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Strongly nonlinear topological phases of cascaded topoelectrical circuits

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Frontiers of physics 2023年第3期18卷 51-58页

作者： Jijie Tang Fangyuan Ma Feng Li honglian guo Di Zhou College of Science Minzu University of ChinaBeijing 100081China Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(MOE)School of PhysicsBeijing Institute of TechnologyBeijing 100081China

Circuits provide ideal platforms of topological phases and matter,yet the study of topological circuits in the strongly nonlinear regime,has been *** propose and experimentally demonstrate strongly nonlinear topological phases and transitions in one-dimensional electrical circuits composed of nonlinear *** topological interface modes arise on domain walls of the circuit lattices,whose topological phases are controlled by the amplitudes of nonlinear voltage *** measured topological transition amplitudes are in good agreement with those derived from nonlinear topological band *** prototype paves the way towards flexible metamaterials with amplitude-controlled rich topological phases and is readily extendable to two and three-dimensional systems that allow novel applications.

关键词： strongly nonlinear Berry phase topological electrical

Financial Coordination and Income Distribution of Agricultural Supply Chain

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Proceedings of Business and Economic Studies 2021年第3期4卷 6-13页

作者： Leilei Zhang honglian guo Beijing Wuzi University Beijing 101149China

The agriculture field is a fundamental industry which supports the rapid development of the nation?s ***,credit constraints faced by farmers have restricted the modernization in the agricultural *** agricultural supply chain finance is effective in promoting rural industrial revitalization and agricultural modernization,which is of great significance to the transformation and development of rural economy and agriculture in *** this paper,the financial coordination model in agricultural supply chain is constructed,and the income distribution model of Shapley value method is *** results showed that the agricultural supply chain finance can significantly improve the income of the participants in the agricultural industrial chain and verify the economic feasibility of agricultural supply chain finance.

关键词： Agriculture Supply chain finance Income distribution

Coordination Model of Consumer Information Sharing in the Online Tourism Supply Chain

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Proceedings of Business and Economic Studies 2021年第6期4卷 1-9页

作者： honglian guo Xuexue Zhang Beijing Wuzi University Beijing 101149China

This is a study of the coordination model of consumer information sharing in the tourism supply chain with e-commerce platforms as the *** the basis of considering the risks,a game theory is used to explore the information sharing effort level and the output profit of the tourism supply chain under both,centralized decision-making and decentralized ***,numerical simulation is used to verify the model and put forward a method of coordination for all parties in the tourism supply chain to achieve maximum profit.

关键词： Tourism supply chain Information sharing Coordination

Light-induced tumor theranostics based on chemical-exfoliated borophene

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Light(Science & Applications) 2022年第12期11卷 2886-2899页

作者： Zhongjian Xie Yanhong Duo Taojian Fan Yao Zhu Shuai Feng Chuanbo Li honglian guo Yanqi Ge Shakeel Ahmed Weichun Huang Huiling Liu Ling Qi Rui guo Defa Li Paras N.Prasad Han Zhang Institute of Pediatrics Shenzhen Children’s HospitalShenzhenGuangdongChina Shenzhen Engineering Laboratory of phosphorene and Optoelectronics International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationShenzhen Institute of Translational MedicineDepartment of OtolaryngologyShenzhen Second People’s Hospitalthe First Affiliated HospitalInstitute of Microscale OptoelectronicsShenzhen University518060 ShenzhenChina Department of Microbiology Tumor and Cell Biology(MTC)Karolinska InstituteStockholmSweden Shenzhen Medical Ultrasound Engineering Center Department of UltrasonographyShenzhen People’s HospitalSecond Clinical Medical College of Jinan UniversityFirst Clinical Medical College of Southern University of Science and Technology518020 ShenzhenChina Optoelectronics Research Center School of ScienceMinzu University of China100081 BeijingPR China Nantong Key Lab of Intelligent and New Energy Materials College of Chemistry and Chemical EngineeringNantong University226019 NantongJiangsuChina Key Laboratory of Biomaterials of Guangdong Higher Education Institutes Guangdong Provincial Engineering and Technological Research Centre for Drug Carrier DevelopmentDepartment of Biomedical EngineeringJinan University510632 GuangzhouChina Department of Core Medical Laboratory the Sixth Affiliated Hospital of Guangzhou Medical UniversityQingyuan People’s HospitalQingyuanGuang Dong ProvinceChina Department of Laboratory Medicine Shenzhen Children’s HospitalShenzhenGuangdongChina Institute for Lasers Photonicsand Biophotonics and Department of ChemistryUniversity at BuffaloState University of New YorkBuffaloNYUSA

