A terahertz wave optical window with adjustable thermal field and its preparation method and application

An optical window and terahertz wave technology, applied in 3D printing and terahertz wave applications, can solve problems such as real-time response to the external environment

Active Publication Date: 2021-06-18
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The terahertz wave optical window can realize the selective transmission of different wavelength terahertz waves under the control of the thermal field, which solves the defect that the traditional optical window cannot respond to the external environment in real time. In particular, the terahertz wave optical window It can also be used as a thermal sensor to realize the early warning and sensing function of temperature changes

Method used

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  • A terahertz wave optical window with adjustable thermal field and its preparation method and application
  • A terahertz wave optical window with adjustable thermal field and its preparation method and application
  • A terahertz wave optical window with adjustable thermal field and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Weigh 4g of vanadium dioxide powder, add it to 4g of Dow Corning SE1700 silica gel, and stir evenly to obtain a slurry with a vanadium dioxide content of 50wt.%, and put the slurry into a 10mL barrel for printing.

[0026] 2. Write the 3D printing program of the wood pile structure, set the distance between the medium rods to 700μm, set the number of layers to 8 layers, select a needle with a diameter of 210μm, set the extrusion pressure to 60psi, and the printing speed to 10mm / s, and print layer by layer A preformed terahertz wave optical window is obtained.

[0027] 3. The preformed optical window is heat-cured at 80° C. for 2 hours to obtain a terahertz wave optical window with a dielectric rod diameter of 210 μm, a pitch of 700 μm, and a number of layers of 8 layers. The structure of the optical window is a three-dimensional wood pile structure, and its optical picture and scanning electron microscope picture are as follows: figure 1 .

[0028] 4. Perform terah...

Embodiment 2

[0031] 1. Prepare a slurry with a vanadium dioxide content of 50wt.% according to step 1 in Example 1, and put the slurry into a 10mL barrel for printing.

[0032] 2. Write the 3D printing program of the wood pile structure, set the distance between the medium rods to 600μm, set the number of layers to 8 layers, select a needle with a diameter of 210μm, set the extrusion pressure to 60psi, and the printing speed to 10mm / s, and print layer by layer A preformed terahertz wave optical window is obtained.

[0033] 3. The thermal field-tunable terahertz wave optical window with a dielectric rod diameter of 210 μm, a spacing of 600 μm, and a number of layers of 8 layers was obtained by heat-curing the preformed optical window at 80° C. for 2 hours.

[0034] 4. Perform terahertz time-domain spectroscopy tests on the optical window at 25°C and 75°C respectively, and obtain its photonic bandgap diagram after fast Fourier transform, as shown in image 3 .

[0035] At room temperature ...

Embodiment 3

[0037] 1. Prepare a slurry with a vanadium dioxide content of 50wt.% according to step 1 in Example 1, and put the slurry into a 10mL barrel for printing.

[0038]2. Write the 3D printing program of the wood pile structure, set the distance between the medium rods to 600μm, set the number of layers to 4 layers, select a needle with a diameter of 210μm, set the extrusion pressure to 60psi, and the printing speed to 10mm / s, and print layer by layer A preformed terahertz wave optical window is obtained.

[0039] 3. The thermal field-tunable terahertz wave optical window with a dielectric rod diameter of 210 μm, a spacing of 600 μm, and a number of layers of 4 layers was obtained by heat-curing the preformed optical window at 80° C. for 2 hours.

[0040] 4. Perform terahertz time-domain spectroscopy tests on the optical window at 25°C and 75°C respectively, and obtain its photonic bandgap diagram after fast Fourier transform, as shown in Figure 4 .

[0041] At room temperature ...

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Abstract

The invention discloses a terahertz wave optical window with adjustable thermal field, a preparation method and application thereof, and belongs to the technical field of 3D printing and terahertz wave application. The paste with thermochromic properties is directly prepared by 3D printing moldless direct writing technology to obtain a terahertz wave optical window with a three-dimensional spatial structure. The terahertz wave optical window can realize the selective transmission of different wavelength terahertz waves under the control of the thermal field, which solves the defect that the traditional optical window cannot respond to the external environment in real time. In particular, the terahertz wave optical window It can also be used as a thermal sensor to realize the early warning and sensing functions of temperature changes.

Description

technical field [0001] The invention relates to the technical field of 3D printing and terahertz wave application, in particular to a terahertz wave optical window with adjustable thermal field and its preparation method and application. Background technique [0002] Terahertz wave refers to the frequency between 0.1-10THz (1THz=10 12 Hz) electromagnetic wave, its wavelength range is 3mm-30μm. In recent years, with the development of ultrafast optics, terahertz technology and applications have made significant progress. The characteristics of terahertz waves, such as high transparency, transient, low energy, coherence and fingerprint spectrum, make terahertz technology have great application potential in the fields of wireless communication, biomedical imaging, nondestructive testing, material identification and national defense industry. . Terahertz wave optical window refers to an optoelectronic device that can produce an optical response to terahertz waves, and can reg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/01G02F1/00
CPCB33Y10/00B33Y70/00B33Y80/00G02F1/009G02F1/01
Inventor 李琦杨炜沂王荣朱朋飞鞠小晶
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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