In the face of the increasingly serious electromagnetic wave (EMW) pollution, a component modulation strategy is proposed in this study. By integrating ZIF-67 and FeOOH into MXene nanosheets and performing heat treatm...In the face of the increasingly serious electromagnetic wave (EMW) pollution, a component modulation strategy is proposed in this study. By integrating ZIF-67 and FeOOH into MXene nanosheets and performing heat treatment, a multiphase heterogeneous structure based on the multicomponent synergistic effect was successfully constructed. The synergistic effect of dielectric loss and magnetic loss is realized, and the rich heterogeneous interface and multi-scale structure significantly enhance the interface polarization and multiple scattering. The results show that the EMW absorption performance can be optimized by adjusting the composition of the composites. MXene@CoFe_(2)O_(4) exhibits a minimum reflection loss (RLmin) of -44.98 dB at 2.3 mm thickness and a maximum effective absorption bandwidth (EAB_(max)) of 4.64 GHz at 2.1 mm. MXene@CoFe_(2)O_(4)/CoFe composite has an RLmin of -55.14 dB at a thickness of 2.1 mm and an EAB_(max) of 5.60 GHz at a thickness of 1.9 mm. This work provides important insights into the development of wideband EMW absorbent materials.展开更多
Effective application of digital integrated management and maintenance systems is essential for successful operation and maintenance management of bridge projects.This article analyzes the application strategy of such...Effective application of digital integrated management and maintenance systems is essential for successful operation and maintenance management of bridge projects.This article analyzes the application strategy of such systems.It provides an overview of comprehensive digital management and maintenance of bridges,an analysis of the basic components of the integrated management and maintenance system,and its application strategies.This study aims to offer guidance for the application of the system and to improve the quality of modern bridge engineering management and maintenance work.展开更多
Vortex fiber lasers that directly deliver low-cost and high-performance vortex beams could provide straightfor-ward and compact solutions for structured laser sources and have found applications in various fields.Suff...Vortex fiber lasers that directly deliver low-cost and high-performance vortex beams could provide straightfor-ward and compact solutions for structured laser sources and have found applications in various fields.Suffering from either simple and fixed functionality,or large insertion loss together with bulky configurations of phase modulation components such as q-plates and spatial light modulators,the output flexibility and tunability of conventional vortex fiber lasers are limited.Recently,polarization-multiplexing metasurfaces(PMMs)have shown powerful potential for manipulating light in different dimensions.Here we propose and experimentally demonstrate topological charge switchable vortex fiber lasers assisted by on-demand customized PMMs.Importantly,by adjusting the setting of the wave plates within the cavity,the topological charge of the output vortex beams can be effectively switched and even decoupled at will.The design principle and experimental verification offer new perspectives for vortex fiber laser configurations,offering promising applications from large-capacity optical communication and particle manipulation to super-resolution microscopy and quantum information processing.展开更多
基金supported by the National Nat-ural Science Foundation of China(No.52377026)the Tais-han Scholars Program(No.tsqn202103057)+6 种基金the Natural Sci-ence Foundation of Shandong Province(No.ZR2024ME046)the Postdoctoral Fellowship Program of CPSF(No.GZB20240327)the Shandong Postdoctoral Science Foundation(No.SDCX-ZG-202400275)the Qingdao Postdoctoral Application Research Project(No.QDBSH20240102023)the Postdoctoral Science Foundation of China(No.2024M751563)the Key Innovative Research Team of New Energy Materials and Devices(No.BBXYKYTDxjZD01)the University Natural Science Research Project of Anhui Province(No.2022AH010101).
文摘In the face of the increasingly serious electromagnetic wave (EMW) pollution, a component modulation strategy is proposed in this study. By integrating ZIF-67 and FeOOH into MXene nanosheets and performing heat treatment, a multiphase heterogeneous structure based on the multicomponent synergistic effect was successfully constructed. The synergistic effect of dielectric loss and magnetic loss is realized, and the rich heterogeneous interface and multi-scale structure significantly enhance the interface polarization and multiple scattering. The results show that the EMW absorption performance can be optimized by adjusting the composition of the composites. MXene@CoFe_(2)O_(4) exhibits a minimum reflection loss (RLmin) of -44.98 dB at 2.3 mm thickness and a maximum effective absorption bandwidth (EAB_(max)) of 4.64 GHz at 2.1 mm. MXene@CoFe_(2)O_(4)/CoFe composite has an RLmin of -55.14 dB at a thickness of 2.1 mm and an EAB_(max) of 5.60 GHz at a thickness of 1.9 mm. This work provides important insights into the development of wideband EMW absorbent materials.
文摘Effective application of digital integrated management and maintenance systems is essential for successful operation and maintenance management of bridge projects.This article analyzes the application strategy of such systems.It provides an overview of comprehensive digital management and maintenance of bridges,an analysis of the basic components of the integrated management and maintenance system,and its application strategies.This study aims to offer guidance for the application of the system and to improve the quality of modern bridge engineering management and maintenance work.
基金National Natural Science Foundation of China(61905018)Fundamental Research Funds for the Central Universities(ZDYY202102)State Key Laboratory of InformationPhotonics and Optical Communications(IPOC2021ZR02).
文摘Vortex fiber lasers that directly deliver low-cost and high-performance vortex beams could provide straightfor-ward and compact solutions for structured laser sources and have found applications in various fields.Suffering from either simple and fixed functionality,or large insertion loss together with bulky configurations of phase modulation components such as q-plates and spatial light modulators,the output flexibility and tunability of conventional vortex fiber lasers are limited.Recently,polarization-multiplexing metasurfaces(PMMs)have shown powerful potential for manipulating light in different dimensions.Here we propose and experimentally demonstrate topological charge switchable vortex fiber lasers assisted by on-demand customized PMMs.Importantly,by adjusting the setting of the wave plates within the cavity,the topological charge of the output vortex beams can be effectively switched and even decoupled at will.The design principle and experimental verification offer new perspectives for vortex fiber laser configurations,offering promising applications from large-capacity optical communication and particle manipulation to super-resolution microscopy and quantum information processing.
