CN102928918B - Trapezoid terahertz wave polarization beam splitter - Google Patents
Trapezoid terahertz wave polarization beam splitter Download PDFInfo
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- CN102928918B CN102928918B CN 201210449905 CN201210449905A CN102928918B CN 102928918 B CN102928918 B CN 102928918B CN 201210449905 CN201210449905 CN 201210449905 CN 201210449905 A CN201210449905 A CN 201210449905A CN 102928918 B CN102928918 B CN 102928918B
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Abstract
The invention discloses a trapezoid terahertz wave polarization beam splitter which comprises a signal input end, a first signal output end, a second signal output end, a base, a first straight waveguide, a second straight waveguide, third straight waveguides, fourth straight waveguides, a fifth straight waveguide, a sixth straight waveguide, a seventh straight waveguide, an opening ring and an opening square frame. The right end of the first straight waveguide is connected at the central position of the left side of the second straight waveguide, the fourth straight waveguides are respectively arranged between the upper portion and the lower portion of the right side of the second straight waveguide and between the upper portion and the lower portion of the left side of the fifth straight waveguide, two third straight waveguides are arranged in the middle of the two fourth straight waveguides at equal interval, the sixth straight waveguide and the seventh straight waveguide are symmetrically distributed on the right side of the fifth straight waveguide, the upper portion of the right side of the fifth straight waveguide is connected with the sixth straight waveguide, and the lower portion of the right side of the fifth straight waveguide is connected with the seventh straight waveguide. Terahertz wave is input from the signal input end, transverse electric (TE) wave can be directly output from the first signal output end, and transverse magnetic (TM) wave can be output from the second signal output end to obtain the polarization beam splitting function.
Description
Technical field
The present invention relates to beam splitter, relate in particular to a kind of scalariform terahertz polarization beam splitter.
Background technology
In electromagnetic wave spectrum microwave and infrared between one section radiation be called terahertz emission, its frequency is 0.1 ~ 10THz, wavelength is 30 μ m ~ 3mm.Although just have the people that Terahertz has been produced dense scientific interest in the twenties in last century, but produce and detection method owing to lack effective Terahertz, so very long one period few people make inquiries this wave band of electromagnetic wave spectrum, to such an extent as to form the clear area between far infrared and the submillimeter wave, namely the Terahertz clear area.Recently, have benefited from the development of ultrafast photoelectron technology and low yardstick semiconductor technology, for THz wave provides suitable light source and detection means, the Terahertz Science and Technology has obtained development at full speed.Why THz wave causes the research interest that people are dense, chief reason is the character that it has a lot of uniquenesses: transient state, broadband property, coherence, low energy, fingerprint characteristic, insensitive etc. to blackbody radiation, so that Terahertz has broad application prospects in research fields such as imaging, medical diagnosis, environmental science, information communication, biological chemistries.Under the promotion of application demand, THz wave has made some progress in communication aspects.The research for THz wave both at home and abroad mainly concentrates on THz wave generation and the detection technique, for the also gradually expansion of function element research of THz wave.The function element of THz wave is the Focal point and difficult point during the THz wave science and technology is used.
The THz wave device comprises that mainly THz wave produces and pick-up unit THz wave transmission waveguide, THz wave controller, Terahertz switch, the devices such as THz wave wave filter.Terahertz polarization beam splitter is a kind of very important THz wave device, can be used in the THz wave system realizing the control to THz wave.At present lot of domestic and international scientific research institution all is devoted to the research of terahertz polarization beam splitter and has obtained certain progress, but they often have complex structure, cost is high, volume is large, be difficult to the problem such as making.Therefore be necessary to design a kind of simple in structure, the terahertz polarization beam splitter that size is little, beam splitting efficient is high is used needs to satisfy the following THz wave communication technology.
Summary of the invention
The objective of the invention is in order to overcome the prior art complex structure, actual fabrication process difficulty, the deficiency that cost is higher provides a kind of scalariform terahertz polarization beam splitter of high beam splitting rate.
