Assembling metal nanoparticles into a well-defined array and constructing strongly coupled hybrid systems enable high-quality resonances with narrow linewidths,which offer new opportunities to circumvent the hurdle of...Assembling metal nanoparticles into a well-defined array and constructing strongly coupled hybrid systems enable high-quality resonances with narrow linewidths,which offer new opportunities to circumvent the hurdle of plasmonic losses.Herein,we propose a light-driven approach for generating plasmonic arrays by leveraging the self-organized patterns of tightly confined surface plasmon polaritons in single metal nanowires,which exhibit optimized unit structures,tunable interparticle spacings with supra-wavelength or sub-wavelength periods beyond the diffraction limit,and flexible alignment directions.We theoretically and experimentally show the mechanism of generating field patterns via the interplay of a standing wave and optical beating,followed by the formation of periodic geometries under a spatially modulated temperature distribution.We also fabricate plasmonic arrays on microfibres with diameters down to~1.4μm and thereby construct a series of hybrid plasmonic-photonic resonators with narrow-band resonances(~3.9 nm linewidth)as well as a barcode system with high multiplexing capacity.Our results show the potential of simple,low-cost,and high-efficiency fabrication of plasmonic arrays and hybrids that may find applications in plasmonic array lasers,information encryption,and high-resolution distributed sensing.展开更多
基金supported by the Chongqing Natural Science Foundation(Grant Nos.CSTB2024NSCQ-MSX1083 and 1076)Fundamental Research Funds for the Central Universities(No.2024CDJXY008)+1 种基金National Foreign Experts Program(No.DL2023165003L)National Natural Science Foundation of China(Nos.62005032 and 62005031).
文摘Assembling metal nanoparticles into a well-defined array and constructing strongly coupled hybrid systems enable high-quality resonances with narrow linewidths,which offer new opportunities to circumvent the hurdle of plasmonic losses.Herein,we propose a light-driven approach for generating plasmonic arrays by leveraging the self-organized patterns of tightly confined surface plasmon polaritons in single metal nanowires,which exhibit optimized unit structures,tunable interparticle spacings with supra-wavelength or sub-wavelength periods beyond the diffraction limit,and flexible alignment directions.We theoretically and experimentally show the mechanism of generating field patterns via the interplay of a standing wave and optical beating,followed by the formation of periodic geometries under a spatially modulated temperature distribution.We also fabricate plasmonic arrays on microfibres with diameters down to~1.4μm and thereby construct a series of hybrid plasmonic-photonic resonators with narrow-band resonances(~3.9 nm linewidth)as well as a barcode system with high multiplexing capacity.Our results show the potential of simple,low-cost,and high-efficiency fabrication of plasmonic arrays and hybrids that may find applications in plasmonic array lasers,information encryption,and high-resolution distributed sensing.
