A photonic crystal filter for miniature thermo-optical systems

A photonic crystal and filter technology, applied in the field of spectrum control, can solve the problem that the reflection band of the filter is not wide enough

Inactive Publication Date: 2016-08-31
JIANGSU UNIV
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  • Claims
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Problems solved by technology

[0008] According to the method of transmission matrix and the design theory of optical thin film, the present invention designs a new type of one-dimensional Si / SiO 2 Photonic crystal filter to solve the problem that the existing filter reflection band is not wide enough

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  • A photonic crystal filter for miniature thermo-optical systems
  • A photonic crystal filter for miniature thermo-optical systems
  • A photonic crystal filter for miniature thermo-optical systems

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Embodiment Construction

[0024] The specific implementation manner of the present invention will be further described below in conjunction with accompanying drawings 2-5.

[0025] Such as image 3 As shown, the described one-dimensional Si / SiO 2 Photonic crystal filter, composed of two Si / SiO with the center wavelengths of the primary band gap of 2.34 μm and 3.0 μm respectively 2 It is composed of multi-layer superimposed thin films, and the basic structure of the two multi-layer films is (L / 2HL / 2) 5 , after correction and optimization, superimpose them, and the final structure is [1.10(L / 2HL / 2)](L / 2HL / 2)3[1.10(L / 2HL / 2)][0.95(L / 2HL / 2) ](L / 2HL / 2) 3 [0.95(L / 2HL / 2)]. The photonic crystal filter with a new structure has a total of 10 units. Considering that the connected layers between different units are actually the same material, the actual filter has a total of 21 layers, of which 3-1, 3-3, 3-5, 3-7 , 3-9, 3-11, 3-13, 3-15, 3-17, 3-19, 3-21 are SiO 2 Layers, 3-2, 3-4, 3-6, 3-8, 3-10, 3-12, 3-14,...

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Abstract

The invention discloses a photonic crystal filter of a novel structure, and especially to a one-dimensional periodicity Si / SiO2 photonic crystal filter for a miniaturized thermophotovoltaic system. The filter is formed by combining two Si / SiO2multilayer alternative superposing films with first-order forbidden band center wavelengths respectively being 2.34 [mu]m and 3.0 [mu]m. There are ten period units and 21 layers. The superposing structure is [1.10(L / 2HL / 2)](L / 2HL / 2)[3][1.10(L / 2HL / 2)][0.95(L / 2HL / 2)](L / 2HL / 2)[3][0.95(L / 2HL / 2)]. The width of a reflection band is expanded so that the filter can be quite well adaptive to a miniaturized thermophotovoltaic system using a GaSb photocell, more radiation incapable of photoelectric conversion can be reflected back to a radiation wall surface, and the working performance of the battery can be improved through better alleviation of the cooling load of the photocell, thus the system electric energy output is bound to be increased.

Description

technical field [0001] The invention belongs to the technical field of spectrum control, in particular to a one-dimensional Si / SiO used in a micro thermoelectric system 2 Photonic crystal filter. Background technique [0002] In recent years, with the rapid development of MEMS technology, its energy supply part, that is, the micro power device has become one of the hot spots of research. At present, the vast majority of micro power devices are based on the combustion of hydrocarbon fuels, so this type of device not only has a very high energy density, but also has a series of advantages, such as abundant sources, portability, long life, and little damage to the environment. Therefore, in addition to being used as a power source for MEMS, it can also provide necessary electric energy or power for portable electronic devices, wireless communication equipment, spacecraft, and soldiers to fight, and the market prospect is very broad. [0003] Micro-thermophotovoltaic System (M...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/20H01L31/054H01L31/0216
CPCY02E10/52
Inventor 唐爱坤
Owner JIANGSU UNIV
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