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Terahertz wave polarization beam splitter with polygonal liquid crystal pool structure

A polarizing beam splitter and polygon technology, which is applied to the coupling of optical waveguides and other directions, can solve the problems of difficult manufacturing process, low beam splitting efficiency and complex structure, and achieve the effects of simple structure, high beam splitting rate and small size.

Inactive Publication Date: 2013-02-13
CHINA JILIANG UNIV
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Problems solved by technology

[0004] In order to overcome the disadvantages of low beam splitting efficiency, complex structure, difficult actual manufacturing process and high cost in the prior art, the present invention provides a terahertz wave polarizing beam splitter with a polygonal liquid crystal cell structure with a high beam splitting rate

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  • Terahertz wave polarization beam splitter with polygonal liquid crystal pool structure
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  • Terahertz wave polarization beam splitter with polygonal liquid crystal pool structure

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Embodiment 1

[0016] Terahertz wave polarization beam splitter with polygonal liquid crystal cell structure:

[0017] The material of the substrate is silica, the length of the substrate is 3000 μm, the width is 1500 μm, and the height is 1000 μm. The thickness of the rectangular silicon waveguide is 500 μm, the width is 450 μm, and the length is 1200 μm. The closed polygonal silicon frame has a regular 12-sided structure with a side length of 600 μm, a thickness of 500 μm, and a frame width of 50 μm. The distance between the rectangular silicon waveguide and the closed polygonal silicon frame is 30 μm. The transmission curve of TE wave and TM wave output by the first signal output terminal is as follows: image 3 As shown, the maximum transmission rate of TM wave is 0.12%, and the minimum transmission rate of TE wave is 99.1%. The transmission rate curve of TM wave and TE wave output by the second signal output terminal is as follows: Figure 4 As shown, the minimum transmission rate of TM ...

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Abstract

The invention discloses a terahertz wave polarization beam splitter with polygonal liquid crystal pool structure. The beam splitter comprises a signal input end, a first signal output end, a second signal output end, a substrate, rectangular silicon waveguides, a closed polygonal silicon frame and liquid crystals, wherein the two rectangular silicon waveguides are arranged on the substrate in a centrosymmetric manner; the substrate is made of silica materials; the closed polygonal silicon frame is arranged between the two rectangular silicon waveguides; the liquid crystals are filled in the closed polygonal silicon frame; the signals are subjected to vertical incidence from the signal input end; and through coupling between the rectangular silicon waveguides and the liquid crystals, TE (transverse electric) waves are directly output from the first signal output end while TM (transverse magnetic) waves are output from the second signal output end. The beam splitter has the advantages of simple structure, high beam splitting rate, small dimension, low cost, convenience in preparation and the like.

Description

technical field [0001] The invention relates to a beam splitter, in particular to a terahertz wave polarizing beam splitter with a polygonal liquid crystal pool structure. Background technique [0002] Terahertz (THz) waves generally refer to electromagnetic radiation with a frequency in the range of 0.1THz to 10THz (wavelength in the range of 3mm to 30μm). From the perspective of frequency, this band is located between millimeter waves and infrared rays, and belongs to the far-infrared band; from the perspective of energy, this band is located between electrons and photons. In the electromagnetic spectrum, the infrared and microwave technologies on both sides of the terahertz band are very mature, but the terahertz technology is basically "blank". , is not completely suitable for microwave theory to study, thus forming what scientists usually call "terahertz gap". The terahertz wave band is located at the junction of electronics and photonics, and it is difficult to gener...

Claims

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Application Information

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