A Holographic Imaging Film Based on Surface Plasmon Coupling Structure

Abstract

The invention discloses a holographic imaging film based on a surface plasma coupling structure. Electron beam lithography is used to prepare an asymmetric nanostructure layer. According to the nano processing technology, Bosch technology is used for reactive ion etching, SF6 is used for etching, C4F6 is used to generate a polymer, etching and passivation are carried out alternatively, the scallop-shaped sidewall shape is formed via horizontal undercutting, a dielectric nano column is obtained, a metal film is deposed in the direction vertical to a substrate, and a metal nanostructure-metal film coupling structure is obtained. A meta-material of the sub-wavelength coupling structure presents harmonic resonance and dark-field excitation plasma resonance modes in a visible light spectrum, multi-formant narrowband resonance is generated, the asymmetric upper-layer nanostructure enables that a reflection array is flexible in color response and high in reflectivity to different incident fields, the reflection array can be applied to the holographic imaging film of color holographic imaging, real 3D images of objects can be recorded and reproduced in real time, and the imaging film can realize real space imaging, is brilliant in colors and high in contrast and sharpness, and can be applied to the fields including commodity display, video production and creation.

Description

technical field [0001] The present invention relates to nanofabrication and manufacturing technology, surface plasmon photonics, and physical optics imaging technology, in particular to a reflective array metamaterial based on surface plasmon coupling resonance effect, and its unique application in full true-color holographic imaging technology. Background technique [0002] Three-dimensional (3D) display technology is divided into two types: one is to use the parallax characteristics of the human eye to produce a three-dimensional effect; the other is to display real 3D stereoscopic images in space, such as stereoscopic imaging based on holographic imaging technology. The hologram uses laser as the light source, using two coherent laser beams. First, the laser beam 1 irradiates the object in the dark room. At the same time, the object emits a scattered laser wave to the space, which is called the object reflected laser wave. In addition, the laser beam 2 emits a laser wave t...

AI Technical Summary

Problems solved by technology

The main reason is that the traditional holographic technology relies on special photosensitive materials for photoresists, which is essentially a non-real-time optical processing technology, and the operation steps are cumbersome and complicated, which limits its further development.

On the other hand, because the color of the hologram is difficult to adjust, the imaging depends on the photosensitive material, and the optical annihilation and readout error of the material itself will easily cause a certain degree of image distortion, and the image data reading process is cumbersome, and it is difficult to perform real-time imaging. It hinders the further development and marketization of 3D display holographic technology

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