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Track-shaped structure terahertz wave polarization beam splitter

A polarizing beam splitter, racetrack-shaped technology, applied in the direction of instruments, light guides, optics, etc., can solve the problems of difficult manufacturing process, low beam splitting rate, complex structure, etc., and achieve simple and compact structure, high beam splitting rate, and easy integration Effect

Inactive Publication Date: 2014-01-29
CHINA JILIANG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of low beam splitting rate, complex structure, difficult actual manufacturing process and difficult integration in the prior art, and provide a racetrack-shaped terahertz wave polarization beam splitter with simple structure and high beam splitting rate device

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Embodiment 1

[0017] Terahertz wave polarizing beam splitter with racetrack structure:

[0018] The material of the substrate is silicon dioxide, the length is 2900 μm, the width is 1880 μm, and the thickness is 400 μm. The material of the waveguide is silicon, the width is 80 μm, and the thickness is 40 μm. The length of the upper longitudinal waveguide of the left n-shaped waveguide is 500 μm, the outer radius r1 of the upper quarter arc waveguide is 120 μm, the length of the upper transverse waveguide is 300 μm, and the outer radius r2 of the semi-circular waveguide is 400 μm . The distance between the middle coupling region and the left n-shaped waveguide and the right helical waveguide is 20 μm; the distance between the two longitudinally arranged racetrack-shaped structures in the middle coupling region is 10 μm, and the distance between the upper and lower laterally arranged racetrack-shaped structures is 20 μm. The distance between the structure and the two longitudinally aligned ...

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Abstract

The invention discloses a track-shaped structure terahertz wave polarization beam splitter which comprises a terahertz wave input end, a first signal output end, a second signal output end, a base, a left side n-shaped waveguide, an intermediate coupling area and a right side spiral waveguide. The left side n-shaped waveguide, the intermediate coupling area and the right spiral waveguide are arranged on the base body. The left side n-shaped waveguide is of a longitudinal symmetry structure, the intermediate coupling area is composed of four longitudinal-symmetry and bilateral-symmetry track-shaped structures, terahertz wave can be input from the terahertz wave input end, transverse magnetic (TM) wave is directly output from the first signal output end through the left side n-shaped waveguide, and the transverse electrical (TE) wave can be output from the second signal output end to obtain the polarization beam splitting function through the coupling function of the intermediate coupling area. The track-shaped structure terahertz wave polarization beam splitter has the advantages of being simple and compact in structure, small in size, high in beam splitting rate, convenient to manufacture, easy to integrate and the like, and meeting requirements of fields of medical detection, non-destructive detection, terahertz wave imaging and the like.

Description

technical field [0001] The invention relates to a beam splitter, in particular to a terahertz wave polarization beam splitter with a racetrack structure. Background technique [0002] With the rapid development of modern science and technology, the intensification of international competition and the continuous acceleration of social informationization, a variety of new technologies and new ideas have emerged in large numbers, and terahertz wave technology is one of them. Terahertz (THz) generally refers to electromagnetic waves with frequencies ranging from 0.1 THz to 10 THz. Its long-wave band coincides with millimeter wave (sub-millimeter wave), and its development mainly relies on electronics technology; while its short-wave band coincides with infrared rays, its development mainly relies on photonics technology. It can be seen that terahertz wave is the direction of macro electronics. The transition frequency band of microphotonics occupies a very special position in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/126
Inventor 李九生
Owner CHINA JILIANG UNIV
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