A fully polarized, ultra-broadband electromagnetic wave angle-selective transparent structure

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

Active Publication Date: 2021-06-15
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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  • A fully polarized, ultra-broadband electromagnetic wave angle-selective transparent structure
  • A fully polarized, ultra-broadband electromagnetic wave angle-selective transparent structure
  • A fully polarized, ultra-broadband electromagnetic wave angle-selective 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 fully polarized, ultra-broadband electromagnetic wave angle selection transparent structure. It is mainly composed of n periodic flat plate structures with different periodic numbers closely arrayed on the surface. Each periodic flat plate structure is mainly composed of two materials, flat plate medium and equivalent electromagnetic medium, which are closely alternately stacked, and both ends of the stacked are Equivalent electromagnetic medium, the number of periods of alternate stacking is; the thickness of the plate medium in each period plate structure is the same as that of the equivalent electromagnetic medium, and the operating frequency of the period plate structure is set by setting the thicknesses of different period plate structures, and The periodic plate structures are set to be unequal to each other to form different operating frequency distributions on the surface to realize the angle selection transparent surface. The invention breaks through the bottleneck of existing research, expands the traditional design that can only realize TM polarization angle selection and transparency to TE polarization and arbitrary polarization, and promotes the practical engineering application of electromagnetic wave angle selection and transparency structures.

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 Patents(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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