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Geometric phase type super lens for generating Airy beams

A technology of Airy beams and metalens, applied in the direction of lenses, optics, optical components, etc., can solve the problems of expensive photolithography technology of phase masks, achieve the effect of reducing volume and weight, flexible control ability, and improving work efficiency

Active Publication Date: 2021-06-01
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But these methods also have some disadvantages, for example, the fabrication of the phase mask requires expensive photolithography to generate the pattern carrying the phase modulation

Method used

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  • Geometric phase type super lens for generating Airy beams
  • Geometric phase type super lens for generating Airy beams
  • Geometric phase type super lens for generating Airy beams

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Embodiment Construction

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Several embodiments of the invention are shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be thorough and complete.

[0024] It should be noted that if there are directional indications such as up, down, left, right, front, back, etc. in the embodiment of the present invention, the directional indications are only used to explain the position of each individual in a certain posture as shown in the attached figure. If the relative positional relationship, movement conditions, etc. between the components change, the directional indication will also change accordingly.

[0025] In one embodiment, combined with figure...

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Abstract

The invention discloses a geometric phase type super lens for generating Airy beams, which is mainly based on generalized Snell's law and geometric phase, and designs a planar ultra-thin super lens for generating Airy beams. The super lens comprises glass serving as a lens substrate, and a micro-nano titanium dioxide cubic structure layer arranged on the upper surface of the glass and used for modulating an incident light beam. According to the super lens based on the single-layer micro-nano titanium dioxide cuboid array type distribution structure of different rotation angles, the problems that a device is heavy and the structure is complex in a traditional Airy beam generation method are solved; and the micro-nano structure is adopted to improve the traditional mode of generating one-dimensional, two-dimensional and array Airy beams, the size and weight of the lens are reduced as much as possible, and the miniaturization and integration trend of modern optical devices or photoelectric devices is met.

Description

technical field [0001] The invention belongs to the fields of micro-nano optics, generation of structured light beams, metamaterials / metasurfaces / metalenses, and particularly relates to a geometric phase-type hyperlens for generating Airy beams. Background technique [0002] Airy beams were first proposed in the context of quantum mechanics by Berry and Balazs in 1979. As a non-extended solution to the free-potential Schrödinger equation, it was first observed experimentally by Siviloglou et al. Airy beams have attracted extensive attention due to their self-bending behavior, lateral acceleration, and self-healing properties. This feature also makes Airy beams carry a self-bending propagation direction phase gradient, and has potential applications in optical communication and optical manipulation. [0003] Airy beam generation is based on the angular Fourier spectrum of the exponentially truncated Airy function, which is a Gaussian beam with cubic phase modulation. In thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/00G02B1/11G02B3/00
CPCG02B1/002G02B1/11G02B3/0006G02B3/0037
Inventor 沈哲王子尧
Owner NANJING UNIV OF SCI & TECH
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