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Multifunctional polarization adjusting component based on three-dimensional composite structural unit

A structural unit, three-dimensional composite technology, applied in polarizing elements, optical elements, instruments, etc., can solve problems such as application limitations and large device volume

Active Publication Date: 2019-06-18
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of miniaturization and integration of optoelectronic devices, the traditional polarization control scheme based on optical crystals is limited in application due to the large size of the device.

Method used

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  • Multifunctional polarization adjusting component based on three-dimensional composite structural unit
  • Multifunctional polarization adjusting component based on three-dimensional composite structural unit
  • Multifunctional polarization adjusting component based on three-dimensional composite structural unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: Disclose a multi-functional polarization state control component, combined with figure 1 as shown, figure 1 (a) is the array diagram of the T-shaped composite structural unit. By selecting appropriate structural parameters, the period of the T-shaped composite structural unit is 3.6±0.2 microns, the height of the taller and longer square brick structure is 1.9±0.1 microns, and the length is 2.7±0.1 microns; the height of the shorter and shorter bricks is 1.3±0.1 microns, and the length is 1.6±0.1 microns; the width of both brick structures is 0.5±0.05 microns. The gap spacing (gap) between the taller and longer bricks and the shorter and shorter bricks is 0.76±0.03 microns. In addition, the brick structure and the upper surface of the substrate around the brick are covered with a continuous metal film, and the thickness of the metal film is 35±5 nanometers. At this time, when the polarization direction of the incident light is along figure 1In the x-axi...

Embodiment 2

[0033] Embodiment 2: Disclose another kind of multifunctional polarization state control component, combine figure 2 As shown in (a) and (b), figure 2 (a) is an array diagram of an X-shaped composite structural unit, figure 2 (b) is a detailed view of the X-shaped composite structural unit. By choosing appropriate structural parameters, the X-shaped composite structural unit period is 3.6±0.2 microns. The height of the taller and longer brick structure is 1.9±0.1 microns, and the length is 4.5±0.1 microns. The height of the two shorter and shorter bricks is 1.1±0.1 microns, and the length is 1.7±0.1 microns. The width of both brick structures is 0.3 ±0.03 microns. The gap spacing between the taller and longer square bricks and the shorter and shorter square bricks is 0.27±0.02 microns. The three brick structures and the upper surface of the substrate around the bricks are covered with a continuous metal film with a thickness of 35±5 nanometers. At this time, when the p...

Embodiment 3

[0039] Embodiment 3: as image 3 As shown, samples with specific patterns are further designed by using X-shaped composite structural units with different orientations, that is, the three-dimensional X-shaped structural units are used as the smallest pixel unit of the image, arranged periodically to form multiple target images, and then using the infrared focal plane The array imaging system performed optical imaging of the sample at different frequencies and different polarization settings, and the results further confirmed the effectiveness of our multifunctional design.

[0040] image 3 (a) The pixel points of the pattern "E=hν" are represented by an X-shaped compound structure with different rotation angles. Based on the first character, the four characters are rotated clockwise by 0°, 45°, and 90° respectively. °, 135° X-shaped composite structural units are arranged. It should be noted that the rotation here means figure 2 The structural unit in (b) rotates around t...

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Abstract

The invention discloses a multifunctional polarization adjusting component based on a three-dimensional composite structural unit. A surface of a metal film has multiple periodically arranged three-dimensional T-shaped structural units; the three-dimensional T-shaped structural units include a first structure and a second structure which are both square tile-shaped structures, and the first structure and the second structure are vertically arranged and spaced apart to form an approximately T-shaped structure; a first frequency band has the quarter-wave plate function, a second frequency band has the half-wave plate function, and the first frequency is lower than the second frequency. Similarly, the multi-functional polarization adjusting component based on the three-dimensional composite structural unit is disclosed, a first frequency band has the half-wave plate function, and a second frequency band has the quarter-wave plate function. The adjusting component is advantaged in that thecomposite structural unit can be utilized to realize different optical functions in different working frequency bands in the infrared band to further promote miniaturization and integration of an optical component.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic functional devices and material preparation, and in particular relates to polarization adjustment components capable of realizing different wave plate functions in different frequency bands through the design of three-dimensional composite structural units. Background technique [0002] Polarization modulation has important applications in many research fields such as modern optics and optoelectronics. How to precisely and flexibly control the polarization state has always been an important issue in the research of optics and photonics. In the past, birefringent crystals in nature have been used to achieve polarization conversion of light. With the development of miniaturization and integration of optoelectronic devices, the traditional polarization control scheme based on optical crystals is limited in application due to the large size of the device. To further reduce the size of optical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/00G02B5/30
Inventor 王牧熊翔彭茹雯孙思嘉高雅君陈飞范仁浩郝西萍
Owner NANJING UNIV
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