CN103175609A - Device using high-temperature superconducting YBCO (yttrium barium copper oxide) bicrystal junction for detecting terahertz radiation of high-temperature superconducting BSCCO (bismuth strontium calcium copper oxide) - Google Patents
Device using high-temperature superconducting YBCO (yttrium barium copper oxide) bicrystal junction for detecting terahertz radiation of high-temperature superconducting BSCCO (bismuth strontium calcium copper oxide) Download PDFInfo
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- CN103175609A CN103175609A CN2013100672150A CN201310067215A CN103175609A CN 103175609 A CN103175609 A CN 103175609A CN 2013100672150 A CN2013100672150 A CN 2013100672150A CN 201310067215 A CN201310067215 A CN 201310067215A CN 103175609 A CN103175609 A CN 103175609A
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- ybco
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- 229910021521 yttrium barium copper oxide Inorganic materials 0.000 title claims abstract description 43
- 230000005855 radiation Effects 0.000 title abstract description 10
- OSOKRZIXBNTTJX-UHFFFAOYSA-N [O].[Ca].[Cu].[Sr].[Bi] Chemical compound [O].[Ca].[Cu].[Sr].[Bi] OSOKRZIXBNTTJX-UHFFFAOYSA-N 0.000 title abstract 2
- BTGZYWWSOPEHMM-UHFFFAOYSA-N [O].[Cu].[Y].[Ba] Chemical compound [O].[Cu].[Y].[Ba] BTGZYWWSOPEHMM-UHFFFAOYSA-N 0.000 title abstract 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 38
- 239000010703 silicon Substances 0.000 claims abstract description 38
- 239000013078 crystal Substances 0.000 claims description 31
- 239000002887 superconductor Substances 0.000 claims description 14
- 239000010949 copper Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000007767 bonding agent Substances 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 238000009713 electroplating Methods 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000011161 development Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 2
- 229910004247 CaCu Inorganic materials 0.000 description 1
- 230000005668 Josephson effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The invention discloses a device using a high-temperature superconducting YBCO (yttrium barium copper oxide) bicrystal junction for detecting terahertz radiation of high-temperature superconducting BSCCO (bismuth strontium calcium copper oxide). The device comprises a first body and a second body which are mutually connected, perforations are arranged at corresponding positions of the first body and the second body respectively, a first super-hemispherical silicon lens and a second super-hemispherical silicon lens are arranged in the perforations, to-be-detected BSCCO is arranged on one outer side of the first super-hemispherical silicon lens, a BSCCO junction is guaranteed to be aligned with the center of the first super-hemispherical silicon lens, to-be-detected YBCO is arranged on the outer side of the second super-hemispherical silicon lens, and a YBCO junction is guaranteed to be aligned with the center of the second super-hemispherical silicon lens. The device is simple in structure, ingenious in design and capable of reducing loss of radiation to the utmost extent. By the aid of the device, the high-temperature superconducting YBCO bicrystal junction can be used for detecting terahertz radiation from the BSCCO successfully. A foundation is laid for future development of high-temperature superconducting YBCO terahertz detector integrated with local oscillators.
Description
Technical field
The present invention relates to HTS YBCO twin crystal knot terahertz detector and high-temperature superconductor BSCCO THz source correlation technique, be specifically related to a kind of device that uses HTS YBCO twin crystal knot to survey high-temperature superconductor BSCCO terahertz emission.
Background technology
YBa
2Cu
3O
7(YBCO) twin crystal knot is to utilize epitaxial growth high-temperature superconducting thin film (YBCO material) on the twin crystal substrate, utilizes artificial crystal boundary and the weak johning knot that consists of.It is a kind of Josephson knot, and its IV curve satisfies the Josephson effect, can be used for as the detector of surveying THz wave.Compare with other high-temperature superconducting thin film knot, the commercialization of twin crystal substrate, the growth technique of ybco film is also very ripe, and preparation technology is fairly simple for the twin crystal knot, the junction characteristic high conformity, and yield rate is high, good reproducibility, the frequency response of knot Terahertz is high, is widely used.
Bi
2Sr
2CaCu
2O
8(BSCCO) be also a kind of high temperature superconducting materia, utilize the Intrinsic Josephson Junctions (IJJ) of its preparation can the radiation THz wave, this technology have obtained development very in recent years, at present its at the reckoning power in 4 π spaces greater than 30
μW, frequency is up to and reaches 2.5THz, and this technology can be used in some field at present.
HTS YBCO twin crystal knot is as terahertz detector, has that noise is low, response is fast, highly sensitive, precision is high, response frequency is high, the working temperature advantages of higher.High-temperature superconductor BSCCO Intrinsic Josephson Junctions is as THz source, and its radiation has the characteristics such as the frequency adjustable extent is large, ray purity is high, stable.If so can perhaps can use BSCCO as local oscillator both combinations, and use YBCO as frequency mixer, have finally prepared the high-temperature superconductor terahertz detector of local oscillator integrated.As the first step of this integrated detector, at first need to use YBCO successfully to detect BSCCO and give off THz wave, and the present relevant report of this direction not still in the world.
