CN102902017B - Terahertz wave polarization beam splitter with double regular hexagon structures - Google Patents
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- CN102902017B CN102902017B CN201210379305.9A CN201210379305A CN102902017B CN 102902017 B CN102902017 B CN 102902017B CN 201210379305 A CN201210379305 A CN 201210379305A CN 102902017 B CN102902017 B CN 102902017B
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- 229910001218 Gallium arsenide Inorganic materials 0.000 claims description 4
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Abstract
本发明公开了一种双正六边形结构的太赫兹波偏振分束器。它包括太赫兹波输入端、第一输出端、第二输出端、平板偏振器；平板偏振器的上部设有第一孔状镂空阵列，中间设有第二孔状镂空阵列，下部设有第三孔状镂空阵列和第四孔状镂空阵列，第一孔状镂空阵列与第二孔状镂空阵列之间左侧设有太赫兹波输入端，第一孔状镂空阵列与第二孔状镂空阵列之间右侧设有第一输出端，第二孔状镂空阵列与第四孔状镂空阵列之间右侧设有第二输出端。本发明具有结构简单紧凑，尺寸小，体积小，质量轻，分束率高等优点，满足在太赫兹波医学成像、环境监测、太赫兹波通信等领域应用的要求。
The invention discloses a double regular hexagonal structure terahertz wave polarization beam splitter. It includes a terahertz wave input terminal, a first output terminal, a second output terminal, and a flat polarizer; the upper part of the flat polarizer is provided with a first hole-shaped hollow array, the middle is provided with a second hole-shaped hollow array, and the lower part is provided with a second hole-shaped hollow array. The three hole-shaped hollow array and the fourth hole-shaped hollow array, a terahertz wave input terminal is arranged on the left side between the first hole-shaped hollow array and the second hole-shaped hollow array, the first hole-shaped hollow array and the second hole-shaped hollow array A first output terminal is provided on the right side between the arrays, and a second output terminal is provided on the right side between the second hole-shaped hollow array and the fourth hole-shaped hollow array. The invention has the advantages of simple and compact structure, small size, small volume, light weight, high beam splitting rate, etc., and meets the requirements of applications in the fields of terahertz wave medical imaging, environmental monitoring, terahertz wave communication and the like.
Description
Technical field
The present invention relates to beam splitter, relate in particular to the terahertz polarization beam splitter of a kind of pair of regular hexagon structure.
Background technology
Terahertz frequency domain refers to that frequency is at 0.1THz ~ 10THz, the electromagnetic wave band between the front end in microwave and the low frequency end of far red light.It is the field to photonics transition in electronics, the integrated advantage of microwave communication with optical communication: first THz wave is communicated by letter and can be obtained the bandwidth more much bigger than microwave communication, can effectively solve the problem of increasingly serious band resource shortage.THz wave has good penetrability in addition, and it can penetrate with very little decay the materials such as flue dust, wall, carbon plate, cloth and pottery, has solved the limitation of optical communication in the rugged surroundings such as flue dust.The transport property of THz wave has determined that THz wave can be applied to radio communication.Growing THz wave technology all has great scientific value and wide application prospect at aspects such as astronomical, biomedicine, safety and environmental monitoring, imaging, broadband wireless communications, wherein the THz wave communication technology has the characteristic of millimetre-wave attenuator and optical communication, can be applied to the aspects such as indoor local area network communication.Research institution about THz wave emerges in multitude in the world, and has obtained a lot of achievements in research, and Terahertz Technology will be the focus of broad research in following a very long time world wide.
Although recent domestic launches gradually for the research of THz wave function element, but THz wave function element is as the Focal point and difficult point in the application of THz wave science and technology, need to carry out a large amount of research work, for the function element of THz wave, study also and launch gradually both at home and abroad at present.Terahertz polarization beam splitter is a kind of very important THz wave device, for controlling, control the THz wave of THz wave system, therefore, terahertz polarization beam splitter research is to promoting the research of THz wave function element to have indispensable significance.Yet at present, the polarization beam splitting device of terahertz wave band is also very limited, existing terahertz polarization beam splitter often complex structure, bulky, be difficult to make and expensive, being therefore necessary to design a kind of terahertz polarization beam splitter simple and compact for structure, that volume is little, quality is light, beam splitting efficiency is high meets following THz wave technology application needs.
