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Y-shaped porous hollowed slab terahertz wave polarizing beam splitter

A polarization beam splitter and terahertz technology, applied in the coupling direction of optical waveguide, can solve the problems of low transmittance, complex structure and difficult manufacture of polarization beam splitting, and achieve small size, high beam splitting rate and low cost Effect

Inactive Publication Date: 2012-05-30
CHINA JILIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages of low transmittance, complex structure, difficult actual manufacture 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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  • Y-shaped porous hollowed slab terahertz wave polarizing beam splitter
  • Y-shaped porous hollowed slab terahertz wave polarizing beam splitter
  • Y-shaped porous hollowed slab terahertz wave polarizing beam splitter

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Embodiment 1

[0019] The hole spacing a of the Y-shaped hole-shaped flat plate terahertz wave polarizing beam splitter is 40 μm, the coupling spacing d is 24 μm, the radius R of the large-hole hollow 5 is 9 μm, and the radius r of the small-hole hollow 6 is 7.2 μm. The material of the flat polarizer 4 is gallium arsenide material with a refractive index of 3.25. The coupling length L is 60 μm, and the adjacent hole-shaped hollows arranged in a curved line are bent in the transmission direction where the first signal output terminal 2 is located, and the bending angle θ thereof is 90 degrees. The TE wave and TM wave transmittance curves of the first signal output end 2 of the Y-shaped hollow plate terahertz wave polarization beam splitter are as follows: Image 6 As shown, the maximum transmittance of TE wave in the 0.2~1.0THz frequency band is 98%, and the minimum transmittance of TM wave is 2%. The TM wave and TE wave transmittance curves of the second signal output end 3 of the Y-shaped ...

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Abstract

The invention discloses a Y-shaped porous hollowed slab terahertz wave polarizing beam splitter. A porous hollowed coupling region consists of a second linear porous hollowed region and a third linear porous hollowed region; the third linear porous hollowed region is connected with a fourth linear porous hollowed region to form a linear porous hollowed region; a first linear porous hollowed region is formed by linearly arranging a plurality of large-hole hollows and a plurality of small-hole hollows at equal intervals; an S-shaped curve porous hollowed region is formed by arranging a plurality of small-hole hollows at equal intervals in S shape; the first linear porous hollowed region, the second linear porous hollowed region and the S-shaped curve porous hollowed region are sequentially connected with one another to form a curve porous hollowed region; and the Y-shaped porous hollowed region comprises a linear porous hollowed region and a curve porous hollowed region. The Y-shaped porous hollowed slab terahertz wave polarizing beam splitter has the advantages of simple structure, high beam splitting rate, small dimension, low cost, convenience in preparation and the like, and canmeet the requirements on the application in the fields such as terahertz wave imaging, medical diagnosis, terahertz wave communication, and the like.

Description

technical field [0001] The invention relates to a beam splitter, in particular to a Y-shaped hollow plate terahertz wave polarization beam splitter. Background technique [0002] Terahertz (THz for short) waves refer to electromagnetic waves with a frequency in the range of 0.1THz to 10THz. It is in the field of transition from electronics to photonics and integrates the advantages of microwave communication and optical communication: The bandwidth is much larger than that of microwave communication, which can effectively solve the increasingly serious problem of shortage of frequency band resources. In addition, terahertz waves have good penetrability. It can penetrate smoke, walls, carbon plates, cloth, ceramics and other substances with very small attenuation, which solves the limitations of optical communication in harsh environments such as smoke and dust. The transmission characteristics of terahertz waves determine that terahertz waves can be applied to wireless comm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/27
Inventor 李九生张宝月
Owner CHINA JILIANG UNIV
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