Among 2D materials(Xenes)which are at the forefront of research activities,borophene,is an exciting new entry due to its uniquely varied optical,electronic,and chemical properties in many polymorphic forms with widely varying band gaps including the lightest 2D metallic *** this paper,we used a simple selective chemical etching to prepare borophene with a strong near IR light-induced photothermal *** photothermal efficiency is similar to plasmonic Au nanoparticles,with the added benefit of borophene being degradable due to electron deficiency of *** introduce this selective chemical etching process to obtain ultrathin and large borophene nanosheets(thickness of ~4 nm and lateral size up to ~600 nm)from the precursor of AlB_(2).We also report first-time observation of a selective Acid etching behavior showing HCl etching of Al to form a residual B lattice,while HF selectively etches B to yield an Al *** demonstrate that through surface modification with polydopamine(PDA),a biocompatible smart delivery nanoplatform of B@PDA can respond to a tumor environment,exhibiting an enhanced cellular uptake *** demonstrate that borophene can be more suitable for safe photothermal theranostic of thick tumor using deep penetrating near IR light compared to gold nanoparticles which are not degradable,thus posing longterm toxicity *** about 40 kinds of borides,we hope that our work will open door to more discoveries of this top-down selective etching approach for generating borophene structures with rich unexplored thermal,electronic,and optical properties for many other technological applications.

关键词： chemical uniquely electronic

Microscopic and macroscopic manipulation of gold nanorod and its hybrid nanostructures[Invited]

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Photonics Research 2013年第1期1卷 28-41页

作者： Jiafang Li honglian guo Zhi-Yuan Li Laboratory of Optical Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

Gold nanorods(GNRs)have potential applications ranging from biomedical sciences and emerging nanophoton*** this paper,we will review some of our recent studies on both microscopic and macroscopic manipulation of *** properties of GNR nanoparticles,such as efficient surface plasmon amplifications effects,are in*** stable trapping,transferring,positioning and patterning of GNRs with nonintrusive optical tweezers will be *** beams are further employed to improve the trapping *** the other hand,alignment of GNRs and their hybrid nanostructures will be described by using a film stretch method,which induces the anisotropic and enhanced absorptive nonlinearities from aligned *** and engineering of polarized emission from aligned hybrid GNRs will be further demonstrated,with relative excitation–emission efficiency significantly *** works presented in this review show that optical tweezers possess great potential in microscopic manipulation of metal nanoparticles and macroscopic alignment of anisotropic nanoparticles could help the macroscopic samples to flexibly represent the plasmonic properties of single nanoparticles for fast,cheap,and high-yield applications.

关键词： nanoparticles macroscopic trapping

Design of Principal-agent Incentive Mechanism between Government and NPO

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Proceedings of Business and Economic Studies 2021年第1期4卷 41-45页

作者： honglian guo Zhenzhen Wu Han Li Beijing Wuzi University Beijing 101149China

Based on principal-agent theory,this paper establishes an incentive contract mechanism between government and NPO under asymmetric information,and analyzes the impact of absolute risk aversion and output level on the expected utility of government,NPO and *** shows that risk aversion is negatively correlated with the expected utility of government,NPO and *** output coefficient is positively correlated with the expected utility of government,NPO and *** absolute risk aversion,increasing output coefficient and increasing government incentives can effectively motivate NPO to actively participate in social rescue activities.