Summary of the invention
The object of the invention is to overcome prior art deficiency, the terahertz polarization beam splitter of a kind of pair of regular hexagon structure is provided.
In order to achieve the above object, technical scheme of the present invention is as follows:
The terahertz polarization beam splitter of two regular hexagon structures comprises THz wave input end, the first output terminal, the second output terminal, flat-plate polarizing device, the top of flat-plate polarizing device is provided with the first poroid hollow out array, the centre of flat-plate polarizing device is provided with the second poroid hollow out array, the bottom of flat-plate polarizing device is provided with the 3rd poroid hollow out array and the 4th poroid hollow out array from top to bottom, the first poroid hollow out array is comprised of 3 * N coarse pored hollow out, the 3rd poroid hollow out array is comprised of 1 * N coarse pored hollow out, the 4th poroid hollow out array is comprised of 4 * N coarse pored hollow out, N is natural number, the regular hexagon structure that the second poroid hollow out array comprises upper left side and the regular hexagon structure of lower right side, the remaining position of the second poroid hollow out array is comprised of coarse pored hollow out, every four poroid hollow outs form a limit of regular hexagon structure, it is two coarse pored hollow outs by two ends that the regular hexagon structure of upper left side and the regular hexagon structure of lower right side share, centre is the hypotenuse that two small pore-like hollow outs form, the top of the regular hexagon structure of upper left side and the regular hexagon structure of lower right side by two ends, are two coarse pored hollow outs below, centre is that two small pore-like hollow outs form, in the middle of the regular hexagon structure of upper left side and the regular hexagon structure of lower right side, be equipped with the blossom type hollow out array being formed by coarse pored hollow out, adjacent two row of all poroid hollow out array on flat-plate polarizing device are all staggered, between the first poroid hollow out array and the second poroid hollow out array, left side is provided with THz wave input end, between the first poroid hollow out array and the second poroid hollow out array, right side is provided with the first output terminal, between the second poroid hollow out array and the 4th poroid hollow out array, right side is provided with the second output terminal, when THz wave is inputted from THz wave input end, by the coupling of the second regular hexagon structure of poroid hollow out array upper left side and the regular hexagon structure of lower right side, TE ripple will be from the second output output, and TM ripple is directly from the first output terminal output, realize the effect of polarization beam splitting.
Described adjacent coarse pored hollow out spacing and adjacent small pore-like hollow out spacing are 240 ~ 260 μ m.Described coarse pored hollow out radius is 80 ~ 90 μ m, and small pore-like hollow out radius is 40 ~ 50 μ m.The distance that described adjacent two row of whole poroid hollow out array stagger is 120 ~ 130 μ m.The material of described flat-plate polarizing device is gallium arsenide.
The terahertz polarization beam splitter of of the present invention pair of regular hexagon structure has the present invention and has simple and compact for structure, size is little, and volume is little, and quality is light, beam splitting rate advantages of higher, meets the requirement in field application such as THz wave medical imaging, environmental monitoring, THz wave communications.
Accompanying drawing explanation:
Fig. 1 is the three-dimensional structure schematic diagram of the terahertz polarization beam splitter of two regular hexagon structures;
Fig. 2 is the two-dimensional structure schematic diagram of the terahertz polarization beam splitter of two regular hexagon structures;
Fig. 3 is TM, the transmission curve figure of TE ripple of the terahertz polarization beam splitter first output terminal output of two regular hexagon structures;
Fig. 4 is TE, the transmission curve figure of TM ripple of the terahertz polarization beam splitter second output terminal output of two regular hexagon structures.
