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Method for preparing three-dimensional photonic lattices or photonic quasi-crystals

A photonic lattice and photonic quasi-crystal technology, applied in optics, optical components, instruments, etc., can solve the problems of high system complexity, reduced device stability, and increased production costs, to expand the scope of application and achieve good stability. , the effect of low production cost

Inactive Publication Date: 2017-06-13
ZHONGYUAN ENGINEERING COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, multi-beam interference often requires complex optical systems to achieve
The greater the number of beams required for interference, the more complex the system
This leads to a decrease in the stability of the device, which is not good for production
Especially for (n+1) light beam interference, it is almost difficult to achieve with traditional interference methods
In addition, the complex device increases the investment and raises the production cost

Method used

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  • Method for preparing three-dimensional photonic lattices or photonic quasi-crystals
  • Method for preparing three-dimensional photonic lattices or photonic quasi-crystals
  • Method for preparing three-dimensional photonic lattices or photonic quasi-crystals

Examples

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Embodiment 1

[0027] Such as image 3 As shown, using the hexagonal prism with a hole in the center to generate (6+1) beams of light interference, a three-dimensional periodic photonic lattice structure is fabricated in the photorefractive material. In this example, the laser used is a solid-state laser with a wavelength of 532 nm and a power of 100 mW, and the photorefractive material is lithium niobate crystal.

[0028] (a) is a schematic diagram of the hexagonal prism with a central opening and the (6+1) light beam interference configuration it produces; (b) is the front view and side view of the fabricated three-dimensional periodic photonic lattice structure (upper right corner inset).

Embodiment 2

[0030] Such as Figure 4 As shown, a three-dimensional photonic quasicrystal structure fabricated using a five-wedge prism with a central opening. (a) is a schematic diagram of a penta-wedge prism with a central opening and the (5+1) light beam interference configuration it produces; (b) is a front view and a side view of the fabricated 3D photonic quasicrystal structure (inset in the upper right corner) .

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Abstract

The invention provides a method for preparing three-dimensional photonic lattices or photonic quasi-crystals. The method comprises the following steps that laser beams sent out by a laser device are expanded through a beam expander, and then become wide and parallel light beams to irradiate to a multi-wedge prism with the center open; the wide and parallel light beams are transformed into mutually overlapped (n+1) beams of light through the multi-wedge prism with the center open, and a three-dimensional interference light field; a photorefractive material is placed in the three-dimensional interference light field, and the three-dimensional photonic lattices or the photonic quasi-crystals are prepared through exposure. The method is simple in device structure and good in stability and does not need precision adjusting equipment. Only one single multi-wedge prism with the center open is needed, the (n+1) beams of light interference can be achieved, the three-dimensional interference light field is generated, the three-dimensional photonic lattices or the photonic quasi-crystals are further prepared, and the preparing process is simple and reliable.

Description

technical field [0001] The invention relates to the field of photonic microstructure manufacturing, in particular to a method and a device for making three-dimensional photonic lattices or photonic quasicrystals. Background technique [0002] Photonic lattice is an artificial structure with periodic distribution of dielectric coefficient. It is a new type of photonic material and belongs to the category of photonic microstructure. Two-dimensional and three-dimensional photonic lattices provide a new possibility for all-optical information processing and manipulation of photon motion behavior in micro-nanophotonics. Photonic quasicrystals are a new type of photonic material that combines the characteristics of quasicrystal structures and photonic microstructures. It has a high degree of rotational symmetry, which has a significant impact on the optical properties of the structure. The study found that the photonic quasicrystal structure has many interesting properties that d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/00
CPCG02B1/005
Inventor 靳文涛张雪华李林
Owner ZHONGYUAN ENGINEERING COLLEGE
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