Three-plate group detection system of silver-doped defect negative refraction photonic crystal

Abstract

The invention discloses a silver-doped defect negative refraction photonic crystal three-flat plate group detection system. The system comprises upper, middle and lower parallel flat plate lenses with silver-doped defect impurities, wherein silver-doped defects on the upper and the lower flat plate lenses are in bilateral symmetry relative to central axis Y and in longitudinal symmetry relative to central axis X, the central axis Y in the top row is taken as a boundary, seventh air holes which are respectively arranged in the left direction and the right direction of the central axis X are the silver-doped defects, and in the various rows of air holes below the top row of the air holes row by row, the air holes which are sequentially dislocated outwards in the left direction and the right direction are the silver-doped defects till the air holes in the row in which the central axis X is located; the silver-doped defects on the middle flat plate lens are in bilateral symmetry relative to the central axis Y, the central axis Y in the top row is taken as the boundary, the fifth air holes which are respectively arranged in the left direction and the right direction of the central axis X are the silver-doped defects, and from the various rows of the air holes from top to bottom, the air holes which are sequentially dislocated outwards in the left direction and the right direction are the sliver-doped defects, so that the re-focusing resolution of the system is improved.

Description

technical field [0001] The invention belongs to the field of optical technology, more precisely, relates to an optical technology for making a super lens by using the negative refraction effect of a photonic crystal flat plate. Background technique [0002] The traditional imaging device - the lens, mainly relies on the curvature of its surface to make the optical system image. The resolution of the ordinary lens cannot reach the level of light wavelength (the wavelength range of visible light is 390nm-780nm); the gradient index lens is composed of refractive index Composed of cylindrical media distributed parabolically along the radial direction, it can play two functions of focusing (scattering) light or imaging. It has the characteristics of small focus spot diameter and high resolution, so it is widely used in optical fiber coupling, light splitting , demultiplexing, optical switches, miniaturization of copiers, laser disc recording, etc. [0003] Left-handed materials ...

AI Technical Summary

Problems solved by technology

Incorporating a few defects further improves the refocusing resolution compared to a single defect-free negative refraction photonic crystal lens, and the refocusing resolution reaches 0.165 ( equal ), but its vertical detection distance on the Y axis is small, and the refocusing resolution is still small

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