Reflective aluminum nanorod array and method for realizing color hologram by using same

Abstract

Provided is a reflective aluminum nanorod array. Each nanorod and a magnesium fluoride layer, an aluminum reflective layer and a dielectric substrate layer corresponding to the nanorod constitute a unit structure. The unit structures have narrow band response to red, green and blue light respectively, and the unit structures are recorded as a unit structure R, a unit structure G and a unit structure B respectively. The three unit structures are alternately arranged in sequence in the length direction of the unit structures. A method for realizing color hologram by using the reflective aluminum nanorod array comprises the steps of determining the main wavelength of response, finding out the side length of the unit structures, the thickness of the magnesium fluoride layers and the width, height and length of the nanorods, calculating the arrangement period size, the number of units and the orientation angle, and arranging the three unit structures alternately for color hologram. The advantages are as follows: the process is simple and has high stability and reliability; the aluminum nanorod corresponding to each structure parameter modulates the phase of light of only one color, and there is no crosstalk between light of different colors; and the reflective aluminum nanorod array and the method can be widely used in true color 3D display, information storage and other fields.

Description

technical field [0001] The invention relates to the fields of micro-nano optics and optical holography, in particular to a reflective aluminum nanorod array and a method for realizing color holography by using it. Background technique [0002] Ordinary photography records the amplitude of light based on the principle of geometric optics imaging, which loses the phase of the light wave, thus losing the three-dimensional information of the object. If the amplitude and phase of the object light wave can be recorded at the same time, so that all the information of the object light wave front can be stored, such an image is called a "hologram". When the hologram is irradiated with light waves, the light waves of the original object can be reproduced due to the principle of diffraction, thus forming a realistic image with the original object with three-dimensional feeling and parallax. This process is called holography. [0003] Traditional holography uses laser light for interfe...

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However, the lamination structure discussed in the former is complicated to manufactur

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