CN108683059A - The system and method for generating high-intensity broadband THz wave using liquid column - Google Patents
The system and method for generating high-intensity broadband THz wave using liquid column Download PDFInfo
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- CN108683059A CN108683059A CN201810587765.8A CN201810587765A CN108683059A CN 108683059 A CN108683059 A CN 108683059A CN 201810587765 A CN201810587765 A CN 201810587765A CN 108683059 A CN108683059 A CN 108683059A
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- 239000007788 liquid Substances 0.000 title claims abstract description 116
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000005855 radiation Effects 0.000 claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 230000010287 polarization Effects 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000004816 latex Substances 0.000 claims description 10
- 229920000126 latex Polymers 0.000 claims description 10
- 239000013078 crystal Substances 0.000 claims description 8
- 229910007709 ZnTe Inorganic materials 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical group [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 2
- 239000000571 coke Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 7
- 238000011160 research Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000003595 spectral effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S1/00—Masers, i.e. devices using stimulated emission of electromagnetic radiation in the microwave range
- H01S1/04—Masers, i.e. devices using stimulated emission of electromagnetic radiation in the microwave range liquid
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a kind of system and method generating high-intensity broadband THz wave using liquid column, which includes the laser being successively set in light path, spectroscope, chopper, the first off-axis parabolic mirror and liquid column, wherein：The focal length of first off-axis parabolic mirror is 1 inch, the direction of liquid column is straight down, laser is for emitting a horizontal polarization laser beam, horizontal polarization laser beam is by being divided into a branch of pump light and a branch of detection light after spectroscope, pump light passes through after being modulated by chopper focuses on liquid column by the first off-axis parabolic mirror, is to form one to give off the terahertz radiation source of high-intensity broadband THz wave at liquid column.Present invention application liquid column generates THz wave and generation efficiency is high, system composition is simple, it is at low cost to build, is easy maintenance, stability height, the blank in current high-intensity broadband THz wave generation technology field is compensated for, there is stronger scientific research and actual application value.
Description
Technical field
The present invention relates to THz wave technology fields, and high-intensity broadband is generated using liquid column in particular to a kind of
The system and method for THz wave.
Background technology
In recent years, with the research to terahertz emission source, a large amount of achievement in research is it has been proved that solid crystal, metal
Material, gas or plasma are good terahertz emission sources.However, using liquid especially liquid water or its etc. from
The achievement in research that daughter generates THz wave is very few.In fact, liquid water has been ground as the source of various electromagnetic waves
Study carefully more than 10 years.Such as：The non-linear process of the water included in cell, jet stream or drop is focused on by ultra-short pulse laser
Generate higher hamonic wave and white light.In addition, the dynamics of the liquid water of laser pulse radiation has been studied more than 20 years.It hinders
Liquid water may be because liquid water has very strong suction in Terahertz frequency range as the reason of terahertz emission source
Receive characteristic.Power absorption constant of the liquid water in 1 Terahertz is about 220cm-1, it is meant that 3.6 × 109The photon of Terahertz into
Entering in the moisture film of 1mm thickness can only radiate there are one photon, it can be seen that, photon loss is very big and terahertz generation is imitated
Rate is very low.
Invention content
The present invention provides a kind of system and method generating high-intensity broadband THz wave using liquid column, to generate height
Intensity broadband THz wave.
In order to achieve the above objectives, it is using what liquid column generated high-intensity broadband THz wave the present invention provides a kind of
System comprising laser, spectroscope, chopper, the first off-axis parabolic mirror and the liquid column being successively set in light path,
Wherein：
The focal length of first off-axis parabolic mirror is 1 inch,
The direction of the liquid column be straight down,
The laser is for emitting a horizontal polarization laser beam, after horizontal polarization laser beam is by the spectroscope
It is divided into a branch of pump light and a branch of detection light, pump light passes through after being modulated by the chopper to be reflected by first off axis paraboloid mirror
Mirror focuses on the liquid column, is to form one to give off the THz wave of high-intensity broadband THz wave at the liquid column
Radiation source.
In one embodiment of this invention, the laser is femto-second laser, and the chopping frequency of the chopper is 100
~300Hz.
In one embodiment of this invention, the liquid in the liquid column is water, inorganic solution or organic solution.
In one embodiment of this invention, the liquid in the liquid column is calcium chloride solution or carbon tetrachloride solution.
In one embodiment of this invention, a diameter of 0.2um of the liquid column.
