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A Multifunctional Flexible Dynamic Polarization Modulation Device

A polarization modulation and multi-functional technology, applied in the direction of electrical components, antennas, etc., can solve the problems of conformal design limitations of artificial structural materials

Active Publication Date: 2019-08-02
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these loaded semiconductor materials or components need to be fabricated on a hard substrate, which brings certain limitations to the conformal design of artificial structural materials in equipment.

Method used

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  • A Multifunctional Flexible Dynamic Polarization Modulation Device
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  • A Multifunctional Flexible Dynamic Polarization Modulation Device

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Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1 Dynamic Polarization Modulation Function of Microwave Section

[0029] like figure 1 Shown is a kind of multifunctional flexible dynamic polarization modulation device of the present invention, and this polarization modulation device comprises: top layer " I " shape gold sub-wavelength structure array, bottom layer gold wire structure array, and middle layer polydimethylsiloxane (PDMS ). Among them, the characteristic size of the "I"-shaped metal Au subwavelength structure on the top layer is l=7mm, w=1mm, d=5mm, t=2.7mm, and the period p in the x direction and y direction x =p y =8mm; the number of bottom metal lines is designed to be two; the dielectric constant of the middle layer PDMS in the microwave band is 1.96. From the structural point of view, the top metal Au subwavelength structure has obvious anisotropy, so the phase difference of reflected electromagnetic waves in two orthogonal directions can be adjusted.

[0030] When a beam of electroma...

Embodiment 2

[0035] Embodiment 2 Dynamic polarization modulation function in the terahertz band

[0036] based on figure 1 The shown flexible polarization dynamic modulation device working in the microwave band can increase its operating frequency from the microwave band to the terahertz band by scaling the size parameters of its unit structure. Among them, the geometric dimensions of the "I"-shaped metal subwavelength structure on the top layer are: l=1.6μm, w=0.3μm, d=1.1μm, thickness t=9μm, period p x =py = 2 μm. In order to improve its reflection efficiency, the number of metal lines at the bottom of the unit structure is increased from two to three.

[0037] In the case of incident linearly polarized waves, the structure completely converts the incident linearly polarized waves into crossed linearly polarized waves at 27.2THz, and the reflectivity curve is as follows Figure 4 (a) shown. When an external force is applied to the subwavelength structure in the x direction and the su...

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Abstract

The invention provides a multifunctional flexible dynamic polarization modulator. The multifunctional flexible dynamic polarization modulator is in a three-layer structure, a top layer and a bottom layer are periodic metal sub-wavelength structural arrays, and a middle layer is a flexible stretchable dielectric layer. By the aid of an external force stretching device, a structural surface shape can be changed, polarization modulation resonance frequency points can be adjusted dynamically, frequency adjustment range in microwave and terahertz wave bands is larger than 20%, incident ray polarization electromagnetic waves at low-frequency resonance points can be converted into cross polarized waves to realize efficient reflection, incident ray polarization electromagnetic waves at high-frequency resonance points are converted into circularly polarized waves to realize efficient transmission, and polarization conversion efficiency is close to 100%. The polarization degree dynamically-adjustable characteristic is also suitable for polarization invisible devices, and due to flexibility of the dielectric layer, a conformal design with existing important equipment can be realized.

Description

technical field [0001] The invention belongs to the technical field of polarization modulation, in particular to a multifunctional flexible dynamic polarization modulation device. Background technique [0002] The traditional polarization modulation technology is mainly realized through anisotropic media or graded waveguides, which have the disadvantages of large volume, single working frequency band, and difficulty in realizing dynamic polarization regulation. The artificial structural materials that have appeared in recent years, which are arranged in an array of artificially designed sub-wavelength unit structures, have extremely powerful control capabilities for electromagnetic waves, and have been widely used to achieve electromagnetic wave radiation characteristics, absorption characteristics, and polarization modulation characteristics. Waiting for human manipulation. Although the subwavelength structure has many advantages such as small size, thin thickness, high en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q3/44H01Q15/00
CPCH01Q3/44H01Q15/00
Inventor 罗先刚马晓亮赵泽宇蒲明博李雄高平郭迎辉
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI