Terahertz wave polarization beam splitter of double serial connection ring structure
A polarization beam splitter, terahertz technology, applied in the field of terahertz beam splitter, can solve the problems of difficult integration, low beam splitting efficiency, large volume, etc., and achieves a small footprint, high beam splitting efficiency, and easy integration. Effect
Inactive Publication Date: 2014-07-02
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 efficiency, complex structure, large volume, difficult actual manufacturing process, and difficult integration in the prior art, and provide a simple structure and high beam splitting rate double-connected circular ring structure. Hertzian polarizing beam splitter
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Embodiment 1
[0017] Terahertz wave polarizing beam splitter with double-connected ring structure:
[0018] The material of the substrate is silicon dioxide, the length is 2200 μm, the width is 1800 μm, and the thickness is 400 μm; the material of the waveguide is silicon, the refractive index is 3.42, and the thickness of the waveguide is 40 μm. The lengths of the first straight waveguide and the second straight waveguide are 2200 μm and 2000 μm respectively; the widths of the first straight waveguide and the second straight waveguide are both 80 μm. The width of the circular ring waveguide is 80 μm, and the outer circle radius of the circular ring waveguide is 300 μm. The size of the left half of the rhombus waveguide is the same as that of the right half of the rhombus waveguide; the size of the right half of the rhombus waveguide is the same as that of the left half of the rhombus waveguide; the length of the rhombus waveguide is 600 μm, and the width is 200 μm. The distance between th...
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The invention discloses a terahertz wave polarization beam splitter with a double-connected ring structure. It includes a signal input terminal, a first signal output terminal, a second signal output terminal, a substrate, a first straight waveguide, a second straight waveguide, a first series circular ring waveguide, a second series circular ring waveguide, a series connection Rhombus-shaped waveguide; between the first straight waveguide and the second straight waveguide, a first series-connected circular ring-shaped waveguide, a series-connected diamond-shaped waveguide and a second series-connected circular ring-shaped waveguide are sequentially arranged, and the terahertz wave signal is input from the signal input end, The TE wave is directly output from the first signal output terminal through the first straight waveguide, and through the coupling between the first series-connected circular ring waveguide, the series-connected diamond-shaped waveguide, and the second series-connected circular ring-shaped waveguide, the TM wave passes through the second The straight waveguide is output from the second signal output end. The invention has the advantages of simple structure, small occupied space, easy integration, high beam splitting efficiency, etc., and can well meet the needs of the fields of terahertz medical imaging, terahertz communication and the like.
Description
technical field [0001] The invention relates to a terahertz wave beam splitter, in particular to a terahertz wave polarization beam splitter with a double-connected ring structure. Background technique [0002] Terahertz wave (THz, 1THz=10 12 Hz) usually refers to electromagnetic waves with a frequency in the range of 0.1THz-10THz, which is between far-infrared light waves and microwaves on the electromagnetic spectrum. Compared with electromagnetic waves in other frequency bands, terahertz waves have their unique advantages: the cosmic background radiation, many organic macromolecules, especially the rotational energy levels and vibrational energy levels of biological macromolecules are located in the terahertz wave band. Due to the advantages of transient, broadband, coherence, and low energy, ultrafast terahertz pulses have shown good application prospects in imaging, nondestructive detection, security inspection, and physical and chemical analysis. Therefore, compact, ...
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IPC IPC(8): G02B6/126
Inventor 李九生
Owner CHINA JILIANG UNIV