Embodiment
As shown in Figure 1 and 2, the terahertz polarization beam splitter of two regular hexagon structures comprises THz wave input end 1, the first output terminal 2, the second output terminal 3, flat-plate polarizing device 4, the top of flat-plate polarizing device 4 is provided with the first poroid hollow out array 5, the centre of flat-plate polarizing device 4 is provided with the second poroid hollow out array 6, the bottom of flat-plate polarizing device 4 is provided with the 3rd poroid hollow out array 7 and the 4th poroid hollow out array 8 from top to bottom, the first poroid hollow out array 5 is comprised of 3 * N coarse pored hollow out 9, the 3rd poroid hollow out array 7 is comprised of 1 * N coarse pored hollow out 9, the 4th poroid hollow out array 8 is comprised of 4 * N coarse pored hollow out 9, the regular hexagon structure 11 that the second poroid hollow out array 6 comprises upper left side and the regular hexagon structure 12 of lower right side, the remaining position of the second poroid hollow out array 6 is comprised of coarse pored hollow out 9, N is natural number, every four poroid hollow outs form a limit of regular hexagon structure, it is two coarse pored hollow outs 9 by two ends that the regular hexagon structure 11 of upper left side and the regular hexagon structure of lower right side 12 share, centre is the hypotenuse 13 that two small pore-like hollow outs 10 form, the top of the regular hexagon structure 11 of upper left side and the regular hexagon structure 12 of lower right side by two ends, are two coarse pored hollow outs 9 below, centre is that two small pore-like hollow outs 10 form, in the middle of the regular hexagon structure 11 of upper left side and the regular hexagon structure of lower right side 12, be equipped with the blossom type hollow out array being formed by coarse pored hollow out 9, adjacent two row of all poroid hollow out array on flat-plate polarizing device 4 are all staggered, between the first poroid hollow out array 5 and the second poroid hollow out array 6, left side is provided with THz wave input end 1, between the first poroid hollow out array 5 and the second poroid hollow out array 6, right side is provided with the first output terminal 2, between the second poroid hollow out array 6 and the 4th poroid hollow out array 8, right side is provided with the second output terminal 3, when THz wave is inputted from THz wave input end 1, by the coupling of the second regular hexagon structure 11 of poroid hollow out array 6 upper left sides and the regular hexagon structure 12 of lower right side, TE ripple will be from the second output 3 outputs, and TM ripple is directly from the first output terminal 2 outputs, realize the effect of polarization beam splitting.
Described adjacent coarse pored hollow out 9 spacing and adjacent small pore-like hollow out 10 spacing are 240 ~ 260 μ m.Described coarse pored hollow out 9 radiuses are 80 ~ 90 μ m, and small pore-like hollow out 10 radiuses are 40 ~ 50 μ m.The distance that described adjacent two row of whole poroid hollow out array stagger is 120 ~ 130 μ m.The material of described flat-plate polarizing device 4 is gallium arsenide.
embodiment 1
The first poroid hollow out array of the terahertz polarization beam splitter of two regular hexagon structures is comprised of 3 * 32 coarse pored hollow outs, the second poroid hollow out array has 10 row, the 3rd poroid hollow out array is comprised of 1 * 19 coarse pored hollow out, and the 4th poroid hollow out array is comprised of 4 * 32 coarse pored hollow outs.Adjacent coarse pored hollow out and adjacent small pore-like hollow out spacing are 240 μ m.Coarse pored hollow out radius is 80 μ m, and small pore-like hollow out radius is 40 μ m.Adjacent two row of the whole poroid hollow out array on flat-plate polarizing device are all staggered, and the distance staggering is 120 μ m.The material of flat-plate polarizing device is gallium arsenide, and refractive index is 3.25.The TM ripple of the terahertz polarization beam splitter first output terminal output of two regular hexagon structures, the transmission curve of TE ripple as shown in Figure 3, in 0.3 ~ 1.2THz band limits, the maximum transfer rate of TM ripple is that the minimum transfer rate of 0.98, TE ripple is 0.02.The TE ripple of the terahertz polarization beam splitter second output terminal output of two regular hexagon structures, the transmission curve of TM ripple as shown in Figure 4, in 0.3 ~ 1.2THz band limits, TE ripple maximum transfer rate is that 0.97, TM ripple minimum transfer rate is 0.01.The first output terminal output TM ripple of the terahertz polarization beam splitter of two regular hexagon structures that this explanation the present invention is designed, the second output terminal output TE ripple, has realized the function of polarization beam splitting, and has had higher beam splitting efficiency.