In one embodiment of this invention, the liquid column is generated by a liquid column generation device, and the liquid column generates
Device includes liquid cell, water pump, nozzle, the first connecting tube and the second connecting tube, and first connecting tube is connected to the liquid
Between pond and the water pump, second connecting tube is connected between the water pump and the nozzle, and the water pump is for extracting
Liquid in the liquid cell is simultaneously pressurized it, and sprays the liquid column, the liquid in the liquid column by the nozzle
Body is back to the liquid cell.
In one embodiment of this invention, the water pump is the frequency-changing cyclone formula self-absorption electric pump that rated power is 750w, institute
It is latex hose to state the first connecting tube, and second connecting tube is the combination of metal connecting tube and latex hose, wherein latex is soft
The aperture of pipe is 3~10mm, and the aperture of metal connecting tube is 5~15mm, and the nozzle is aperture between 0.1~1mm
Aluminium alloy nozzle.
In one embodiment of this invention, the system for generating high-intensity broadband THz wave using liquid column further includes one too
Hertz wave detection system comprising the second off-axis parabolic mirror, silicon chip, third off-axis parabolic mirror, ZnTe crystal,
First convex lens, terahertz wave detector and the second convex lens, wherein：
The focal length of second off-axis parabolic mirror and the third off-axis parabolic mirror is 4 inches,
THz wave is pooled a branch of collimated light beam by second off-axis parabolic mirror, which passes through institute
State and be projected to the third off-axis parabolic mirror after silicon chip filtering and focus and formed a focus on light beam, the focus on light beam with pass through
Focused on jointly after ZnTe crystal again through first convex lens by the detection light beam of second convex lens focus, after pass through
By the terahertz wave detector detected intensity.
In one embodiment of this invention, the terahertz wave detector is self-balancing photodetector.
In one embodiment of this invention, terahertz radiation source is towards the different Terahertz of each angle radiation intensity in space
Wave is 65 ° of directions in radiation angle θ, and the maximum intensity of THz wave, radiation angle θ is defined as follows：
The direction for defining the laser that the first off axis paraboloid mirror is projected to liquid column is A, is directed toward from liquid column for receiving too
This direction of the device of Hertz wave is B, then the angle between A and B is radiation angle θ, defines -180 ° of θ≤180 ° ＜, defines A
Radiation angle θ is 0 ° when in the same direction with B, and radiation angle θ is 180 ° when A and B is reversed, and definition is that 0 ° of direction rotates clockwise from radiation angle θ
To radiation angle θ be radiation angle θ between 180 ° of directions be otherwise be negative just.
The present invention also provides a kind of high-intensity broadband THz wave being generated using liquid column applied in above system
Method comprising following steps：
S1：The laser emits a horizontal polarization laser beam；
S2：The horizontal polarization laser beam is by being divided into a branch of pump light and a branch of detection light after the spectroscope；
S3：The pump light is described through being focused on by first off-axis parabolic mirror after being modulated by the chopper
Liquid column；
S4：Terahertz radiation source is formed at the liquid column and gives off high-intensity broadband THz wave.
Liquid is applied in the system and method innovation provided by the invention that high-intensity broadband THz wave is generated using liquid column
Scapus generation THz wave and generation efficiency height, system composition is simple, it is at low cost to build, is easy maintenance, stability height, makes up
The blank in current high-intensity broadband THz wave generation technology field has stronger scientific research and actual application value.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the composition schematic diagram of the system provided by the invention that high-intensity broadband THz wave is generated using liquid column
(vertical view)；
Fig. 2 is the composition schematic diagram (side view) of the liquid column generation device in the present invention；
Fig. 3 is the time domain waveform for the THz wave that the present invention generates；
Fig. 4 is the spectrogram for the THz wave that the present invention generates；
Fig. 5 is the numeric distribution figure of the radiation angle θ from vertical view.
