CN202797204U - TeraHertz wave absorber with adjustable center frequency point - Google Patents
TeraHertz wave absorber with adjustable center frequency point Download PDFInfo
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- CN202797204U CN202797204U CN 201220502787 CN201220502787U CN202797204U CN 202797204 U CN202797204 U CN 202797204U CN 201220502787 CN201220502787 CN 201220502787 CN 201220502787 U CN201220502787 U CN 201220502787U CN 202797204 U CN202797204 U CN 202797204U
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- thz wave
- wave absorber
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- center frequency
- iron garnet
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Abstract
The utility model discloses a TeraHertz wave absorber with an adjustable center frequency point. The TeraHertz wave absorber comprises TeraHertz wave input ends, NxN structural units, and a magnetic field input end, wherein N is a natural number. The NxN structural units are periodically arranged on a plane which is vertical to an input direction of TeraHertz waves. The structural units comprise yttrium iron garnet sticks, double-C-shaped one-piece metal structural layers, matrixes and metal film layers. An end of the yttrium iron garnet stick is provided with the TeraHertz wave input end. The yttrium iron garnet sticks are symmetrically arranged on a side of the double-C-shaped one-piece metal structural layers at an interval. The double-C-shaped one-piece metal structural layer comprises two C-shaped metal pars and a rectangular metal strip. Two ends of the rectangular metal strip are respectively connected with centers of the two C-shaped metal pars. The other side of the double-C-shaped one-piece metal structural layer is connected with a side of the matrix, and the other side of the matrix is connected with the metal film layer. The TeraHertz wave absorber is advantaged by high absorptivity, small size, simple and compact structure, convenient adjustment, etc.
Description
Technical field
The utility model relates to absorber, relates in particular to the adjustable THz wave absorber of a kind of center frequency points.
Background technology
THz wave refers to frequency at 0.1～10THz, and wavelength is the electromagnetic wave in 3000～30 mu m ranges.Terahertz wave band is between microwave and millimeter wave and the infrared optical, is the transition region between electronics and the photonic propulsion.It coincides in long-wave band and millimeter wave, and coincides at short-wave band and infrared ray.Because Terahertz is at the specific position of electromagnetic spectrum, the blank spot on scientific research and technology are used is a lot, so terahertz wave band is also referred to as " Terahertz space " (Terahertz Gap).THz wave has superior performance, all have important researching value and application prospect in application branches of learning such as the basic research subjects such as physics, chemistry and life science and medical imaging, safety inspection, product detection, space communications, receive the concern of countries in the world.Terahertz wave source and checkout gear have successfully been developed in the world at present.Research finds that THz wave is safer as a kind of high-frequency electromagnetic Bob X ray, is applied to many fields such as medical diagnosis, safety inspection, biomedicine, agricultural, space astronomy, Non-Destructive Testing and Terahertz communication.Because the wide application prospect of THz wave, countries in the world are all very paid attention to for the research of THz wave science and technology.
The THz wave absorber is a kind of very important THz wave function element, and it has huge application potential at aspects such as stealth material, detection and sensings.But existing THz wave absorber structure is complicated, absorptivity is low, absorption frequency point is fixing.Therefore in the urgent need to working out a kind of simple in structure, needs that THz wave absorber that absorptivity is high, frequency range is easy to regulate satisfies the Terahertz practical application.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of center frequency points adjustable THz wave absorber.
In order to achieve the above object, the technical solution of the utility model is as follows:
The THz wave absorber that center frequency points is adjustable comprises THz wave input, N * N construction unit, magnetic field input, and N is natural number; N * N construction unit periodic arrangement is on the plane vertical with the THz wave input direction, construction unit comprises the yttrium iron garnet rod, double C shape disjunctor structured metal layer, matrix and metal film layer, one side of yttrium iron garnet rod is provided with the THz wave input, the symmetrical interval of yttrium iron garnet rod is placed on a side of double C shape disjunctor structured metal layer, double C shape disjunctor structured metal layer comprises two C type metalworks and a rectangular metal bar, the two ends of rectangular metal bar link to each other with the center of two C type metalworks respectively, the opposite side of double C shape disjunctor structured metal layer links to each other with matrix one side, and the opposite side of matrix links to each other with metal film layer.
