The Study On Coupling Effect Of Plasmonic Cavity And Fluorescence Molecule In Dielectric/Metal-Core/Shell Structure

The metal nanostructures can support surface plasmon resonance to produce many new optical physical effects.With the deepening of theoretical research and modern micro-processing technology,plasmonic photonics were developed Based on the metal micro-nano-structure.It has wide application prospect in many fields such as physics,optics,materials science,biomedicine,information science,condensed matter physics and so on.In this paper,we focus on the plasmon model in Medium/metal-core/shell structure.we mainly introduces the self-supporting technology and the medium/metal-core/shell structure(DMCSRs)prepared by this technology,and the optical properties of this structure.The paper mainly includes the following contents:First,in the introduction,the research background introduced.Including surface plasmon polaritons,local surface plasmon polaritons,plasmon hybridization theory,dielectric/metal core/shell structures,and optical labels.Secondly,the preparation method of the dielectric/metal-core/shell structure is introduced.In short,the floating microsphere hexagonal close-packed array is prepared on the hollow copper mesh by the modified LB method,and then,Evaporation coating method on both side of the particle carried out to prepare a metal film,resulting in a complete dielectric/metal-core/shell structure.This preparation method is simple and efficient,can prepare high-quality metal array structure.And then,we also study the Q-factor of DMCSRs.The plasmonic-photon hybrid model supported by the DMCSRs has a high quality factor,we compared the hybrid model supported by the DMCSRs and the echo wall model supported by the media microspheres,It is found that the Q factor of the two is dependent on the size of their structure.Finally,because the the plasmonic-photon hybrid model supported by DMCSRs has high quality factor,when the dye fluorescence is doped into the medium nucleus,the near Field coupling will occur between fluorescence molecules and the cavity plasmon resonance,which can be used to shape the fluorescence emission spectrum.This narrow linewidth emission feature gives its application prospect in optical marking.At the end of the article,a series of tests were performed on specific properties of the optical marking system.