Reference sign：1- lasers；2- spectroscopes；3- choppers；The first off-axis parabolic mirrors of 4-；5- liquid
Column；51- liquid cells；52- water pumps；53- nozzles；The first connecting tubes of 54-；The second connecting tubes of 55-；6- THz wave detection systems；
The second off-axis parabolic mirrors of 61-；62- silicon chips；63- third off-axis parabolic mirrors；64-ZnTe crystal；65- first is convex
Lens；66- terahertz wave detectors；The second convex lenses of 67-.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of not making the creative labor
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 is the composition schematic diagram of the system provided by the invention that high-intensity broadband THz wave is generated using liquid column
(vertical view), Fig. 2 are the composition schematic diagram (side view) of the liquid column generation device in the present invention, as shown in Figure 1 and Figure 2, this hair
Bright offer using liquid column generate high-intensity broadband THz wave system include the laser 1 being successively set in light path,
Spectroscope 2, chopper 3, the first off-axis parabolic mirror 4 and liquid column 5, wherein：
The focal length of first off-axis parabolic mirror 4 is 1 inch,
The direction of liquid column 5 is that straight down, should be fixed for continuous, stable, flow velocity, the unconverted liquid of shape
Column.
Laser 1 is for emitting a horizontal polarization laser beam, and horizontal polarization laser beam after spectroscope 2 by being divided into one
Beam pump light and a branch of detection light, pump light are passed through by 4 focusing mirror of the first off axis paraboloid mirror after being modulated by chopper 3 in liquid
Column 5, i.e. the terahertz radiation source of high-intensity broadband THz wave can be given off by forming one at liquid column 5.
Laser 1 in the present invention for example can be femto-second laser, and the chopping frequency of chopper 3 for example can be 100
~300Hz.
In the present invention, the liquid in liquid column 5 can be water, inorganic solution (such as calcium chloride solution) or organic solution
(such as carbon tetrachloride solution).
In one embodiment of this invention, the diameter of liquid column 5 can be for example 0.2um, but invention is not limited thereto,
The diameter of liquid column can be adjusted according to actual needs.
As shown in Fig. 2, in the present embodiment, liquid column 5 is generated by a liquid column generation device, and liquid column generation device includes
Liquid cell 51, water pump 52, nozzle 53, the first connecting tube 54 and the second connecting tube 55, the first connecting tube 54 are connected to liquid cell 51
Between water pump 52, the second connecting tube 55 is connected between water pump 52 and nozzle 53, and water pump 52 is for extracting in liquid cell 51
Liquid is simultaneously pressurized it, and sprays liquid column 5 by nozzle 53, the liquid reflux in liquid column 5 to liquid cell 51.
In Fig. 2, water pump 52 for example can be the frequency-changing cyclone formula self-absorption electric pump that rated power is 750w, the first connecting tube 54
Can be latex hose, the second connecting tube 55 can be that (wherein metal connecting tube leans on for the combination of metal connecting tube and latex hose
Nearly water pump, latex hose is close to nozzle), wherein the aperture of latex hose is 3~10mm, the aperture of metal connecting tube is 5~
15mm, nozzle 53 are aluminium alloy nozzle of the aperture between 0.1~1mm.
In the present invention, terahertz radiation source is towards the different THz wave of each angle radiation intensity in space, in radiation angle θ
For 65 ° of directions, the maximum intensity of THz wave, radiation angle θ is defined as follows：
The direction for defining the laser that the first off axis paraboloid mirror is projected to liquid column is A, is directed toward from liquid column for receiving too
This direction of the device of Hertz wave is B, then the angle between A and B is radiation angle θ, defines -180 ° of θ≤180 ° ＜, defines A
Radiation angle θ is 0 ° when in the same direction with B, and radiation angle θ is 180 ° when A and B is reversed, and definition is that 0 ° of direction rotates clockwise from radiation angle θ
To radiation angle θ be radiation angle θ between 180 ° of directions be otherwise be negative just.Thus definition is it is found that the radiation angle θ in Fig. 1 is just
Value.Fig. 5 is the numeric distribution figure of the radiation angle θ from vertical view, as shown in figure 5, on vertical view shown in FIG. 1, -180 ° of ＜
θ≤180 °, when radiation angle θ is 65 °, the maximum intensity of THz wave, when Fig. 3 and i.e. corresponding radiation angle θ shown in Fig. 4 are 65 °
THz wave.
As shown in Figure 1, the system provided by the invention for generating high-intensity broadband THz wave using liquid column can also be into
One step includes a THz wave detection system 6 comprising the second off-axis parabolic mirror 61, silicon chip 62, the off-axis parabolic of third
Face speculum 63, ZnTe crystal 64, the first convex lens 65, terahertz wave detector 66 and the second convex lens 67, wherein：
The focal length of second off-axis parabolic mirror 61 and third off-axis parabolic mirror 63 is 4 inches,
THz wave is pooled a branch of collimated light beam by the second off-axis parabolic mirror 61, which passes through silicon chip
After 62 filtering third off-axis parabolic mirror 63 is projected to focus and form a focus on light beam, the focus on light beam with via second
The detection light beam that convex lens 67 focuses is focused on jointly again by the first convex lens 65 after ZnTe crystal 64, later via Terahertz
66 detected intensity of wave detector.