Claims (4)
1. a terahertz polarization beam splitter for two regular hexagon structures, is characterized in that comprising THz wave input end (1), the first output terminal (2), the second output terminal (3), flat-plate polarizing device (4); the top of flat-plate polarizing device (4) is provided with the first poroid hollow out array (5), the centre of flat-plate polarizing device (4) is provided with the second poroid hollow out array (6), the bottom of flat-plate polarizing device (4) is provided with the 3rd poroid hollow out array (7) and the 4th poroid hollow out array (8) from top to bottom, the first poroid hollow out array (5) is comprised of 3 * 32 coarse pored hollow outs (9), the 3rd poroid hollow out array (7) is comprised of 1 * 19 coarse pored hollow out (9), the 4th poroid hollow out array (8) is comprised of 4 * 32 coarse pored hollow outs (9), the regular hexagon structure (11) that the second poroid hollow out array (6) comprises upper left side and the regular hexagon structure (12) of lower right side, the remaining position of the second poroid hollow out array (6) is comprised of coarse pored hollow out (9), every four poroid hollow outs form a limit of regular hexagon structure, it is two coarse pored hollow outs (9) by two ends that the regular hexagon structure (11) of upper left side and the regular hexagon structure (12) of lower right side share, centre is the hypotenuse (13) that two small pore-like hollow outs (10) form, the top of the regular hexagon structure (11) of upper left side and the regular hexagon structure (12) of lower right side by two ends, are two coarse pored hollow outs (9) below, centre is that two small pore-like hollow outs (10) form, in the middle of the regular hexagon structure (11) of upper left side and the regular hexagon structure (12) of lower right side, be equipped with the blossom type hollow out array being formed by coarse pored hollow out (9), adjacent two row of all poroid hollow out array on flat-plate polarizing device (4) are all staggered, between the first poroid hollow out array (5) and the second poroid hollow out array (6), left side is provided with THz wave input end (1), between the first poroid hollow out array (5) and the second poroid hollow out array (6), right side is provided with the first output terminal (2), between the second poroid hollow out array (6) and the 4th poroid hollow out array (8), right side is provided with the second output terminal (3), when THz wave is inputted from THz wave input end (1), by the coupling of the second regular hexagon structure (11) of poroid hollow out array (6) upper left side and the regular hexagon structure (12) of lower right side, TE ripple will be exported from the second output terminal (3), and TM ripple is directly exported from the first output terminal (2), realize the effect of polarization beam splitting.
2. the terahertz polarization beam splitter of a kind of pair of regular hexagon structure according to claim 1, is characterized in that described coarse pored hollow out (9) radius is 80 ~ 90 μ m, and small pore-like hollow out (10) radius is 40 ~ 50 μ m.
3. the terahertz polarization beam splitter of a kind of pair of regular hexagon structure according to claim 1, is characterized in that the distance that described adjacent two row of all poroid hollow out array stagger is 120 ~ 130 μ m.
4. the terahertz polarization beam splitter of a kind of pair of regular hexagon structure according to claim 1, is characterized in that the material of described flat-plate polarizing device (4) is gallium arsenide.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251627A (en) * | 2008-03-28 | 2008-08-27 | 中国科学院上海技术物理研究所 | Photonic crystal waveguide polarizing beam splitter |
| CN102156327A (en) * | 2011-04-11 | 2011-08-17 | 中国计量学院 | Terahertz wave polarizing beam splitter with dual resonance cavity structure |
| CN102200613A (en) * | 2011-05-24 | 2011-09-28 | 北京邮电大学 | A Realization Method of Polarizing Beam Splitter and Slow Optical Device Integration Using Bending Waveguide |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4923234B2 (en) * | 2004-12-28 | 2012-04-25 | 国立大学法人京都大学 | Two-dimensional photonic crystal and optical device using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251627A (en) * | 2008-03-28 | 2008-08-27 | 中国科学院上海技术物理研究所 | Photonic crystal waveguide polarizing beam splitter |
| CN102156327A (en) * | 2011-04-11 | 2011-08-17 | 中国计量学院 | Terahertz wave polarizing beam splitter with dual resonance cavity structure |
| CN102200613A (en) * | 2011-05-24 | 2011-09-28 | 北京邮电大学 | A Realization Method of Polarizing Beam Splitter and Slow Optical Device Integration Using Bending Waveguide |
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