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Double-stepped terahertz wave polarization beam splitter

A polarizing beam splitter and stepped technology, applied in the field of terahertz beam splitters, can solve the problems of difficult actual production process, complex structure, low beam splitting rate, etc., and achieve compact structure, high beam splitting rate and small size. Effect

Inactive Publication Date: 2013-04-03
CHINA JILIANG UNIV
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AI Technical Summary

Problems solved by technology

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

Method used

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  • Double-stepped terahertz wave polarization beam splitter

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Embodiment 1

[0016] Double-step terahertz wave polarizing beam splitter:

[0017] The material of the substrate is silicon dioxide, the length is 1270 μm, the width is 1000 μm, and the thickness is 400 μm. The materials of the first stepped waveguide, the second stepped waveguide and the elliptical waveguide are all silicon, and the thickness is 80 μm. The lengths of the first stepped waveguide and the second stepped waveguide are 1270 μm and 920 μm respectively, and the widths are both 300 μm. The distance between two adjacent elliptical waveguides of the elliptical waveguide array is 60 μm; the major axis length of the elliptical waveguide is 160 μm, and the minor axis length is 50 μm. The length of the large rectangular groove is 200 μm and the width is 30 μm; the length of the upper base of the first isosceles trapezoidal groove is 170 μm, the length of the lower base is 190 μm, and the height is 30 μm; the length of the upper base of the second isosceles trapezoidal groove is 140 μm ...

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Abstract

The invention discloses a double-stepped terahertz wave polarization beam splitter which comprises a signal input end, a first signal output end, a second signal output end, a matrix, a first stepped waveguide, a second stepped waveguide and an elliptical waveguide array. The first stepped waveguide, the second stepped waveguide and the elliptical waveguide array are disposed on the matrix. A hertz wave is input from the signal input end, a TE (transverse electric) wave is output directly from the first signal output end, a TM (transverse magnetic) wave is output from the second signal output end by the aid of coupling of the elliptical waveguide array, and accordingly the function of polarization beam splitting is achieved. The double-stepped terahertz wave polarization beam splitter is compact in structure, small in size, high in beam splitting efficiency, convenient to manufacture, easy to integrate and the like, and the application requirements for fields such as terahertz medical imaging and terahertz communication can be satisfied.

Description

technical field [0001] The invention relates to a terahertz wave beam splitter, in particular to a double-stepped terahertz wave polarization beam splitter. Background technique [0002] Terahertz waves are electromagnetic waves between microwaves and far-infrared rays (frequency 0.1~10THz). Before the 1980s, due to the lack of effective terahertz sources and sensitive detection methods, researchers could not deeply understand the nature of electromagnetic waves in this frequency band. a spectral interval. In the past ten years, the rapid development of ultrafast laser technology has provided a stable and reliable source for the generation of terahertz pulses, and the research on terahertz detection technology and its applications has also been vigorously developed. In modern research, terahertz systems are widely used in the fields of semiconductor materials, high-temperature superconducting material properties research, tomographic imaging technology, label-free genetic ...

Claims

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Application Information

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