A method for surface holography based on ω-shaped conformal metasurfaces

A curved and meta-technology, applied in the field of curved holography, can solve the problems of complex design theory, and achieve the effect of improving flexibility, increasing storage capacity and strong robustness.

Active Publication Date: 2020-04-21
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the optical range, these design theories are very complicated, and there are certain challenges for the processing of such conformal metasurfaces.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for surface holography based on ω-shaped conformal metasurfaces
  • A method for surface holography based on ω-shaped conformal metasurfaces
  • A method for surface holography based on ω-shaped conformal metasurfaces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] In order to better illustrate the purpose and advantages of the present invention, the content of the invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] like figure 1 As shown, the method for realizing curved surface holography based on the Ω-type conformal metasurface disclosed in this embodiment, the specific implementation steps are as follows:

[0036]Surface holography realized by Ω-shaped conformal metasurface. Using the conformal metasurface wrapped on the surface of the curved substrate to modify the outgoing light wavefront to realize the surface holography, such as figure 2 shown.

[0037] Step 1: The metasurface is composed of Ω-shaped gold nanoantenna arrays with the same structural size. By changing the rotation angle of a single Ω-shaped gold nanoantenna The phase, amplitude and polarization of the outgoing beam can be adjusted arbitrarily by the metasurface. The geometric dimensions men...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for achieving curved surface holography based on a [omega]-shaped conformal metasurface, and belongs to the technical field of micro-nano optics and holography. The implementation method comprises the following steps of: firstly, accurately designing a metasurface unit structure, wherein the metasurface is formed by [omega]-shaped gold nano antennas, the rotation angles of the [omega]-shaped gold nano antennas are changed to allow the metasurface to perform any regulation and control of the phase of an emitted light beam; secondarily, adopting a FDTD (Finite-Different Time-Domain) to calculate an original curved surface [Phi]o and achieve phase distribution [Phi]d of the curved surface holography, wherein the phase distribution of the conformal metasurfaceis equal to the phase difference [Phi]p of the phase distribution of the curved surface and the phase distribution of the curved surface holography; and based on the berry phase principle, performingencoding of the phases by adopting the [omega]-shaped gold nano antennas with the same structure and different rotation angles according to the obtained phase distribution [Phi]p so as to achieve theeffect of the curved surface holography. The corresponding wave front modulation is achieved based on the [omega]-shaped conformal metasurface, and the method for achieving curved surface holography based on the [omega]-shaped conformal metasurface is applied to photoelectric devices in any shapes. The method for achieving curved surface holography based on the [omega]-shaped conformal metasurfacecan be used for spatial multiplexing of holographic images and improves the storage capacity of information.

Description

technical field [0001] The invention relates to a method for realizing curved surface holography by modulating the wavefront of an arbitrary curved surface object based on an Ω-type conformal metasurface, and belongs to the field of micro-nano optics and holographic technology. Background technique [0002] Metasurfaces are composed of periodic, quasi-periodic, or randomly distributed subwavelength nanoantennas that locally modify the amplitude, phase, and polarization of electromagnetic waves. By precisely designing the geometric parameters and azimuth angles of each metasurface unit in the array, the metasurface modulates the wavefront of the incident light to achieve some specific functions. In addition, compared with many conventional optical components, metasurfaces have subwavelength feature sizes, and thus have the advantages of ultrathinness, flexibility, and ease of fabrication. Due to the unique optical properties of metasurfaces, a wide range of applications have...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/00G03H1/02G03H1/26G02F1/01
CPCG02B27/0012G02F1/01G03H1/02G03H1/26
Inventor 黄玲玲韩娜林泽萌王涌天
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products