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Terahertz wave polarizing beam splitter

A polarizing beam splitter and terahertz technology, applied in polarizing components, instruments, optics, etc., can solve problems such as difficult manufacturing process, low transmittance, and complex structure, and achieve simple structure, high transmittance, and high beam splitting rate Effect

Inactive Publication Date: 2012-02-15
CHINA JILIANG UNIV
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AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages of relatively low transmittance, complex structure, difficult actual manufacturing process and high cost in the prior art, the present invention provides a terahertz wave polarization beam splitter with high beam splitting rate

Method used

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  • Terahertz wave polarizing beam splitter
  • Terahertz wave polarizing beam splitter
  • Terahertz wave polarizing beam splitter

Examples

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Embodiment 1

[0017] Terahertz wave polarizing beam splitter:

[0018] The first piece of far-infrared optical glass and the second piece of far-infrared optical glass are isosceles right-angled triangles, the refractive index of the far-infrared optical glass is 1.48, and the right-angle side is 20 mm. The refractive index of the first polarizing film is 3.6, the refractive index of the second polarizing film is 2.45, the length of the first polarizing film and the second polarizing film are equal, which is 1.8 μm, and the incident angle of unpolarized light incident on the film polarizer is 45° °. The film polarizer 5 is formed by alternately connecting 10 layers of first polarizing films and 9 layers of second polarizing films, that is, N=19. The TE wave reflectivity curve of the terahertz wave polarizing beam splitter is as follows figure 2 As shown, the maximum reflectance is 99.9%. The TM wave reflectivity curve of the terahertz wave polarizing beam splitter is as follows image ...

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Abstract

The invention discloses a terahertz wave polarization beam splitter. It includes a signal input terminal, a first signal output terminal, a second signal output terminal, a first piece of far-infrared optical glass, a film polarizer, and a second piece of far-infrared optical glass; the film polarizer consists of a first polarizing film and a second polarizing film The first piece of far-infrared optical glass is connected with the film polarizer and the second piece of far-infrared optical glass in sequence. The signal output end is connected with the second signal output end. The first piece of far-infrared optical glass and the second piece of far-infrared optical glass are isosceles right triangles. The refractive index of the first polarizing film is greater than that of the second polarizing film, and the lengths of the first polarizing film and the second polarizing film are equal. The incident angle of the unpolarized terahertz wave to the thin-film polarizer is 45°. The invention has the advantages of simple structure, high beam splitting rate, small size, low cost and convenient manufacture.

Description

technical field [0001] The invention relates to a beam splitter, in particular to a terahertz wave polarization beam splitter. Background technique [0002] Terahertz technology is a new technology developed in the late 1980s. The unique frequency range of terahertz waves (located between the microwave frequency band and the optical frequency band) covers the molecular vibration and rotation spectra of most macromolecular substances, so most macromolecular substances in the terahertz frequency band regardless of their absorption, reflection or emission spectra have Obvious fingerprint characteristics, which is not available in microwave. Compared with traditional light sources, terahertz pulsed light sources have many unique properties, such as: transient, broadband, coherent, low-energy, etc. In addition, terahertz waves can penetrate most substances to varying degrees, which is not available for infrared radiation. These characteristics determine the value of terahertz ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/28G02B5/30
Inventor 李九生赵晓丽
Owner CHINA JILIANG UNIV
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