关键词： Principal-agent Incentive intensity Level of output Expected utility

Ray-optics model for optical force and torque on a spherical metal-coated Janus microparticle

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Photonics Research 2015年第5期3卷 265-274页

作者： Jing Liu Chao Zhang Yiwu Zong honglian guo Zhi-Yuan Li Key Laboratory of Optical Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Key Laboratory of Soft Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

In this paper, we develop a theoretical method based on ray optics to calculate the optical force and torque on a metallo-dielectric Janus particle in an optical trap made from a tightly focused Gaussian beam. The Janus particle is a 2.8 μm diameter polystyrene sphere half-coated with gold thin film several nanometers in thickness. The calculation result shows that the focused beam will push the Janus particle away from the center of the trap,and the equilibrium position of the Janus particle, where the optical force and torque are both zero, is located in a circular orbit surrounding the laser beam axis. The theoretical results are in good agreement qualitatively and quantitatively with our experimental observation. As the ray-optics model is simple in principle, user friendly in formalism, and cost effective in terms of computation resources and time compared with other usual rigorous electromagnetics approaches, the developed theoretical method can become an invaluable tool for understanding and designing ways to control the mechanical motion of complicated microscopic particles in various optical tweezers.

关键词： Ray-optics model for optical force and torque on a spherical metal-coated Janus microparticle

Reconfigurable nano-kirigami metasurfaces by pneumatic pressure

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Photonics Research 2020年第7期8卷 1177-1182页

作者： Shanshan Chen Wei Wei Zhiguang Liu Xing Liu Shuai Feng honglian guo Jiafang Li Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(Ministry of Education) Beijing Key Laboratory of Nanophotonics&Ultrafine Optoelectronic Systemsand School of PhysicsBeijing Institute of TechnologyBeijing 100081China School of Science Minzu University of ChinaBeijing 100081China Institute of Physics Chinese Academy of SciencesBeijing 100190China

Tunable/reconfigurable metasurfaces that can actively control electromagnetic waves upon external stimuli are of great importance for practical applications of ***,we demonstrate a reconfigurable nano-kirigami metasurface driven by pneumatic pressure operating in the near-infrared wavelength *** metasurfaces consist of combined Archimedean spirals and are fabricated in a free-standing gold/silicon nitride nanofilm by employing focused ion beam(FIB)*** deformable spirals are instantly transformed from two dimensional(2 D)to three-dimensional(3 D)by the FIB-based nano-kirigami *** 2 D–to–3 D transformation induces a dramatic irreversible change of the plasmonic quadruple modes and results in significant modulation in reflection by 137%.The suspended porous nano-kirigami metasurface is further integrated with an optofluidics device,with which the optical resonance is reversibly modulated by the pneumatic *** work provides a strategy for tunable/reconfigurable metasurfaces,which are useful to build a promising lab-ona-chip platform for microfluidics,biological diagnostics,chemical sensing,and pressure monitoring.

关键词： process. irreversible porous

Refractive index sensing based on a twisted nano-kirigami metasurface

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Photonics Research 2024年第2期12卷 218-225页

作者： SHUQI QIAO XIAOCHEN ZHANG QINGHUA LIANG YANG WANG CHANG-YIN JI XIAOWEI LI LAN JIANG SHUAI FENG honglian guo JIAFANG LI School of Science Minzu University of ChinaBeijing 100081China Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(Ministry of Education) Beijing Key Laboratory of Nanophotonics&Ultrafine Optoelectronic Systemsand School of PhysicsBeijing Institute of TechnologyBeijing 100081China Laser Micro/Nano Fabrication Laboratory School of Mechanical EngineeringBeijing Institute of TechnologyBeijing 100081China

Plasmonic sensing technology has attracted considerable attention for high sensitivity due to the ability to effectively localize and manipulate *** this study,we demonstrate a refractive index(RI)sensing scheme based on open-loop twisted meta-molecule arrays using the versatile nano-kirigami *** sensing has the features of a small footprint,flexible control,and simple *** engineering the morphology of meta-molecules or the RI of the ambient medium,the chiral surface lattice resonances can be significantly enhanced,and the wavelength,intensity,and sign of circular dichroism(CD)can be flexibly *** the relation between the wavelength of the CD peak and the RI of the superstrate,the RI sensor achieves a sensitivity of 1133 nm/***,we analyze these chiroptical responses by performing electromagnetic multipolar decomposition and electric field *** study may serve as an ideal platform for applications of RI measurement and provide new insights into the manipulation of chiral light–matter interactions.

关键词： twisted chiral index