In order to achieve the above object, technical scheme of the present invention is as follows:
The scalariform terahertz polarization beam splitter comprises signal input part, first signal output terminal, secondary signal output terminal, matrix, the first straight wave guide, the second straight wave guide, the 3rd straight wave guide, the 4th straight wave guide, the 5th straight wave guide, the 6th straight wave guide, the 7th straight wave guide, opening annulus, square opening frame; Matrix is provided with the first straight wave guide, the second straight wave guide, the 3rd straight wave guide, the 4th straight wave guide, the 5th straight wave guide, the 6th straight wave guide, the 7th straight wave guide, opening annulus, square opening frame, the left end of the first straight wave guide links to each other with signal input part, and the right-hand member of the first straight wave guide is connected in the center, left side of the second straight wave guide; Be respectively equipped with the 4th straight wave guide between the upper and lower part, right side of the second straight wave guide and the upper and lower part, left side of the 5th straight wave guide, and lower-left and the upper-right position of upside the 4th straight wave guide are respectively equipped with the opening annulus, upper left and the position, bottom right of downside the 4th straight wave guide is respectively equipped with the square opening frame, equidistantly is placed with two the 3rd straight wave guides in the middle of two the 4th straight wave guides; The 6th straight wave guide and the 7th straight wave guide are symmetrically distributed in the right side of the 5th straight wave guide, and the right upper portion of the 5th straight wave guide is connected with the left end of the 6th straight wave guide, the lower right side of the 5th straight wave guide is connected with the left end of the 7th straight wave guide, the right-hand member of the 6th straight wave guide links to each other with the first signal output terminal, and the right-hand member of the 7th straight wave guide links to each other with the secondary signal output terminal; THz wave is inputted from signal input part, first signal output terminal output TE ripple, secondary signal output terminal output TM ripple, the function of acquisition polarization beam splitting.
The material of described matrix is silicon dioxide, and the length of matrix is 840 ~ 900 μ m, and width is 900 ~ 1000 μ m, highly is 200 ~ 300 μ m.The length of described the first straight wave guide is 150 ~ 200 μ m, and width is 50 ~ 60 μ m, highly is 40 ~ 60 μ m.The length of described the second straight wave guide is 30 ~ 40 μ m, and width is 500 ~ 600 μ m, highly is 40 ~ 60 μ m.The length of described the 3rd straight wave guide is 300 ~ 400 μ m, and width is 20 ~ 30 μ m, highly is 40 ~ 60 μ m; Spacing distance between two the 3rd straight wave guides is 150 ~ 160 μ m.The length of described the 4th straight wave guide is 300 ~ 400 μ m, and width is 40 ~ 50 μ m, highly is 40 ~ 60 μ m; The external radius of described opening annulus is 50 ~ 60 μ m, and inside radius is 30 ~ 40 μ m, and the opening length of annulus is 20 ~ 30 μ m; The outer edge lengths of described square opening frame is 100 ~ 120 μ m, and the width of square box is 20 ~ 30 μ m, and the opening length of square box is 20 ~ 30 μ m.The length of described the 5th straight wave guide is 90 ~ 100 μ m, and width is 500 ~ 600 μ m, highly is 40 ~ 60 μ m.The length of described the 6th straight wave guide and the 7th straight wave guide is 150 ~ 200 μ m, and width is 50 ~ 60 μ m, highly is 40 ~ 60 μ m; Distance between the 6th straight wave guide and the 7th straight wave guide is 280 ~ 290 μ m.The material of described the first straight wave guide, the second straight wave guide, the 3rd straight wave guide, the 4th straight wave guide, the 5th straight wave guide, the 6th straight wave guide, the 7th straight wave guide is silicon.
Scalariform terahertz polarization beam splitter of the present invention has simple in structure, and the beam splitting rate is high, and size is little, and cost is low, is convenient to the advantages such as making.
Description of drawings:
Fig. 1 is scalariform terahertz polarization beam splitter perspective view;
Fig. 2 is scalariform terahertz polarization beam splitter planar structure synoptic diagram;
Fig. 3 is first signal output terminal TE ripple, the TM ripple transmission curve of scalariform terahertz polarization beam splitter;
Fig. 4 is secondary signal output terminal TM ripple, the TE ripple transmission curve of scalariform terahertz polarization beam splitter.