Summary of the invention
Goal of the invention: for technological gap, the purpose of this invention is to provide a kind of device that uses HTS YBCO twin crystal knot to survey high-temperature superconductor BSCCO terahertz emission, to realizing using the detection of high-temperature superconductor BSCCO terahertz emission of becoming a partner of HTS YBCO twin crystal.
Technical scheme: in order to realize the foregoing invention purpose, the technical solution used in the present invention is:
A kind of device that uses HTS YBCO twin crystal knot to survey high-temperature superconductor BSCCO terahertz emission is characterized in that: comprise interconnective main body one and main body two, establish perforation at the correspondence position of described main body one and main body two respectively; Establish super hemisphere silicon lens one and super hemisphere silicon lens two in described perforation; BSCCO to be measured is located at super hemisphere silicon lens one outside, and guarantees the become a partner center of accurate super hemisphere silicon lens one of BSCCO; YBCO to be measured is located at super hemisphere silicon lens two outsides, and guarantees the become a partner center of accurate super hemisphere silicon lens two of YBCO.
Described super hemisphere silicon lens one and super hemisphere silicon lens two all are fixed in perforation by the low temperature heat-conductive bonding agent.
Described main body one and main body two are made by red copper processing, electroplating gold on surface.
Described super hemisphere silicon lens one is relative with the common axis of super hemisphere silicon lens two and sphere.
Device of the present invention will be integrated on this device as the YBCO twin crystal of receiver knot with as the BSCCO of emissive source, only need a refrigeration machine just complete test, the simplification test process.Use the relative mode of hyper-hemispherical lens sphere of two symmetries, make transmitting terminal and receiving end all precisely focus on, thus the radiation power of enhanced rad to the receiver greatly.Utilize this method of testing in experiment, use YBCO twin crystal knot to survey the terahertz emission of BSCCO at the 25K temperature, 7 Xia Piluo steps appear at most on the IV curve of YBCO, lay a good foundation for the application such as superconduction Terahertz receiver that realize from now on integrated local oscillator, as seen this invention has good application and development prospect.
Beneficial effect: device of the present invention, simple in structure, design ingenious, the terahertz emission that radiates diffusion from transmitting terminal BSCCO becomes directional light through after super hemisphere silicon lens, directional light focuses on YBCO by another identical super hemisphere silicon lens again, the radiation of transmitting terminal and receiving end all focuses on like this, and two lens distance very near (approximately 2mm), reduces to the full extent the loss of radiation.Use device of the present invention, can successfully use the HTS YBCO twin crystal to tie the terahertz emission that has detected from BSCCO.For the HTS YBCO terahertz detector of developing from now on local oscillator integrated lays the first stone.
Description of drawings
Fig. 1 uses HTS YBCO twin crystal knot to survey the structural representation of the device of high-temperature superconductor BSCCO terahertz emission;
Fig. 2 is the side view of Fig. 1;
Fig. 3 carries the structural representation of BSCCO main body one;
Fig. 4 is the structural representation of carrying YBCO main body two;
Fig. 5 is the measurement effect schematic diagram that uses device of the present invention;
Fig. 6 uses device of the present invention to test the IV curve map of the YBCO that measures;
Fig. 7 is the structural representation of super hemisphere silicon lens.
Embodiment
The present invention is described further below in conjunction with accompanying drawing.
As shown in Fig. 1,2,3 and 4, use HTS YBCO twin crystal knot to survey the device of high-temperature superconductor BSCCO terahertz emission, comprise interconnective main body 1 and main body 22, punch the hole at the correspondence position of main body 1 and main body 22 respectively, will surpass hemisphere silicon lens 1 and super hemisphere silicon lens 24 correspondences are fixed on main body 1 and main body 22 by the low temperature heat-conductive bonding agent.BSCCO5 to be measured is located at super hemisphere silicon lens one 3 outsides, and YBCO6 to be measured is located at super hemisphere silicon lens 24 outsides, and the center of the accurate lens of guaranteeing to become a partner.
In addition, can reserve some screws on main body 1 and main body 22, be used for installing elements such as applying copper circuit board, sub-miniature A connector.
Use in experiment and be grown on MgO twin crystal substrate the thick YBCO superconducting thin film of 100nm substrate and prepare YBCO/MgO twin crystal knot (size: 10mm * 10mm * 0.5mm, twin crystal crystal boundary angle 24o).The twin crystal scaffolding of finally preparing is wide by 1.5
μM, integrated planar-periodic logarithm antenna.
The BSCCO Intrinsic Josephson Junctions that experiment is used is prepared by two-sided knot preparation technology.Be of a size of 320
μM is long, and 60
μM is wide, and 1.2
μM is thick.This sample uses other method to test in advance, can know that this BSCCO maximum can give off approximately 25
μThe radiation of W, frequency is adjustable at 0.48THz ~ 0.52THz.
