Broadband spatial coherence thermal radiation light source

A thermal radiation light source and wide-band technology, applied in the field of thermal radiation light sources, can solve problems such as inability to achieve coherent thermal radiation, achieve effective control of local density of states, enhance local electromagnetic field strength, and simple production

Active Publication Date: 2011-11-09
TONGJI UNIV
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Problems solved by technology

However, the plasma oscillation frequency of metal materials existing in nature is in the ultraviolet and visible light bands, and the plasma o

Method used

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  • Broadband spatial coherence thermal radiation light source
  • Broadband spatial coherence thermal radiation light source
  • Broadband spatial coherence thermal radiation light source

Examples

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[0024] Example:

[0025] The embodiment of the present invention is a heat radiation plate structure designed at 30-60THz. The schematic diagram of the structure is shown in FIG. 1 , wherein the upper surface metal structure layer 1 adopts a one-dimensional metal grating structure arranged periodically, and is formed by photolithography of an aluminum film with a thickness of 0.2 μm. The width of the metal strips is 4 microns, and the spacing between the metal strips and the metal strips is 0.2 microns. The uniform dielectric layer 2 is made of doped silicon oxide material. Pure silicon oxide has low dielectric constant, small light absorption, and low thermal radiation efficiency; doping with 1% carbon powder can increase its electrical conductivity while keeping its dielectric constant unchanged. The conductivity of silicon material is 67s / m. The lower bottom plate is a metal layer 3, which generates a magnetic resonance surface coherence state with the upper surface meta...

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Abstract

The invention relates to a broadband spatial coherence thermal radiation light source, comprising a metal structure layer, a medium layer and a lower base plate metal layer, wherein the lower base plate metal layer is a supporting layer and a thermal conductive layer, and the medium layer and the planar metal structure layer are sequentially overlapped on the lower base plate metal layer from down to up. The metal structure layer is composed of one-dimensional or two-dimensional arrays arranged in a metal unit period, a low-leakage coherent magnetic resonance surface state formed by the metalstructure layer, the medium layer and the lower base plate metal layer in the invention controls coherence of thermal radiation, and the frequency can be adjusted by cycle length. And the coherent magnetic resonance surface state in the invention is leaked to a free space by virtue of a metal slot on the upper surface, thus the ratio of width of the metal slot to a period determines coherence length. The broadband spatial coherence thermal radiation light source provided by the invention has simple structure and low cost, is convenient to manufacture and is easy to realize.

Description

technical field [0001] The invention relates to a thermal radiation light source with high spatial coherence for terahertz and infrared frequency band. Background technique [0002] The spontaneous radiation produced by the material due to the thermal motion of molecules or atoms is called thermal radiation, and its radiation spectrum is related to the nature and temperature of the material. All objects are constantly radiating heat, and the most common application of heat radiation is incandescent lamps. Compared with laser monochromaticity and high directivity, it is generally believed that thermal radiation is an incoherent heat source in time and space, and the radiation spectrum is quite broadband, and the radiation in all directions is isotropic. The light source generally used in spectral analysis is monochromatic light, and infrared laser light source can produce coherent monochromatic light, but its cost is expensive, and the frequency is generally not tunable. Th...

Claims

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Application Information

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IPC IPC(8): H01K5/00
Inventor 魏泽勇李宏强曹扬武超樊元成余兴韩缙张冶文陈鸿
Owner TONGJI UNIV
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