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An infrared narrowband radiator

A narrow-band radiation and radiator technology, applied in the field of photo-thermal-electric energy conversion, can solve the problems of low radiation power spectral density and poor radiation directionality, and achieve simple preparation methods, low cost, and improved radiation power spectral density and radiation the directional effect of

Active Publication Date: 2020-12-11
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For any thermal radiator, its far-field radiation power spectral density cannot exceed that of a black body at the same temperature, so it has the disadvantage of low radiation power spectral density; in addition, because it is difficult to achieve particle number inversion by simple heating, the thermal radiator only has a resonator Without gain medium, its spectral power spectrum is relatively broad, and the directivity of radiation is relatively poor

Method used

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  • An infrared narrowband radiator
  • An infrared narrowband radiator
  • An infrared narrowband radiator

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Effect test

Embodiment 1

[0038] figure 1A schematic structural diagram of an infrared radiator narrowband embodiment of the invention.

[0039] See figure 1 Infrared radiation narrowband embodiment of the present embodiment, the narrow band infrared radiator includes a lower substrate 1 are sequentially grown on the pump light source 2, a first infrared resonator 3, 4 gain medium and the second infrared IR resonant cavity 5; said narrow band infrared radiation for generating a predetermined frequency v IR Long-wave infrared radiation in a narrow band.

[0040] The infrared frequency v 4 gain medium for absorbing the pump light source 2 emits the pump light, to produce a long-wave infrared light, said pump light pump Said predetermined frequency v IR V meet pump > 2v IR ; The gain medium infrared band gap is equal to 4 in the long wavelength infrared energy, the energy E of the long-wave infrared light g = Hv IR , H represents Planck's constant; IR same structure as the first resonator 3 and the second in...

Embodiment 2

[0054] figure 2 An infrared schematic structural diagram of a narrow band radiator 2 embodiment of the invention.

[0055] See figure 2 Infrared radiation narrowband embodiment of the present embodiment, the narrow band infrared radiator includes a lower substrate 1 are sequentially grown on the pump light source 2 and the gain medium doped with an infrared infrared resonator 6; the narrow band of infrared radiation for generating a predetermined frequency v IR Long-wave infrared radiation in a narrow band.

[0056] The infrared doped gain medium infrared cavity 6 by a resonance unit of the N-doped gain medium infrared sequentially stacked from the bottom to form wherein N ≧ 2; said gain medium doped with infrared infrared resonance the pump chamber 6 for absorbing pump light emitted from the light source to generate the long-wave infrared light, and the long-wave infrared light resonance frequency selection, to produce a predetermined frequency v IR Long-wave infrared radiation ...

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Abstract

The present invention discloses an infrared narrow band radiator. The infrared narrow band radiator can produce medium and long wave infrared narrow band radiation with a preset frequency V<IR>. The infrared narrow band radiator comprises a substrate, a pumping light source, a first infrared resonant cavity, an infrared gain medium and a second infrared resonant cavity successively grown from bottom to top; or comprises the substrate, the pumping light source and a infrared resonant cavity doped with the infrared gain medium successively grown from bottom to top. The forbidden bandwidth of theinfrared gain medium is equal to the energy of the required medium and long wave infrared light. The infrared gain medium absorbs the pumping light emitted by the pumping light source and produces thermal carrier(s). Photo-induced thermal carrier(s) produce multiple electron-hole pairs by relaxing to the energy band edge of the infrared gain medium, the multiple electron-hole pairs provide gain for the medium and long wave infrared light with the frequency V<IR> via radiation recombination, and the frequency of the pumping light V<pump> >2 V<IR>. According to the radiator, without the condition of single crystal epitaxial growth of the medium and long wave infrared gain medium, the radiation power spectral density and the directivity are improved.

Description

Technical field [0001] The present invention relates to a light - heat - electricity energy conversion technologies, and more particularly to a narrow band infrared radiator. Background technique [0002] Long-wave infrared light source has a very wide range of applications in gas detection, detection of a biological target, and many other fields. In gas detection, for example, many gas molecules in the long-wave infrared characteristic absorption peaks called fingerprint region. The emission wavelength of infrared light by the infrared light source, such molecules, if present, the infrared light is absorbed, attenuated signal, by detecting the infrared signal corresponding to the detected intensity to the molecule exists and that its size relative concentration. Different gas molecules have different areas of the fingerprint, the fingerprint which coverage area a few nanometers to several tens of nanometers range, the center wavelength range is also different, so for the long-wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/06H01S5/04H01S5/323
CPCH01S5/041H01S5/06H01S5/32308
Inventor 王健罗毅欧春晖郝智彪
Owner TSINGHUA UNIV