Electromagnetic wave beam regulating and controlling device

Abstract

The invention relates to a wave beam regulating and controlling device which comprises a metal layer and a medium layer. The wave beam regulating and controlling device is characterized in that the thickness of the metal layer is smaller than one third of an operating wavelength, the thickness of the medium layer is smaller than a half of the operating wavelength, the total thickness of the metal layer and the medium layer which are alternately stacked is not more than two wavelengths, and the metal layer is provided with super cells which comprise a plurality of metal resonant units. The metal resonant units are utilized to regulate and control phases, consequentially, regulation and controlling of wave beams are achieved, and therefore the wave beam regulating and controlling device is ultra-thin in thickness. Phase control which is wide in frequency band and high in efficiency is generated by using a locally resonant mode of a multilayer metal structure through near-field coupling, and consequentially efficient regulation and controlling over the wave beams is achieved. The electromagnetic wave beams are regulated and controlled by using a plane structure, preparation is simple, price is low, and therefore high economic benefits are possessed.

Description

technical field [0001] The invention relates to a beam control device, in particular to a device for beam control using metamaterials. Background technique [0002] Beam steering is a very important means for people to override electromagnetic waves. Beam steering devices are very important for device applications. The scope of beam steering includes focusing, divergence, wavelength division multiplexing, beam deflection, beam mode conversion, etc. of electromagnetic waves. Lens is a basic device for focusing and diverging electromagnetic waves, and it is widely used in both optical and microwave bands. Wavelength division multiplexing, beam steering, and beam patterns can be realized by special gratings. The fundamental physical principle to which these devices are applied is Fermat's principle. [0003] Electromagnetic waves follow Fermat's principle when propagating in a medium, that is, when light waves propagate from one point to another, they travel along the path ...

AI Technical Summary

Problems solved by technology

However, these existing metal resonant units (lightwave antennas) are difficult to achieve these conditions at the same time

As mentioned above, the V-shaped light wave antenna can adjust the phase of the scattered wave in the range of 0-360o, but it can only weakly modulate the scattering amplitude of the light wave, so the beam control efficiency is very low, and the total conversion efficiency is less than 10%.

In the research work of V.M.Shalaev et al., although the light wave is deflected in a large angle range, its effective transmittance and reflectivity are less than 3%.

For a single-layer metal pinhole array, the resonant tunneling of its localized mode makes the outgoing wave and the incident wave in phase at the ultra-transparent radio frequency point, so its phase control ability is limited

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