Embodiment
Shown in Fig. 1 ~ 2, the scalariform terahertz polarization beam splitter comprises signal input part 1, first signal output terminal 2, secondary signal output terminal 3, matrix 4, the first straight wave guide 5, the second straight wave guide 6, the 3rd straight wave guide 7, the 4th straight wave guide 8, the 5th straight wave guide 9, the 6th straight wave guide 10, the 7th straight wave guide 11, opening annulus 12, square opening frame 13; Matrix 4 is provided with the first straight wave guide 5, the second straight wave guide 6, the 3rd straight wave guide 7, the 4th straight wave guide 8, the 5th straight wave guide 9, the 6th straight wave guide 10, the 7th straight wave guide 11, opening annulus 12, square opening frame 13, the left end of the first straight wave guide 5 links to each other with signal input part 1, and the right-hand member of the first straight wave guide 5 is connected in the center, left side of the second straight wave guide 6; Be respectively equipped with the 4th straight wave guide 8 between the upper and lower part, left side of the upper and lower part, right side of the second straight wave guide 6 and the 5th straight wave guide 9, and lower-left and the upper-right position of upside the 4th straight wave guide are respectively equipped with opening annulus 12, upper left and the position, bottom right of downside the 4th straight wave guide equidistantly is placed with two the 3rd straight wave guides 7 in the middle of being respectively equipped with 13, two the 4th straight wave guides 8 of square opening frame; The 6th straight wave guide 10 and the 7th straight wave guide 11 are symmetrically distributed in the right side of the 5th straight wave guide 9, and the right upper portion of the 5th straight wave guide 9 is connected with the left end of the 6th straight wave guide 10, the lower right side of the 5th straight wave guide 9 is connected with the left end of the 7th straight wave guide 11, the right-hand member of the 6th straight wave guide 10 links to each other with first signal output terminal 2, and the right-hand member of the 7th straight wave guide 11 links to each other with secondary signal output terminal 3; THz wave is from signal input part 1 input, and first signal output terminal 2 is exported the TE ripples, secondary signal output terminal 3 output TM ripples, the function of acquisition polarization beam splitting.
The material of described matrix 4 is silicon dioxide, and the length of matrix 4 is 840 ~ 900 μ m, and width is 900 ~ 1000 μ m, highly is 200 ~ 300 μ m.The length of described the first straight wave guide 5 is 150 ~ 200 μ m, and width is 50 ~ 60 μ m, highly is 40 ~ 60 μ m.The length of described the second straight wave guide 6 is 30 ~ 40 μ m, and width is 500 ~ 600 μ m, highly is 40 ~ 60 μ m.The length of described the 3rd straight wave guide 7 is 300 ~ 400 μ m, and width is 20 ~ 30 μ m, highly is 40 ~ 60 μ m; Spacing distance between two the 3rd straight wave guides 7 is 150 ~ 160 μ m.The length of described the 4th straight wave guide 8 is 300 ~ 400 μ m, and width is 40 ~ 50 μ m, highly is 40 ~ 60 μ m; The external radius of described opening annulus 12 is 50 ~ 60 μ m, and inside radius is 30 ~ 40 μ m, and the opening length of annulus is 20 ~ 30 μ m; The outer edge lengths of described square opening frame 13 is 100 ~ 120 μ m, and the width of square box is 20 ~ 30 μ m, and the opening length of square box is 20 ~ 30 μ m.The length of described the 5th straight wave guide 9 is 90 ~ 100 μ m, and width is 500 ~ 600 μ m, highly is 40 ~ 60 μ m.The length of described the 6th straight wave guide 10 and the 7th straight wave guide 11 is 150 ~ 200 μ m, and width is 50 ~ 60 μ m, highly is 40 ~ 60 μ m; Distance between the 6th straight wave guide 10 and the 7th straight wave guide 11 is 280 ~ 290 μ m.The material of described the first straight wave guide 5, the second straight wave guide 6, the 3rd straight wave guide 7, the 4th straight wave guide 8, the 5th straight wave guide 9, the 6th straight wave guide 10, the 7th straight wave guide 11 is silicon.
