Full-polarized ultra-wideband electromagnetic wave angle selection transparent structure

An angle selection, ultra-broadband technology, applied in the direction of optical components, optics, instruments, etc., can solve problems such as difficult to ensure phase

Active Publication Date: 2019-05-24
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, even if a material with both TE and TM polarization Brewster's total transmission effects can be found in nature, it is difficult to ensure that the Brewster angle of its TM polarization is equal to that of TE polarization

Method used

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  • Full-polarized ultra-wideband electromagnetic wave angle selection transparent structure
  • Full-polarized ultra-wideband electromagnetic wave angle selection transparent structure
  • Full-polarized ultra-wideband electromagnetic wave angle selection transparent structure

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with accompanying drawing.

[0033] Embodiments of the present invention and its implementation process are as follows:

[0034] Such as figure 1 As shown, n periodic plate structures with different period numbers m are densely arrayed on the surface, thus forming an angle-selective transparent surface. Each periodic plate structure is composed of two materials: plate medium A and equivalent electromagnetic medium B. A one-dimensional photonic crystal structure formed by alternate lamination; and both ends of the lamination are equivalent electromagnetic medium B, and the number of alternating lamination cycles is m, that is, the number of flat medium A is m;

[0035] For each i-th periodic plate structure, the thickness of the plate medium A and the equivalent electromagnetic medium B are the same, and the thickness is T i; By setting the individual thicknesses T of different periodic plate structur...

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Abstract

The invention discloses a full-polarized ultra-wideband electromagnetic wave angle selection transparent structure, which is mainly formed by surface close arraying of n cyclic flat plate structures with different cycle numbers. Each cyclic flat plate structure is mainly formed by close alternate lamination of two materials including a flat plate medium and an equivalent electromagnetic medium, wherein two ends of the cyclic flat plate structure are both equivalent electromagnetic media after lamination, and an alternate lamination cycle number is m. The flat plate media and the equivalent electromagnetic media in each cyclic flat plate structure are equal in thickness. By setting of thicknesses of the different cyclic flat plate structures, operating frequency of the cyclic flat plate structures is set; since the cyclic flat plate structures are set to be unequal, different operating frequency distributions are formed on the surface to realize an angle selection transparent surface. An existing research bottleneck is broken through, a traditional design in which only TM polarization angle selection transparency is realized is expanded to TE polarization and arbitrary polarization,and accordingly practical engineering application of the electromagnetic wave angle selection transparent structure is promoted.

Description

technical field [0001] The invention relates to the space angle selection of electromagnetic waves, in particular to an arbitrary polarized ultra-broadband electromagnetic wave angle selection transparent structure. Background technique [0002] Single-frequency planar electromagnetic waves have three basic properties: frequency, polarization direction, and propagation direction. Selecting electromagnetic waves according to these three properties is the most basic requirement for controlling electromagnetic waves. In the past few decades, the frequency selection and polarization selection related devices and structures of electromagnetic waves have undergone tremendous development. In comparison, the direction or angle selection of electromagnetic waves has lagged far behind. [0003] The development of modern science and technology has led more scientists to pay attention to the angle selection of electromagnetic waves at the wavelength or even sub-wavelength scale. In the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/00G02B5/00G02B5/26
Inventor 李柄辉杨彦斌叶德信
Owner ZHEJIANG UNIV
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