An Optical Device Based on Surface Plasmon Lattice Resonance

Abstract

An optical device based on surface plasmon lattice resonance includes a substrate dielectric plate and an array of nanostructure units deposited on the substrate dielectric plate, the nanostructure units are sequentially arranged from bottom to top and have the same cross-sectional shape The bottom metal pillars, the middle dielectric pillars and the top metal pillars are closely stacked, the bottom metal pillars and the top metal pillars are made of the same material, and the nanostructure units are evenly distributed on the base dielectric plate in a periodic arrangement superior. The above-mentioned optical device has superior performance in an asymmetric (non-uniform) medium environment, has a simple structure, low manufacturing cost, easy integration and miniaturization, and is very suitable for large-scale production at a nanoscale size, and can be used to make nanolasers, Optical devices such as narrow linewidth filters, nanometer-sized nonlinear devices, and biochemical sensors have great potential application value in many fields such as photonic circuits, optical communications, biomedicine, and environmental monitoring.

Description

technical field [0001] The invention belongs to the technical field of nanometer optics and integrated optics, and specifically relates to an optical device based on surface plasmon lattice point resonance, which can be applied in many fields such as lasers, filters, sensors and nonlinear devices. Background technique [0002] Surface plasmon (Surface Plasmon, SP) is a unique electromagnetic wave formed by the interaction of free electrons and light waves on the metal surface. It has unique optical properties such as breaking through the optical diffraction limit, subwavelength propagation and near-field enhancement, and can realize The manipulation and processing of photons at the nanometer scale has drawn widespread attention. In recent years, localized surface plasmon resonances (LSPRs) supported by individual metallic nanostructures have been widely used in spectroscopy and sensing due to their local electromagnetic field enhancement properties in deep subwavelength volu...

AI Technical Summary

Problems solved by technology

However, in practical applications, it is very difficult to match the dielectric environment on both sides to make the refractive index equal, especially in the case of commonly used devices such as glass or silicon-based substrates, which makes it impossible to use water, solutions or Air is directly used as the medium on the other side of the metal nanostructure, but it is necessary to find an additional material for the device that is equal to or similar to the refractive index of the substrate to create the medium environment on the other side

Obviously, this harsh requirement not only greatly limits the field of device application, but also greatly increases the production cost of the device, and also brings a lot of inconvenience in use.

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