As shown in Figure 5, above-mentioned YBCO/MgO twin crystal knot is adhesive on a super hemisphere silicon lens by low temperature, aims at by the embodiment microscope that band collimates, make the middle junction zone position aim at the lens center.The BSCCO Intrinsic Josephson Junctions, is aimed at by embodying microscope on another super hemisphere silicon lens equally by the low temperature glue, makes the center of the accurate lens of becoming a partner.
Then whole device is arranged in the GM refrigeration machine, is cooled to 25K, finally record result as shown in Figure 6.In figure, curve 7 is illustrated in the IV curve of YBCO/MgO twin crystal knot when there is no terahertz emission, and curve 8 is illustrated in the IV curve of YBCO/MgO twin crystal knot under the BSCCO terahertz emission.Can very clearly see on twin crystal knot IV curve and produce a lot of Xia Piluo steps.Can see at most step the 7th time from the dV/dI curve.This shows, utilize device of the present invention, can successfully use YBCO/MgO twin crystal knot to detect the THz wave that BSCCO gives off.
Claims (4)
1. one kind is used the HTS YBCO twin crystal to tie the device of surveying high-temperature superconductor BSCCO terahertz emission, it is characterized in that: comprise interconnective main body one (1) and main body two (2), establish perforation at the correspondence position of described main body one (1) and main body two (2) respectively; Establish super hemisphere silicon lens one (3) and super hemisphere silicon lens two (4) in described perforation; BSCCO(5 to be measured) be located at super hemisphere silicon lens one (3) outside, and guarantee BSCCO(5) center of the accurate super hemisphere silicon lens one (3) of becoming a partner; YBCO(6 to be measured) be located at super hemisphere silicon lens two (4) outsides, and guarantee YBCO(6) center of the accurate super hemisphere silicon lens two (4) of becoming a partner.
2. use HTS YBCO twin crystal knot according to claim 1 is surveyed the device of high-temperature superconductor BSCCO terahertz emission, and it is characterized in that: described super hemisphere silicon lens one (3) and super hemisphere silicon lens two (4) all are fixed in perforation by the low temperature heat-conductive bonding agent.
3. use HTS YBCO twin crystal knot according to claim 1 is surveyed the device of high-temperature superconductor BSCCO terahertz emission, it is characterized in that: described main body one (1) and main body two (2) are made by red copper processing, electroplating gold on surface.
4. use HTS YBCO twin crystal knot according to claim 1 is surveyed the device of high-temperature superconductor BSCCO terahertz emission, it is characterized in that: described super hemisphere silicon lens one (3) is relative with the common axis of super hemisphere silicon lens two (4) and sphere.
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|---|---|---|---|
| CN2013100672150A CN103175609A (en) | 2013-03-04 | 2013-03-04 | Device using high-temperature superconducting YBCO (yttrium barium copper oxide) bicrystal junction for detecting terahertz radiation of high-temperature superconducting BSCCO (bismuth strontium calcium copper oxide) |
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|---|---|---|---|
| CN2013100672150A CN103175609A (en) | 2013-03-04 | 2013-03-04 | Device using high-temperature superconducting YBCO (yttrium barium copper oxide) bicrystal junction for detecting terahertz radiation of high-temperature superconducting BSCCO (bismuth strontium calcium copper oxide) |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052552A (en) * | 2014-06-13 | 2014-09-17 | 南京大学 | Large-diameter super-conduction weak-light receiver |
| CN105571712A (en) * | 2016-02-22 | 2016-05-11 | 南京大学 | Automatic portable terahertz radiation space distribution detector |
| CN112345083A (en) * | 2020-11-05 | 2021-02-09 | 南京工程学院 | High-temperature superconducting terahertz radiation source intelligent testing device based on different bias conditions |
| CN115764260A (en) * | 2022-11-17 | 2023-03-07 | 南通大学 | Butterfly antenna suitable for embedding meander line of superconducting series Josephson double-crystal junction |
| CN116223420A (en) * | 2023-01-10 | 2023-06-06 | 南通大学 | Terahertz gas detection system and method based on high-temperature superconducting YBCO bicrystal junction |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052552A (en) * | 2014-06-13 | 2014-09-17 | 南京大学 | Large-diameter super-conduction weak-light receiver |
| CN105571712A (en) * | 2016-02-22 | 2016-05-11 | 南京大学 | Automatic portable terahertz radiation space distribution detector |
| CN112345083A (en) * | 2020-11-05 | 2021-02-09 | 南京工程学院 | High-temperature superconducting terahertz radiation source intelligent testing device based on different bias conditions |
| CN112345083B (en) * | 2020-11-05 | 2021-08-31 | 南京工程学院 | High-temperature superconducting terahertz radiation source intelligent testing device based on different bias conditions |
| CN115764260A (en) * | 2022-11-17 | 2023-03-07 | 南通大学 | Butterfly antenna suitable for embedding meander line of superconducting series Josephson double-crystal junction |
| CN116223420A (en) * | 2023-01-10 | 2023-06-06 | 南通大学 | Terahertz gas detection system and method based on high-temperature superconducting YBCO bicrystal junction |
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Application publication date: 20130626 |