Metal membrane lens including nano seam

Abstract

The invention relates to a metal film lens with nano-suture, and is characterized in that: an incident wave is firstly determined, and then proper substrate material is chosen, a layer of metal film is vapor deposited on a substrate, the incidence of the incident wave is vertical to the surface of a metal film, and then the skin depth of the incident wave in the chosen metal film is computed; the direction of X axis is chosen along the metal film, and sampling is implemented along the forward direction of X axis; then the width of the metal suture of each sample point is computed by computing the phase offset and the propagation constant of each sample point; a suture distribution along the negative direction of the X axis which is symmetrical to the suture distribution along the forward direction is chosen; finally the suture width of each sample point is obtained according to the design; then a metal film lens with nano-suture is produced by using the existing processing technology. The invention can change the suture distribution of the metal film lens according to the position of any given objective image to achieve the near field imaging or the distant field imaging, simultaneously the designed lens of the invention has simple structure, and can be used for the optical system integration extremely conveniently, the lens has extensive application prospect.

Description

technical field [0001] The invention relates to a metal nano-slit array imaging device, in particular to a metal film lens containing a nano-slit. Background technique [0002] In recent years, nanotechnology has developed by leaps and bounds, and its application in biomedical detection has also put forward new requirements for corresponding near-field optical imaging. Various imaging devices are gradually developing towards miniaturization and integration. . In a series of new imaging devices, superlens (Superlens) has attracted more and more attention. The biggest advantage of superlens is that it can break through the traditional diffraction limit, thereby achieving a high imaging resolution; however, its disadvantages are also obvious. , because the superlens imaging utilizes the principle of evanescent wave amplification, the imaging position is limited to a very close distance from the silver layer, generally tens of nanometers, although the superlens imaging can be b...

AI Technical Summary

Problems solved by technology

In a series of new imaging devices, superlens (Superlens) has attracted more and more attention. The biggest advantage of superlens is that it can break through the traditional diffraction limit and achieve a high imaging resolution; however, its disadvantages are also obvious. , because the superlens imaging utilizes the principle of evanescent wave amplification, the imaging position is limited to a very close distance from the silver layer, generally tens of nanometers, although the superlens imaging can be brought to the far field by adding other structures, but its The structure is very complex and requires high alignment accuracy, which is not conducive to system integration

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