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Disorder substructure grating and grating design method through cubic random function

A random function, disordered technology, applied in diffraction grating, optics, optical components, etc., can solve the problems of difficult design, limited application, limited angle spectrum and bandwidth, etc., to achieve the effect of strong control ability

Active Publication Date: 2016-10-12
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ordered structure is easy to design and the manufacturing process is relatively mature, but there are problems such as limited angle spectrum and bandwidth
The disordered structure can improve the performance on the angular spectrum and bandwidth, but the disordered structure is usually randomly obtained due to large process errors in the manufacturing process of material precipitation growth and pattern etching. How to design the disordered structure, what design Such a disordered structure needs further research, and it is difficult to design through a systematic method, resulting in limited application

Method used

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  • Disorder substructure grating and grating design method through cubic random function
  • Disorder substructure grating and grating design method through cubic random function
  • Disorder substructure grating and grating design method through cubic random function

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Experimental program
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Effect test

Embodiment 1

[0035] The disordered substructure grating includes multiple one-dimensional disordered substructure long-period gratings. The one-dimensional disordered substructure long-period grating includes periodic units arranged periodically along the X-axis. The period unit includes several period subunits. The period subunits It includes a number of different substructures arranged along the X-axis. The periodic unit structures of the same one-dimensional disordered substructure long-period grating are the same, and each one-dimensional disordered substructure long-period grating is arranged along the Y-axis to obtain a two-dimensional The ordered substructure long period grating, and the two-dimensional disordered substructure long period grating are arranged on the grating substrate.

[0036] Preferably, the substructures in the periodic subunits are selected from alternative substructures, and the types of substructures in the alternative substructures are 1 to 3 more than the type...

Embodiment 2

[0048] Such as Figure 1~5 , in the disordered substructure grating of this embodiment, one period unit in the one-dimensional disordered substructure long period grating includes three period subunits:

[0049] The substructures in the first periodic subunit are successively a square substructure, a triangular substructure, a second U-shaped trough substructure, and a first U-shaped trough substructure;

[0050] The substructures in the second periodic subunit are successively the first U-shaped trough substructure, the triangular substructure, the third U-shaped trough substructure, and the second U-shaped trough substructure;

[0051] The substructures in the third periodic subunit are a square substructure, a third U-shaped trough substructure, a first U-shaped trough substructure and a second U-shaped trough substructure in sequence.

[0052] The notch of the first U-shaped trough structure faces upward, the notch of the second U-shaped trough structure faces downward, a...

Embodiment 3

[0068] The disordered substructure gratings in this embodiment include three types of one-dimensional disordered substructure long-period gratings, and the three kinds of one-dimensional disordered substructure long-period gratings are arranged along the Y axis to form a grating period unit in the Y-axis direction, and the Y-axis direction The grating periodic units are arranged periodically along the Y axis to obtain a two-dimensional disordered substructure long-period grating. The one-dimensional disordered substructure long period grating includes periodic units arranged periodically along the X axis, each period unit includes 3 period subunits, each period subunit includes 4 different substructures arranged along the X axis, and Each period unit structure of a one-dimensional disordered substructure long-period grating is the same, and each one-dimensional disordered substructure long-period grating is arranged along the Y axis to obtain a two-dimensional disordered substr...

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Abstract

The invention discloses a disorder substructure grating which comprises a number of one-dimensional disorder substructure long-period gratings. Each one-dimensional disorder substructure long-period grating comprises period units which are periodically arranged along X axis. Each period unit comprises a number of period sub-units. Each period sub-unit comprises a number of substructures which are arranged along X axis and are different from each other. The period units of the same one-dimensional disorder substructure long-period grating share the same structure. The one-dimensional disorder substructure long-period gratings are arranged along Y axis to acquire two-dimensional disorder substructure long-period gratings. The invention further discloses a grating design method through a cubic random function. According to the invention, an order structure and a disorder structure are integrated; the advantages of the order structure are inherited, and at the same time the manipulation ability of the disorder structure is stronger in terms of bandwidth, angle and the like; the light trapping effect is improved nearly 100% than that of other disorder structures in the large bandwidth range from 300 to 1000nm; and broad-spectrum light can be trapped near the Lambertian limit.

Description

technical field [0001] The invention relates to the technical field of grating design, in particular to a disordered substructure grating, and also to a method for designing the grating through a cubic random function. Applicable to spectroscopy, integrated optoelectronic devices, communications, sensing, liquid crystal panels, solar cells, and atomic energy. Background technique [0002] Surface optical structures such as gratings, photonic crystals, and other ordered and disordered optical structures can adjust the bandwidth, polarization, angle, and resonance of incident light and reflected light to achieve optical coupling, optical pulse shaping, and optical filtering. , grating reflectors, optical anti-reflectors, optical absorbers, and optical resonators, etc., have a wide range of applications in spectroscopy, integrated optoelectronic devices, communications, sensing, liquid crystal panels, solar cells, and atomic energy. [0003] There are three types of surface op...

Claims

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Application Information

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IPC IPC(8): G02B5/18G02B27/00
CPCG02B5/1819G02B5/1847G02B27/0012
Inventor 侯金洪卫王文珍杨春勇陈少平
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES