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Out-of-order sub-structure grating and method for designing optical grating through secondary random function

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

Active Publication Date: 2016-11-02
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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  • Out-of-order sub-structure grating and method for designing optical grating through secondary random function
  • Out-of-order sub-structure grating and method for designing optical grating through secondary random function
  • Out-of-order sub-structure grating and method for designing optical grating through secondary random function

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Effect test

Embodiment 1

[0031] The disordered sub-structured grating includes a plurality of one-dimensional disordered sub-structured long-period gratings. The one-dimensional disordered sub-structured long-period grating includes periodic units arranged periodically along the X axis, and the periodic units include different ones arranged along the X axis. Several substructures, each periodic unit in the same one-dimensional disordered substructure long period grating has the same structure, and each one-dimensional disordered substructure long period grating is arranged along the Y axis to obtain a two-dimensional disordered substructure long period grating. The long-period grating with a disordered substructure of one dimension is arranged on the grating substrate.

[0032] Preferably, the one-dimensional disordered substructure long period gratings are of Q types, and Q is greater than or equal to 1, and the Q types of one-dimensional disordered substructure long period gratings are arranged along th...

Embodiment 2

[0043] Such as Figure 1~4 In the disordered substructure grating of this embodiment, the substructure order of the periodic units in the one-dimensional disordered substructure long period grating is triangular substructure, first U-shaped groove substructure, square groove substructure, second U-shaped For the groove structure, the notch of the first U-shaped groove substructure faces upward, and the notch of the second U-shaped groove substructure faces downward. One-dimensional disordered sub-structure long-period grating is a kind of one-dimensional disordered sub-structure long-period grating arranged along the Y axis to obtain a two-dimensional disordered sub-structure long-period grating. Others are consistent with Example 1.

[0044] In the method for designing a grating by a quadratic random function in this embodiment, each substructure of the periodic unit is selected from candidate substructures, and the type of substructure in the candidate substructure is one more ...

Embodiment 3

[0049] Such as Figure 5-7 In the disordered substructure grating in this embodiment, there are three types of one-dimensional disordered substructure long-period gratings. The three types of one-dimensional disordered substructure long-period gratings are arranged along the Y axis to form a Y-axis direction grating periodic unit. The Y-axis direction grating periodic unit is periodically arranged along the Y-axis to obtain a two-dimensional disordered sub-structure long-period grating.

[0050] The substructure sequence of the periodic units in the first type of one-dimensional disordered substructure long period grating is the second U-shaped groove substructure, the triangular substructure, the first U-shaped groove substructure, and the square substructure.

[0051] The substructure sequence of the periodic units in the second type of one-dimensional disordered substructure long-period grating is triangular substructure, first U-shaped groove substructure, square substructure, ...

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Abstract

The invention discloses a disordered sub-structure and long-period grating, which comprises a plurality of one-dimensional disordered sub-structure and long-period gratings. The one-dimensional disordered sub-structure and long-period gratings are composed of periodic units periodically arranged along the X-axis. The periodic units are composed of several different sub-structures arranged along the X-axis. All periodic units in each single one-dimensional disordered sub-structure and long-period grating are the same in structure and all one-dimensional disordered sub-structure and long-period gratings are arranged along the Y-axis to form a two-dimensional disordered sub-structure and long-period grating. The invention further discloses a method for designing the grating through a secondary random function. According to the technical scheme of the invention, an ordered structure and a disordered structure are integrated together. In this way, the advantages of the ordered structure can be maintained, and the disordered structure is better in control capability in terms of bandwidth, angle and the like. When the large bandwidth range of the optical wavelength is 300-1000 nm, the light tripping effect is improved by nearly 90% compared with other disordered structures.

Description

Technical field [0001] The invention relates to the technical field of grating design, in particular to a disordered sub-structured grating, and also to a method for designing a grating through a quadratic random function. It is suitable for 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 reflector, light anti-reflector, light absorber and optical resonator, 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 optical stru...

Claims

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Application Information

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IPC IPC(8): G02B5/18G02B27/00
CPCG02B5/1819G02B5/1847G02B27/0012
Inventor 侯金杨春勇洪卫
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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