In Fig. 2, terahertz wave detector 66 for example can be self-balancing photodetector.
The present invention also provides a kind of high-intensity broadband THz wave being generated using liquid column applied in Fig. 1, Fig. 2
Method comprising following steps：
S1：Laser 1 emits a horizontal polarization laser beam；
S2：Horizontal polarization laser beam is by being divided into a branch of pump light and a branch of detection light after spectroscope 2；
S3：Pump light passes through after being modulated by chopper 3 and focuses on liquid column 5 by the first off-axis parabolic mirror 4；
S4：Terahertz radiation source is formed at liquid column 5 and gives off high-intensity broadband THz wave.
It should be noted that the signal lights such as ' light beam ' mentioned in the present invention are propagated in same level, namely
For the signal light between any two element in Fig. 1 in same level, the THz wave of generation also is located at same level
It is received in face.
Fig. 3 is the time domain waveform for the THz wave that the present invention generates, and Fig. 4 is the frequency spectrum for the THz wave that the present invention generates
Scheme, the time delay in Fig. 3 was referred to through the time difference between the pump light after spectroscope 2 and detection light, can by Fig. 3, Fig. 4
Know, strong 10 times of the THz wave intensity or more of the amplitude ratio Same Efficieney pump air generation of THz wave；The frequency of THz wave
Spectral width is up to 3THz, it can thus be concluded that the present invention can generate high-intensity broadband terahertz emission source, be easy to carry out spectral measurement and
The practical application of imaging.
Liquid is applied in the system and method innovation provided by the invention that high-intensity broadband THz wave is generated using liquid column
Scapus generation THz wave and generation efficiency height, system composition is simple, it is at low cost to build, is easy maintenance, stability height, makes up
The blank in current high-intensity broadband THz wave generation technology field has stronger scientific research and actual application value.
One of ordinary skill in the art will appreciate that：Attached drawing is the schematic diagram of one embodiment, module in attached drawing or
Flow is not necessarily implemented necessary to the present invention.
One of ordinary skill in the art will appreciate that：The module in device in embodiment can describe to divide according to embodiment
It is distributed in the device of embodiment, respective change can also be carried out and be located in one or more devices different from the present embodiment.On
The module for stating embodiment can be merged into a module, can also be further split into multiple submodule.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
To modify to the technical solution recorded in previous embodiment or equivalent replacement of some of the technical features；And
These modifications or replacements, the spirit and model of technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (11)
1. a kind of system generating high-intensity broadband THz wave using liquid column, which is characterized in that including being successively set on light
Laser, spectroscope, chopper, the first off-axis parabolic mirror and the liquid column of road, wherein：
The focal length of first off-axis parabolic mirror is 1 inch,
The direction of the liquid column be straight down,
The laser is for emitting a horizontal polarization laser beam, and horizontal polarization laser beam after the spectroscope by being divided into
A branch of pump light and a branch of detection light, pump light passes through after being modulated by the chopper to be gathered by first off-axis parabolic mirror
I.e. the terahertz radiation of high-intensity broadband THz wave can be given off to coke by forming one at the liquid column, the liquid column
Source.
2. the system according to claim 1 for generating high-intensity broadband THz wave using liquid column, which is characterized in that institute
It is femto-second laser to state laser, and the chopping frequency of the chopper is 100~300Hz.
3. the system according to claim 1 for generating high-intensity broadband THz wave using liquid column, which is characterized in that institute
It is water, inorganic solution or organic solution to state the liquid in liquid column.
4. the system according to claim 3 for generating high-intensity broadband THz wave using liquid column, which is characterized in that institute
It is calcium chloride solution or carbon tetrachloride solution to state the liquid in liquid column.
5. the system according to claim 1 for generating high-intensity broadband THz wave using liquid column, which is characterized in that institute
State a diameter of 0.2um of liquid column.