The scalariform terahertz polarization beam splitter:
The material of matrix is silicon dioxide, and length is 840 μ m, and width is 900 μ m, highly is 300 μ m.The length of the first straight wave guide is 200 μ m, and width is 60 μ m, highly is 40 μ m.The length of the second straight wave guide is 40 μ m, and width is 600 μ m, highly is 40 μ m.The length of the 3rd straight wave guide is 300 μ m, and width is 20 μ m, highly is 40 μ m; Spacing distance between two the 3rd straight wave guides is 160 μ m.The length of the 4th straight wave guide is 300 μ m, and width is 40 μ m, highly is 40 μ m; The external radius of opening annulus is 60 μ m, and inside radius is 40 μ m, and the opening length of annulus is 30 μ m; The outer edge lengths of square opening frame is 120 μ m, and the width of square box is 20 μ m, and the opening length of square box is 30 μ m.The length of the 5th straight wave guide is 100 μ m, and width is 600 μ m, highly is 40 μ m.The length of the 6th straight wave guide and the 7th straight wave guide is 200 μ m, and width is 60 μ m, highly is 40 μ m; Distance between the 6th straight wave guide and the 7th straight wave guide is 280 μ m.The material of the first straight wave guide, the second straight wave guide, the 3rd straight wave guide, the 4th straight wave guide, the 5th straight wave guide, the 6th straight wave guide, the 7th straight wave guide is silicon.The TE ripple of first signal output terminal, TM ripple transmission curve as shown in Figure 3, in 0.4 ~ 0.6THz band limits, the minimum transfer rate of TE ripple is that the maximum transfer rate of 99.7%, TM ripple is 0.3%, this explanation TE ripple is exported from the first signal output terminal.The TM ripple of secondary signal output terminal, TE ripple transmission curve as shown in Figure 4, in 0.4 ~ 0.6THz band limits, TM minimum transfer rate is that 99.4%, TE ripple maximum transfer rate is 0.4%, this explanation TM ripple is exported from the secondary signal output terminal.
Claims (9)
1. scalariform terahertz polarization beam splitter, comprise signal input part (1), first signal output terminal (2), secondary signal output terminal (3), matrix (4), characterized by further comprising the first straight wave guide (5), the second straight wave guide (6), the 3rd straight wave guide (7), the 4th straight wave guide (8), the 5th straight wave guide (9), the 6th straight wave guide (10), the 7th straight wave guide (11), opening annulus (12), square opening frame (13); Matrix (4) is provided with the first straight wave guide (5), the second straight wave guide (6), the 3rd straight wave guide (7), the 4th straight wave guide (8), the 5th straight wave guide (9), the 6th straight wave guide (10), the 7th straight wave guide (11), opening annulus (12), square opening frame (13), the left end of the first straight wave guide (5) links to each other with signal input part (1), and the right-hand member of the first straight wave guide (5) is connected in the center, left side of the second straight wave guide (6); Be respectively equipped with the 4th straight wave guide (8) between the upper and lower part, left side of the upper and lower part, right side of the second straight wave guide (6) and the 5th straight wave guide (9), and the lower-left of upside the 4th straight wave guide and upper-right position are respectively equipped with opening annulus (12), upper left and the position, bottom right of downside the 4th straight wave guide is respectively equipped with square opening frame (13), equidistantly is placed with two the 3rd straight wave guides (7) in the middle of two the 4th straight wave guides (8); The 6th straight wave guide (10) and the 7th straight wave guide (11) are symmetrically distributed in the right side of the 5th straight wave guide (9), and the right upper portion of the 5th straight wave guide (9) is connected with the left end of the 6th straight wave guide (10), the lower right side of the 5th straight wave guide (9) is connected with the left end of the 7th straight wave guide (11), the right-hand member of the 6th straight wave guide (10) links to each other with first signal output terminal (2), and the right-hand member of the 7th straight wave guide (11) links to each other with secondary signal output terminal (3); THz wave is from signal input part (1) input, and first signal output terminal (2) is exported the TE ripple, secondary signal output terminal (3) output TM ripple, the function of acquisition polarization beam splitting.
