An aluminum(Al)based nearly guided-wave surface plasmon resonance(NGWSPR)sensor is investigated in the far-ultraviolet(FUV)region.By simultaneously optimizing the thickness of Al and dielectric films,the sensitivity o...An aluminum(Al)based nearly guided-wave surface plasmon resonance(NGWSPR)sensor is investigated in the far-ultraviolet(FUV)region.By simultaneously optimizing the thickness of Al and dielectric films,the sensitivity of the optimized Al-based FUV-NGWSPR sensor increases from 183/RIU to 309/RIU,and its figure of merit rises from 26.47 RIU^(-1)to 32.59 RIU^(-1)when the refractive index of dielectric increases from 2 to 5.Compared with a traditional FUV-SPR sensor without dielectric,the optimized FUV-NGWSPR sensor can realize simultaneous improvement of sensitivity and figure of merit.In addition,the FUV-NGWSPR sensor with realistic materials(diamond,Ta_(2)O_(5),and GaN)is also investigated,and 137.84%,52.70%,and 41.89%sensitivity improvements are achieved respectively.This work proposes a method for performance improvement of FUV-SPR sensors by exciting nearly guided-wave,and could be helpful for the high-performance SPR sensor in the short-wavelength region.展开更多
The growing complexity of artificial intelligence-driven devices requires multifunctional materials that exhibit nonlinear responses to address key challenges in adaptive signal processing and energy-efficient computi...The growing complexity of artificial intelligence-driven devices requires multifunctional materials that exhibit nonlinear responses to address key challenges in adaptive signal processing and energy-efficient computing.To meet these demands,hexagonal Bi_(2)Se_(3) ceramics are synthesized with controlled thicknesses via a chemical reduction synthesis method.The aggregated Bi_(2)Se_(3) nanosheets exhibit remarkable capacitance tunability under an applied bias voltage.Moreover,a significant increase in the electromagnetic interference(EMI)shielding performance was achieved at a bias voltage,which was attributed primarily to improved electrical conductivity.At a bias voltage of 15 V and an optical power density of 200 mW/cm^(2),the average total EMI shielding effectiveness(SE_(T))of Bi_(2)Se_(3) nanosheets increases to 62.8 from 23.9 dB.The collaborative combination of multiple superior functionalities within a single material platform with tunable capacitance,dynamically tunable EMI shielding,and excellent light response endows Bi_(2)Se_(3) nanosheets with great potential for applications in intelligent storage,microelectronics,and low-light photodetectors.展开更多
Magnetoelectric composites can achieve magneto-electric synergy to optimize impedance matching.However,it is challenging to enhance the broadband absorption performance for thin thickness absorbers.Herein,FeNi_(3)@C c...Magnetoelectric composites can achieve magneto-electric synergy to optimize impedance matching.However,it is challenging to enhance the broadband absorption performance for thin thickness absorbers.Herein,FeNi_(3)@C composite with magnetic alloy core and N-doped macroporous multilevel layered carbon shell was constructed by hierarchical interface engineering.The uniform multilevel layered carbon shell could induce interfacial polarization and multiple scattering,and further endows enhanced electromagnetic attenuation and optimized impedance matching.An ultra-thin broadband absorber with an effective absorption bandwidth of 7.4 GHz is achieved at a thickness of only 1.6 mm.Moreover,full-band absorption from 2 to 18 GHz at a thickness of 9.8 mm is realized through metastructure design.This work provides an alternative strategy to prepare coreshell structured magnetoelectric composites for ultra-thin and broadband absorbers.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.61805007 and 11547241)
文摘An aluminum(Al)based nearly guided-wave surface plasmon resonance(NGWSPR)sensor is investigated in the far-ultraviolet(FUV)region.By simultaneously optimizing the thickness of Al and dielectric films,the sensitivity of the optimized Al-based FUV-NGWSPR sensor increases from 183/RIU to 309/RIU,and its figure of merit rises from 26.47 RIU^(-1)to 32.59 RIU^(-1)when the refractive index of dielectric increases from 2 to 5.Compared with a traditional FUV-SPR sensor without dielectric,the optimized FUV-NGWSPR sensor can realize simultaneous improvement of sensitivity and figure of merit.In addition,the FUV-NGWSPR sensor with realistic materials(diamond,Ta_(2)O_(5),and GaN)is also investigated,and 137.84%,52.70%,and 41.89%sensitivity improvements are achieved respectively.This work proposes a method for performance improvement of FUV-SPR sensors by exciting nearly guided-wave,and could be helpful for the high-performance SPR sensor in the short-wavelength region.
基金supported by the National Natural Science Foundation of China(Nos.62175010 and 52273260)the Fundamental Research Funds of Shaanxi Key Laboratory of Artificially-Structured Functional Materials and Devices(No.AFMD-KFJJ-24201).
文摘The growing complexity of artificial intelligence-driven devices requires multifunctional materials that exhibit nonlinear responses to address key challenges in adaptive signal processing and energy-efficient computing.To meet these demands,hexagonal Bi_(2)Se_(3) ceramics are synthesized with controlled thicknesses via a chemical reduction synthesis method.The aggregated Bi_(2)Se_(3) nanosheets exhibit remarkable capacitance tunability under an applied bias voltage.Moreover,a significant increase in the electromagnetic interference(EMI)shielding performance was achieved at a bias voltage,which was attributed primarily to improved electrical conductivity.At a bias voltage of 15 V and an optical power density of 200 mW/cm^(2),the average total EMI shielding effectiveness(SE_(T))of Bi_(2)Se_(3) nanosheets increases to 62.8 from 23.9 dB.The collaborative combination of multiple superior functionalities within a single material platform with tunable capacitance,dynamically tunable EMI shielding,and excellent light response endows Bi_(2)Se_(3) nanosheets with great potential for applications in intelligent storage,microelectronics,and low-light photodetectors.
基金This work was supported by the National Natural Science Foundation of China(Nos.52273260 and 62175010)the National Key Laboratory of Electromagnetic Information Control and Effects Open Fund(No.SYS1W2023010303).
文摘Magnetoelectric composites can achieve magneto-electric synergy to optimize impedance matching.However,it is challenging to enhance the broadband absorption performance for thin thickness absorbers.Herein,FeNi_(3)@C composite with magnetic alloy core and N-doped macroporous multilevel layered carbon shell was constructed by hierarchical interface engineering.The uniform multilevel layered carbon shell could induce interfacial polarization and multiple scattering,and further endows enhanced electromagnetic attenuation and optimized impedance matching.An ultra-thin broadband absorber with an effective absorption bandwidth of 7.4 GHz is achieved at a thickness of only 1.6 mm.Moreover,full-band absorption from 2 to 18 GHz at a thickness of 9.8 mm is realized through metastructure design.This work provides an alternative strategy to prepare coreshell structured magnetoelectric composites for ultra-thin and broadband absorbers.