The front view of the N * N of a described periodic arrangement construction unit is square, and the square length of side is 49 μ m ~ 51 μ m.Described yttrium iron garnet rod is rectangular structure, and bottom surface is square, and the length of side is 5 μ m ~ 7 μ m, and height is 49 μ m ~ 50 μ m, and the distance between interior two the yttrium iron garnet rods of construction unit is 31 μ m ~ 32 μ m.The material of described double C shape disjunctor structured metal layer is gold, and thickness is 0.2 μ m ~ 0.5 μ m.Described rectangular metal bar length is 4 μ m ~ 5 μ m, wide is 27 μ m ~ 29 μ m, C type metalwork length is 35 μ m ~ 37 μ m, wide is 16 μ m ~ 17 μ m, the two ends length of C type metalwork is 7 μ m ~ 9 μ m, be spaced apart 2 μ m ~ 3 μ m between two C type metalworks, the metal live width is 4 μ m ~ 5 μ m.Described matrix is polyimides, and thickness is 21 μ m ~ 23 μ m.The material of described metal film layer is gold, and thickness is 0.2 μ m ~ 0.5 μ m.
The advantage such as the utlity model has the absorptivity height, size is little, simple and compact for structure, and is easy to adjust.
Description of drawings
Fig. 1 is the construction unit schematic diagram of the adjustable THz wave absorber of center frequency points;
Fig. 2 is the double C shape disjunctor structured metal layer schematic diagram of the adjustable THz wave absorber of center frequency points;
Fig. 3 is the front view of the adjustable THz wave absorber of center frequency points;
Fig. 4 is the absorption curve figure of the adjustable THz wave absorber of center frequency points under different externally-applied magnetic field conditions.
Embodiment
Shown in Fig. 1 ~ 3, the THz wave absorber that center frequency points is adjustable is characterized in that comprising THz wave input 1, N * N construction unit 2, magnetic field input 9, and N is natural number; N * N construction unit 2 periodic arrangement are on the plane vertical with the THz wave input direction, construction unit 2 comprises yttrium iron garnet rod 3, double C shape disjunctor structured metal layer 4, matrix 5 and metal film layer 6, one side of yttrium iron garnet rod 3 is provided with THz wave input 1, yttrium iron garnet rod 3 symmetrical intervals are placed on a side of double C shape disjunctor structured metal layer 4, double C shape disjunctor structured metal layer 4 comprises two C type metalworks 7 and a rectangular metal bar 8, the two ends of rectangular metal bar 8 link to each other with the center of two C type metalworks 7 respectively, the opposite side of double C shape disjunctor structured metal layer 4 links to each other with matrix 5 one sides, and the opposite side of matrix 5 links to each other with metal film layer 6.
The front view of the N * N of a described periodic arrangement construction unit 2 is square, and the square length of side is 49 μ m ~ 51 μ m.Described yttrium iron garnet rod 3 is rectangular structure, and bottom surface is square, and the length of side is 5 μ m ~ 7 μ m, and height is 49 μ m ~ 50 μ m, and the distance between interior two the yttrium iron garnet rods of construction unit is 31 μ m ~ 32 μ m.The material of described double C shape disjunctor structured metal layer 4 is gold, and thickness is 0.2 μ m ~ 0.5 μ m.Described rectangular metal bar 8 length are 4 μ m ~ 5 μ m, wide is 27 μ m ~ 29 μ m, C type metalwork 7 length are 35 μ m ~ 37 μ m, wide is 16 μ m ~ 17 μ m, the two ends length of C type metalwork 7 is 7 μ m ~ 9 μ m, be spaced apart 2 μ m ~ 3 μ m between two C type metalworks 7, the metal live width is 4 μ m ~ 5 μ m.Described matrix 5 is polyimides, and thickness is 21 μ m ~ 23 μ m.The material of described metal film layer 6 is gold, and thickness is 0.2 μ m ~ 0.5 μ m.
