Multichannel mid-infrared optical filter based on phase change material

A phase-change material and infrared optics technology, applied in the field of mid-infrared optical filters, can solve the problems of high cost and long time consumption, and achieve the effects of low manufacturing cost, high efficiency and improved spectral selectivity

Pending Publication Date: 2022-07-12
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical applications, remanufacturing new structures has the disadvantages of high cost and time-consuming

Method used

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  • Multichannel mid-infrared optical filter based on phase change material
  • Multichannel mid-infrared optical filter based on phase change material
  • Multichannel mid-infrared optical filter based on phase change material

Examples

Experimental program
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Effect test

Embodiment 2

[0041] Example 2, on the basis of Example 1, the number of alternately distributed layers of Ge layer 7 and ZnS layer 8 in the upper layer one-dimensional photonic crystal 1, the middle layer one-dimensional photonic crystal 3 and the lower layer one-dimensional photonic crystal 5 was changed, such as figure 1 As shown, the upper layer one-dimensional photonic crystal 1 has a total of 6 layers, which are Ge layer 7, ZnS layer 8, Ge layer 7, ZnS layer 8, Ge layer 7 and ZnS layer 8 from top to bottom along the optical path direction; The one-dimensional photonic crystal 3 has a total of 5 layers, which are ZnS layer 8, Ge layer 7, ZnS layer 8, Ge layer 7 and ZnS layer 8 from top to bottom along the optical path direction; the lower one-dimensional photonic crystal 5 has a total of 6 layers, along the optical path direction From top to bottom are ZnS layer 8 , Ge layer 7 , ZnS layer 8 , Ge layer 7 , ZnS layer 8 and Ge layer 7 . When the phase change material Ge in the upper one-d...

Embodiment 4

[0044] In Embodiment 4, on the basis of Embodiment 1, four photonic crystal layers are provided on the base 6, and grating layers are provided between adjacent photonic crystal layers, and the grating layers have three layers in total. The number of channels of the filter in Embodiment 3 is 6.

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Abstract

The invention provides a multi-channel mid-infrared optical filter based on a phase change material, which comprises photonic crystal layers and grating layers, at least two photonic crystal layers are arranged on a substrate, and the grating layers are arranged between the adjacent photonic crystal layers; the photonic crystal layer is composed of Ge layers and ZnS layers which are alternately distributed in the light path direction. The grating layer is formed by periodically distributing a plurality of phase-change material layers at intervals along the direction vertical to a light path, and a gap is formed between every two adjacent phase-change material layers; the phase-change material layer is converted from an amorphous state to a crystalline state, so that the spectrum transmission characteristic is regulated and controlled. According to the invention, a multi-channel ultra-narrow band perfect transmission peak can be generated in a mid-infrared band range, and a multi-channel mid-infrared optical filter is formed.

Description

technical field [0001] The invention relates to the field of mid-infrared optical filters, in particular to a multi-channel mid-infrared optical filter based on phase change materials. Background technique [0002] The realization of high-efficiency and ultra-narrow-band optical filters is essential in basic research and optical device applications. Optical filters are widely used in NDIR gas sensors, spectrometers, digital cameras, video phones, and other fields. Much work has been done in the field of realizing mid-infrared optical filters using modes such as Fabry-Perot resonance, electric dipole resonance or magnetic dipole resonance, continuum and bound states. Most of the previous optical filtering micro-nano structures require complex sub-wavelength-scale structure design or the introduction of two-dimensional materials, which will inevitably bring processing difficulties and greatly increase the manufacturing cost. In addition, compared with single-channel optical f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/00G02F1/01
CPCG02F1/0009G02F1/0063G02F1/01
Inventor 周昆仲晓星秦波涛孙希贤
Owner CHINA UNIV OF MINING & TECH
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