

Optics Letters (2022)

Jingying Miao Shencheng Fu Xin Li Hongfang Liu Xintong Zhang

Holography is a feasible route to realize information encryption, which is crucial for the secure processing of massive data. However, the limited number of application channels in a coherent light field hinders advancement in holographic encryption. Herein, we design a serial coding system based on a plasmonic holographic disk utilizing both spin and orbital angular momenta of photons. Anisotropically photo-oxidized metal nanoparticles accurately distinguish the polarization state and topological charge of the vortex light field in holographic reconstruction. Ultra-stable readout of the encrypted holographic grating array is realized after coating a water-soluble polymer onto a large-area nanoparticle film. This work provides an important research strategy for integrated nanodevices for use in high-density memory, all-optical computing, and cryptographic displays.

Diffraction efficiency

10.1364/ol.465528

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Citations (2)

HID Architecture and Design in Embedded USB Host System

Proceedings of the 2018 International Conference on Network, Communication, Computer Engineering (NCCE 2018) (2018)

Xin Li Junchen You Xinyi Zhou Rentai Chen Ci Tang

Universal Serial Bus (USB) is a personal computer interconnection protocol, developed to make the connection of peripheral devices to a computer easier and more efficient.USB has become the dominant standard for plug-and-play connections between personal computers and peripherals.USB connectivity has moved rapidly into the embedded space.Usually, PCs take the role of USB host in USB system.However, any embedded system has the potential to be an embedded USB host.People can connect human interface devices (HID) or some other USB devices to their embedded products.In this paper we present HID architecture and design in an embedded USB host system.

Host controller interface

10.2991/ncce-18.2018.72

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Lidar-Assisted Visual Localization System Based on Factor Graph Optimization

Xin Li Shaojie Xin

This paper proposes a high-precision localization system for improving the stability and positioning accuracy of robots in dynamic environments. The system is based on graph optimization and integrates data from multiple sensors. By fusing data from laser rangefinders, inertial measurement units, and visual tag measurements through graph optimization, the robot can achieve faster and more accurate localization with higher precision. This method addresses the challenges of failure cases where laser odometry fails to match specific environments and the issue of position drift caused by environmental factors in marker-based localization. Comparative experiments demonstrate the effectiveness of the proposed approach.

Factor graph

Factor (programming language)

10.1109/nnice61279.2024.10498996

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Research on Humanization Design of Coal Mine Machinery

Packaging Engineering (2008)

Xin Li

The theory of humanization design was introduced.The humanization design and development of coal mine machinery were discussed.The research was made in the aspects of human-machine interface,human engineering,and mechanical product esthetics.It was put forward that the design thought of human centered should be fully manifested.Designer should give product humanistic care on the aspects of comfortableness,operating method,physiology,psychology and product semantic of coal mine machinery.It is the development direction of coal mine machinery to become more pleasant and comfortable to use.

Interface (matter)

Source

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How Does Successful Catch-Up Occur In Complex Product and Systems from An Innovation Ecosystem Perspective? The Case of China's High-Speed Railway

SSRN Electronic Journal (2022)

Zhongji Yang QI Liang-qun Jianlong Wu Xin Li

The catch-up of complex product and systems (CoPS) is a great challenge for emerging economies; however, the successful catch-up of CoPS has occurred in recent decades. This paper holds the view that CoPS catch-up means a decreased gap in the innovation ecosystem between latecomers and leaders. The CoPS innovation ecosystem is unpacked, and China's high-speed railway (HSR) is used as a longitudinal case to explore how successful catch-up happens in CoPS. The results show that the CoPS innovation ecosystem presents dynamic evolution in the technology innovation subsystem, value creation subsystem and habitat. Four types of forces from the innovation ecosystem mix together to drive CoPS catch-up, and institutionalization forces from the government have the highest strength but a decreasing trend in the catch-up process. Finally, a CoPS catch-up process model following basic logic of start point, activities and performance is proposed, and CoPS industrial standards are used to measure CoPS catch-up performance. CoPS catch-up from an innovation ecosystem perspective provides new insights for governments and entities in CoPS of emerging economies.

Institutionalisation

10.2139/ssrn.4012880

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Citations (2)

A plasmonic refractive index sensor based on a MIM waveguide with a side-coupled nanodisk resonator

Yexiong Huang Yiyuan Xie Weilun Zhao Hong-Jun Che Weihua Xu

Based on a metal-insulator-metal (MIM) waveguide with a side-coupled nanodisk cavity, the sensor using the surface plasmon polaritons (SPPs) refractive index is investigated and studied numerically. The finite-difference time-domain (FDTD) method is used to simulate the performance of the sensor. The numerical simulation result indicates that all the resonance wavelengths in the transmission characteristic of the structure have a linear relationship with the refractive index of the cavity. Furthermore, the sensitivities of the sensor in this paper for the refractive index can be achieved as high as 1320 nm RIU for the mode1, 812.5 nm RIU for the mode2, 600 nm RIU for the mode3, respectively. Besides, the influences of the structural parameters on the transmission characteristic and the sensing characteristic are also studied in detail by the FDTD method. The sensor with compact and simple structure not only can be used to measure the temperature based on the linear relation between the refractive index and temperature, but also has many potential applications in optical networks on chip and On-chip sensor networks.

Waveguide

10.1109/rtcsa.2014.6910552

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Citations (24)

MACROSCOPIC THEORY OF NONLINEAR OPTICAL ACTIVITY IN A NONCONDUCTIVE ISOTROPIC CHIRAL MEDIUM

Acta Physica Sinica (1999)

Junqing Li Li Chun-Fei Xin Li Shutian Liu T M Il'inova

A nonconductive isotropic chiral medium is described by using classical electromagnetic theroy. The phenomenon of nonlinear optical activity of a linearly polarized aignal light under the action of a circularly polarized pump light is investigated. The expressions of nonlinear optical rotational angle are given. The calculated results using the expressions are in accordance to the experimental results.

Nonlinear medium

10.7498/aps.48.1052

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Citations (1)