Surface-plasma-based infrared photon absorption device of composite resonator

A technology of surface plasmon and infrared light, which is applied in the measurement of scattering characteristics, etc., can solve the problems of narrow working band and small absorption rate, and achieve the effect of enhancing the absorption rate

Inactive Publication Date: 2013-09-18
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem that the infrared photon absorption device in the prior art has a small absorpt...

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  • Surface-plasma-based infrared photon absorption device of composite resonator
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  • Surface-plasma-based infrared photon absorption device of composite resonator

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] Such as figure 1 As shown, the composite resonant cavity infrared photon absorption device based on surface plasmon of the present invention is made up of three layers of films on the substrate 1, and from bottom to top are: reflective layer 2, medium layer 3 and metal layer 4; reflective layer The thickness of 2 is more than 100nm, the reflective layer 2 has a thickness greater than 100nm, and its reflection effect does not increase significantly, but the production cost is relatively high. Considering its effect and cost, the preferred thickness is 100nm, and the material of the reflective layer 2 is high in the infrared band. Reflective metal thin film, such as gold, silver or aluminum, the reflective layer 2 is grown on the substrate 1 by vacuum coating method; the thickness of the dielectric layer 3 depends on the wavelength band used by the infra...

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Abstract

The invention discloses a surface-plasma-based infrared photon absorption device of a composite resonator, belongs to the technical field of infrared photon absorption, and solves the technical problems of small absorptivity and narrow work wavebands of the infrared photon absorption device at an infrared waveband in the prior art. The infrared photon absorption device disclosed by the invention comprises a reflecting layer, a medium layer, and a metal layer, wherein the medium layer is formed on the reflecting layer; the metal layer is formed on the medium layer; the metal layer is formed by microstructures which are arranged periodically; the dimensions and the cycles of the microstructures are in sub-wavelength scales. The average absorbance of the infrared photon absorption device of the composite resonator, disclosed by the invention, on incident light can be up to 95%; the infrared photon absorption device can work within a relatively wide waveband.

Description

technical field [0001] The invention relates to a compound resonant cavity infrared photon absorption device based on surface plasmon, belonging to the field of infrared photon absorption. Background technique [0002] Uncooled pyroelectric infrared detection systems are widely used in night vision goggles, alarm systems, medical imaging systems, and traffic camera systems. The pyroelectric infrared detector is the core of the uncooled pyroelectric infrared detection system, which has many advantages such as light weight, small size, wide detection band and uncooled. The performance of the pyroelectric infrared detector is mainly characterized by the response speed and sensitivity. If you want the pyroelectric infrared detector to have a higher absorption rate for infrared light, the detector is required to have a good infrared light in a wide range. sensitivity. [0003] In the prior art, infrared photon absorption devices mostly adopt Fabry-Perot cavity structure, that i...

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Application Information

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IPC IPC(8): G01N21/55
Inventor 鱼卫星郝东亮王泰升梁秋群卢振武孙强
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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