6. the system according to claim 1 for generating high-intensity broadband THz wave using liquid column, which is characterized in that institute
It states liquid column to be generated by a liquid column generation device, the liquid column generation device includes liquid cell, water pump, nozzle, the first company
It takes over and is connected between the liquid cell and the water pump with the second connecting tube, first connecting tube, second connecting tube
It is connected between the water pump and the nozzle, the water pump is for extracting the liquid in the liquid cell and increasing to it
Pressure, and the liquid column is sprayed by the nozzle, the liquid reflux in the liquid column to the liquid cell.
7. the system according to claim 6 for generating high-intensity broadband THz wave using liquid column, which is characterized in that institute
It is the frequency-changing cyclone formula self-absorption electric pump that rated power is 750w to state water pump, and first connecting tube is latex hose, described second
Connecting tube is the combination of metal connecting tube and latex hose, wherein the aperture of latex hose is 3~10mm, metal connecting tube
Aperture is 5~15mm, and the nozzle is aluminium alloy nozzle of the aperture between 0.1~1mm.
8. the system according to claim 1 for generating high-intensity broadband THz wave using liquid column, which is characterized in that also
Including a THz wave detection system comprising the second off-axis parabolic mirror, silicon chip, third off-axis parabolic mirror,
ZnTe crystal, the first convex lens, terahertz wave detector and the second convex lens, wherein：
The focal length of second off-axis parabolic mirror and the third off-axis parabolic mirror is 4 inches,
THz wave is pooled a branch of collimated light beam by second off-axis parabolic mirror, which passes through the silicon
It is projected to the third off-axis parabolic mirror after piece filtering and focuses and formed a focus on light beam, the focus on light beam and via institute
The detection light beam for stating the second convex lens focus is focused on jointly again by first convex lens after ZnTe crystal, later via institute
State terahertz wave detector detected intensity.
9. the system according to claim 8 for generating high-intensity broadband THz wave using liquid column, which is characterized in that institute
It is self-balancing photodetector to state terahertz wave detector.
10. the system according to claim 1 for generating high-intensity broadband THz wave using liquid column, which is characterized in that
Terahertz radiation source is 65 ° of directions, Terahertz in radiation angle θ towards the different THz wave of each angle radiation intensity in space
The maximum intensity of wave, radiation angle θ are defined as follows：
The direction for defining the laser that the first off axis paraboloid mirror is projected to liquid column is A, is directed toward from liquid column for receiving Terahertz
This direction of the device of wave is B, then the angle between A and B is radiation angle θ, defines -180 ° of θ≤180 ° ＜, and it is same to define A and B
To when radiation angle θ be 0 °, radiation angle θ is 180 ° when A and B is reversed, and definition is that 0 ° of direction is clockwise to radiation from radiation angle θ
Angle θ be the radiation angle θ between 180 ° of directions be otherwise be negative just.
11. generating high-intensity broadband too using liquid column in a kind of system applied to any one of claims 1 to 10
The method of Hertz wave, which is characterized in that include the following steps：
S1：The laser emits a horizontal polarization laser beam；
S2：The horizontal polarization laser beam is by being divided into a branch of pump light and a branch of detection light after the spectroscope；
S3：The pump light passes through after being modulated by the chopper and focuses on the liquid by first off-axis parabolic mirror
Column；
S4：Terahertz radiation source is formed at the liquid column and gives off high-intensity broadband THz wave.
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| CN109999360A (en) * | 2019-03-01 | 2019-07-12 | 钟海军 | A kind of Terahertz cell physiotherapy equipment |
| CN110048292A (en) * | 2019-05-20 | 2019-07-23 | 首都师范大学 | A kind of system and method generating enhancing THz wave using dual-beam pumping liquid |
| CN111431014A (en) * | 2020-03-17 | 2020-07-17 | 昆明理工大学 | Device and method for exciting terahertz waves by focusing laser pulses on micro-droplets |
| CN114018818A (en) * | 2021-12-16 | 2022-02-08 | 昆明理工大学 | Liquid terahertz source medium regulation and control integrated device |
| CN114136915A (en) * | 2021-11-05 | 2022-03-04 | 清华大学 | System and method for generating broadband terahertz waves with any polarization angle |
| CN114199376A (en) * | 2021-11-23 | 2022-03-18 | 首都师范大学 | System and method for coherent detection of broadband strong terahertz waves by using metal nanoparticle solution |
| CN115173192A (en) * | 2022-06-30 | 2022-10-11 | 首都师范大学 | System and method for representing terahertz wave beam spatial distribution by using liquid column as probe |
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