Method for generating real space and K space Airy beam array based on metasurface

An Airy beam, real space technology, applied in the field of micro-nano optics, can solve the problems of complex power generation system, bulky light modulator, not suitable for optical micro-operation, etc., achieve high transmission efficiency, small size, and improve parallel work efficiency Effect

Active Publication Date: 2021-07-30
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

And some of these methods, such as mechanical modulation, usually make the power generation system v

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  • Method for generating real space and K space Airy beam array based on metasurface
  • Method for generating real space and K space Airy beam array based on metasurface
  • Method for generating real space and K space Airy beam array based on metasurface

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Embodiment

[0039] Embodiment: Generation method of Airy beam array

[0040] Such as figure 1 As shown, the method for controlling and generating an Airy beam array based on metasurfaces in real space and K space disclosed in this embodiment, the specific implementation method is as follows:

[0041] Step 1: In order to realize the generation of Airy beam array based on the broadband dielectric metasurface, the simulation method is used to simulate the nanoantenna, as shown in figure 2 As shown, Airy beam arrays are generated in real space and K space under the incident conditions of different chiral polarized light. The different circular polarization states of the incident light field can be tuned independently by the precise selection and rotation of the nanopillars. Design the geometric dimensions of the nano-column unit so that the nano-column selects a set of propagation phase modulation to be 0-2π under the light irradiation of the working wavelength (800 nanometers) and has the...

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Abstract

The invention discloses a method for generating real space and K space Airy beam arrays based on a metasurface, and belongs to the field of micro-nano optics. The method comprises the following steps: performing analog calculation on the nano antenna by adopting a simulation method, accurately and effectively regulating and controlling the propagation distance and the propagation track of an emergent Airy beam by adjusting the size and azimuth angle distribution of a nano column array, and selecting to obtain the nano antenna meeting the metasurface composition requirement; after the geometric dimensions of the nano-column units are determined, obtaining the dimensions and azimuth angle distribution of the nano-column arrays covering 0-2pi phases according to a phase distribution algorithm for generating real space and K space Airy beam arrays, i.e., determining the dimensions and rotation angles of each nano-column unit, and coding and generating a processing file of a corresponding medium metasurface structure; processing the broadband medium metasurface by utilizing a processing file and adopting a micro-nano processing technology; when different circularly polarized light beams are incident, obtaining Airy beam arrays in a real space and a K space, thereby improving the parallel working efficiency of the device remarkably.

Description

technical field [0001] The invention relates to a method for generating an Airy beam array, in particular to a method for generating a real-space and K-space Airy beam array based on a broadband dielectric metasurface independently encoded by dual circular channels, and belongs to the field of micro-nano optics. Background technique [0002] As a kind of non-diffraction beam, the Airy beam has very attractive characteristics such as non-diffraction, self-acceleration, and self-recovery when transmitted in free space. Unlike Bessel beams, Airy beams do not rely on a simple conical superposition of plane waves, although they are both defined as unscattered light. Since Berry and Balazs predicted in the field of quantum mechanics that the Schrödinger equation would have a wave packet solution that satisfies the Airy function, researchers have found that the Airy function characterized by an exponential "cutoff" is also a solution to the Schrödinger equation, and for the first t...

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Application Information

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IPC IPC(8): H01Q1/38H01Q21/00
CPCH01Q1/38H01Q21/0006H01Q21/0087
Inventor 黄玲玲雷石伟王涌天李晓伟
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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