2. a kind of scalariform terahertz polarization beam splitter according to claim 1, the material that it is characterized in that described matrix (4) is silicon dioxide, and the length of matrix (4) is 840 ~ 900 μ m, and width is 900 ~ 1000 μ m, highly is 200 ~ 300 μ m.
3. a kind of scalariform terahertz polarization beam splitter according to claim 1, the length that it is characterized in that described the first straight wave guide (5) is 150 ~ 200 μ m, width is 50 ~ 60 μ m, highly is 40 ~ 60 μ m.
4. a kind of scalariform terahertz polarization beam splitter according to claim 1, the length that it is characterized in that described the second straight wave guide (6) is 30 ~ 40 μ m, width is 500 ~ 600 μ m, highly is 40 ~ 60 μ m.
5. a kind of scalariform terahertz polarization beam splitter according to claim 1, the length that it is characterized in that described the 3rd straight wave guide (7) is 300 ~ 400 μ m, width is 20 ~ 30 μ m, highly is 40 ~ 60 μ m; Spacing distance between two the 3rd straight wave guides (7) is 150 ~ 160 μ m.
6. a kind of scalariform terahertz polarization beam splitter according to claim 1, the length that it is characterized in that described the 4th straight wave guide (8) is 300 ~ 400 μ m, width is 40 ~ 50 μ m, highly is 40 ~ 60 μ m; The external radius of described opening annulus (12) is 50 ~ 60 μ m, and inside radius is 30 ~ 40 μ m, and the opening length of annulus is 20 ~ 30 μ m; The outer edge lengths of described square opening frame (13) is 100 ~ 120 μ m, and the width of square box is 20 ~ 30 μ m, and the opening length of square box is 20 ~ 30 μ m.
7. a kind of scalariform terahertz polarization beam splitter according to claim 1, the length that it is characterized in that described the 5th straight wave guide (9) is 90 ~ 100 μ m, width is 500 ~ 600 μ m, highly is 40 ~ 60 μ m.
8. a kind of scalariform terahertz polarization beam splitter according to claim 1 is characterized in that the length of described the 6th straight wave guide (10) and the 7th straight wave guide (11) is 150 ~ 200 μ m, and width is 50 ~ 60 μ m, highly is 40 ~ 60 μ m; Distance between the 6th straight wave guide (10) and the 7th straight wave guide (11) is 280 ~ 290 μ m.
9. a kind of scalariform terahertz polarization beam splitter according to claim 1 is characterized in that the material of described the first straight wave guide (5), the second straight wave guide (6), the 3rd straight wave guide (7), the 4th straight wave guide (8), the 5th straight wave guide (9), the 6th straight wave guide (10), the 7th straight wave guide (11) is silicon.
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB0124840D0 (en) * | 2001-10-16 | 2001-12-05 | Univ Nanyang | A polarization beam splitter |
| US7035491B2 (en) * | 2003-09-15 | 2006-04-25 | Little Optics, Inc. | Integrated optics polarization beam splitter using form birefringence |
| CN101632034B (en) * | 2007-03-09 | 2012-11-07 | 日本电气株式会社 | Thermo-optical phase shifter |
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Patent Citations (7)
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|---|---|---|---|---|
| JP2006184617A (en) * | 2004-12-28 | 2006-07-13 | Kyoto Univ | Two-dimensional photonic crystal and optical device using the same |
| CN101231363A (en) * | 2007-01-26 | 2008-07-30 | 中国科学院上海微系统与信息技术研究所 | Polarization beamsplitter based on photon crystal self-collimation as well as beam-splitting method thereof |
| CN101021598A (en) * | 2007-03-13 | 2007-08-22 | 浙江大学 | Photo crystal/multimode interference coupler-based mixed polarizing beam splitter |
| JP2008241770A (en) * | 2007-03-26 | 2008-10-09 | National Institute For Materials Science | Optical device containing nonlinear optical single crystal |
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| CN102156327A (en) * | 2011-04-11 | 2011-08-17 | 中国计量学院 | Terahertz wave polarizing beam splitter with dual resonance cavity structure |
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