Metallic @ GST medium heterogeneous nano core-shell structure and preparation method thereof

Abstract

The invention relates to a metallic @ GST medium heterogeneous nano core-shell structure and a preparation method thereof. The core-shell structure core is a metal nanoparticle with the surface plasmon resonance characteristic; and a shell is made of an amorphous phase change material GST. By integrating the dewetting effect of a nano-film under the condition of thermal annealing to a magnetron sputtering coating technology, the heterogeneous core-shell structure preparation the wrapping the metal nanoparticle with the GST is realized; the size of the metal nanoparticle can be adjusted by controlling a thickness of the film; and the GST is further deposited by magnetron sputtering, so that a target element is densely arranged on the metal nano structure based on the relatively strong surface activity performance of the metal nano structure, and the nano core-shell structure with adjustable thickness is obtained. Compared with a single-metal nano-structure, the phase characteristic of the outer-layer GST of the metal @ GST core-shell structure has a tuning effect on the surface plasmon resonance characteristic of the inner-layer metal nanoparticle, and the metallic @ GST medium heterogeneous nano core-shell structure has a wide application prospect in the fields of super-surface devices and the like. The method can realize large-area efficient preparation and is adjustable in property and wide in application range.

Description

technical field [0001] The invention relates to a metal@medium heterogeneous nano-core-shell structure, in particular to a metal@GST medium heterogeneous nano-core-shell structure based on surface activity energy regulation and its preparation method, which belongs to the field of supersurface processing technology. Background technique [0002] The research on metamaterials based on artificially constructed subwavelength-scale nanostructure regulation has become a revolutionary pioneering work in the field of nanophotonics. The two-dimensional form of metamaterials, that is, metasurfaces, has the advantages of low profile, low loss, easy design and implementation compared with three-dimensional metamaterials, and can replace three-dimensional metamaterials in some cases, and has attracted extensive attention from researchers. . The unique design concept based on the control of surface nanostructure units enables it to break through the limitations of the physical structure...

AI Technical Summary

Problems solved by technology

However, at this stage, the combination of GST and metal nanostructures usually uses GST phase change materials as the dielectric substrate and metal nanostructures, which is not a heterogeneous nano-core-shell structure in the true sense, which limits the accuracy of its tuning characteristics.

In addition, due to the small size of metal-dielectric heterogeneous nanostructures and the large material performance differences between heterogeneous materials, it is difficult to process. How to efficiently prepare large-area metal@GST dielectric heterogeneous nano-core-shell structures has become an urgent problem in this field. the puzzle

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