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Lens and method for generating Airy beam based on phase discontinuous super surface

A discontinuous, metasurface technology, applied to electrical components, antennas, etc., can solve problems such as difficulty in integration, inapplicability to X-band, and large excitation devices

Active Publication Date: 2018-08-31
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that existing Airy beam excitation devices are bulky, difficult to integrate, and cannot be applied to the X-band, thereby providing a lens and method for generating Airy beams based on phase discontinuous metasurfaces

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  • Lens and method for generating Airy beam based on phase discontinuous super surface

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0026] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0028] In this embodiment, the lens for generating Airy beams based on phase-discontinuous metasurfaces includes...

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Abstract

The invention provides a lens and a method for generating an Airy beam based on a phase discontinuous super-surface, relates to the technique of generating an Airy beam, and aims to solve the problemthat the excitation device of the existing Airy beam is bulky, difficult to integrate, and cannot be applied to the X-band. The lens comprises a plurality of structural units arranged in line along astraight line; each structural unit comprises a dielectric plate and metal rings on the lower surface of the dielectric plate, the two metal rings are the same size, the centers of the two metal ringsare coincided with the center of the dielectric plate, the metal rings are provided with notches, and the notches of the two metal rings are symmetric about the center; the plurality of structural units are divided into multiple groups, the notches of the metal rings on the upper surfaces of the same group of structural units are the same in the direction, the notches of the metal rings of two groups of the structural units sandwiched with one group of the structural unit are the same in the direction, and the notches of the metal rings of adjacent groups of the structural units are differentby 90 DEG in the direction. The lens and the method are suitable for generating Airy beams.

Description

technical field [0001] The present invention relates to techniques for generating Airy beams. Background technique [0002] In 1979, Berry and Balazs made a major discovery in the field of quantum mechanics: the Schrödinger equation describing free particles has a non-diffracting Airy beam solution. The most notable feature of the Airy beam is its self-accelerating property without any external force. Like other non-diffracting beams, an Airy beam is a beam in which the spatial distribution of intensity remains constant during propagation. In recent years, Airy beams have played an important role in plasma channeling, particle manipulation, photobullets, atmospheric communications, and other fields. In general, Airy beams are generated by spatial light modulators (SLMs), specially designed lens systems, nonlinear methods, electrons, plasmons, liquid crystals, surface gratings, subwavelength slit arrays, or surface plasmons. However, the micro-sized pixels of SLMs or liqui...

Claims

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Application Information

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IPC IPC(8): H01Q15/02
CPCH01Q15/02
Inventor 张狂杨海棠吴群
Owner HARBIN INST OF TECH
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