Embodiment 1
The THz wave absorber that center frequency points is adjustable:
Choice structure unit number N=100.The front view of the N * N of a periodic arrangement construction unit is square, and the square length of side is 50 μ m.The yttrium iron garnet rod is rectangular structure, and bottom surface is square, and the length of side is 6 μ m, and height is 50 μ m, and the distance between interior two the yttrium iron garnet rods of construction unit is 32 μ m.The material of double C shape disjunctor structured metal layer is gold, and thickness is 0.2 μ m.Rectangular metal bar length is 4 μ m, and wide is 28 μ m, and C type metalwork length is 36 μ m, and wide is 17 μ m, and the two ends length of C type metalwork is 8 μ m, is spaced apart 2 μ m between two C type metalworks, and the metal live width is 4 μ m.Matrix is polyimides, and thickness is 22 μ m.The material of metal film layer is gold, and thickness is 0.2 μ m.As seen from Figure 4, when externally-applied magnetic field was 0Oe, the frequency of absorption peak size was 0.532THz, and absorptivity is 99.90%; When externally-applied magnetic field was 140kOe, the frequency of absorption peak size was 0.535THz, and absorptivity is 99.81%; When externally-applied magnetic field was 180kOe, the frequency of absorption peak size was 0.536THz, and absorptivity is 99.61%; This explanation has realized the movement of absorption peak frequency by changing the size of externally-applied magnetic field, has reached adjustable purpose.
Claims (7)
1. the THz wave absorber that center frequency points is adjustable is characterized in that comprising THz wave input (1), N * N construction unit (2), magnetic field input (9), and N is natural number; N * N construction unit (2) periodic arrangement is on the plane vertical with the THz wave input direction, construction unit (2) comprises yttrium iron garnet rod (3), double C shape disjunctor structured metal layer (4), matrix (5) and metal film layer (6), one side of yttrium iron garnet rod (3) is provided with THz wave input (1), yttrium iron garnet rod (3) symmetrical interval is placed on a side of double C shape disjunctor structured metal layer (4), double C shape disjunctor structured metal layer (4) comprises two C type metalworks (7) and a rectangular metal bar (8), the two ends of rectangular metal bar (8) link to each other with the center of two C type metalworks (7) respectively, the opposite side of double C shape disjunctor structured metal layer (4) links to each other with matrix (5) one sides, and the opposite side of matrix (5) links to each other with metal film layer (6).
2. the adjustable THz wave absorber of a kind of center frequency points according to claim 1 is characterized in that the front view of N * N the construction unit (2) of described periodic arrangement is square, and the square length of side is 49 μ m ~ 51 μ m.
3. the adjustable THz wave absorber of a kind of center frequency points as claimed in claim 1, it is characterized in that described yttrium iron garnet rod (3) is rectangular structure, bottom surface is square, the length of side is 5 μ m ~ 7 μ m, height is 49 μ m ~ 50 μ m, and the distance between interior two the yttrium iron garnet rods of construction unit is 31 μ m ~ 32 μ m.
4. the adjustable THz wave absorber of a kind of center frequency points as claimed in claim 1 is characterized in that the material of described double C shape disjunctor structured metal layer (4) is gold, and thickness is 0.2 μ m ~ 0.5 μ m.
5. the adjustable THz wave absorber of a kind of center frequency points as claimed in claim 1, it is characterized in that described rectangular metal bar (8) length is 4 μ m ~ 5 μ m, wide is 27 μ m ~ 29 μ m, C type metalwork (7) length is 35 μ m ~ 37 μ m, wide is 16 μ m ~ 17 μ m, the two ends length of C type metalwork (7) is 7 μ m ~ 9 μ m, is spaced apart 2 μ m ~ 3 μ m between two C type metalworks (7), and the metal live width is 4 μ m ~ 5 μ m.
6. the adjustable THz wave absorber of a kind of center frequency points as claimed in claim 1 is characterized in that described matrix (5) is polyimides, and thickness is 21 μ m ~ 23 μ m.
7. the adjustable THz wave absorber of a kind of center frequency points as claimed in claim 1 is characterized in that the material of described metal film layer (6) is gold, and thickness is 0.2 μ m ~ 0.5 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220502787 CN202797204U (en) | 2012-09-27 | 2012-09-27 | TeraHertz wave absorber with adjustable center frequency point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220502787 CN202797204U (en) | 2012-09-27 | 2012-09-27 | TeraHertz wave absorber with adjustable center frequency point |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202797204U true CN202797204U (en) | 2013-03-13 |
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| CN 201220502787 Expired - Fee Related CN202797204U (en) | 2012-09-27 | 2012-09-27 | TeraHertz wave absorber with adjustable center frequency point |
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| CN (1) | CN202797204U (en) |
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2012
- 2012-09-27 CN CN 201220502787 patent/CN202797204U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20130927 |