CN108550509B - A kind of electromagenetic wave radiation system and electromagenetic wave radiation method - Google Patents
A kind of electromagenetic wave radiation system and electromagenetic wave radiation method Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
- H01J3/02—Electron guns
- H01J3/027—Construction of the gun or parts thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
- H01J3/02—Electron guns
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
- H01J3/02—Electron guns
- H01J3/021—Electron guns using a field emission, photo emission, or secondary emission electron source
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Abstract
This application discloses a kind of electromagenetic wave radiation system and electromagenetic wave radiation methods, wherein, the electromagenetic wave radiation system infuses transmitting equipment to rectangular raster periodically launching electronics group by electronics, so that electron cloud periodically skims over the first surface of the rectangular raster, the surface wave on the rectangular raster is motivated, the electron cloud will be modulated by the surface wave, so that generating several small electron clouds inside each electron cloud, finally formed electron cloud will generate relevant Smith-Purcell radiation in grating upper half-space.In these relevant Smith-Purcell radiation of generation, its radiation frequency is related to the tranmitting frequency of the electron cloud, therefore it can pass through the tranmitting frequency of the adjusting electron cloud, the control for realizing the radiation frequency of the relevant Smith-Purcell radiation to generation, may be implemented the purpose of radiation frequency covering 0.6THz-1.5THz range.In addition, radiating using the Smith-Purcell that the electromagenetic wave radiation system can disposably generate multiple frequencies, can meet the needs of multiple applications simultaneously.
Description
Technical field
This application involves electromagnetic technology fields, more specifically to a kind of electromagenetic wave radiation system and electromagenetic wave radiation
Method.
Background technique
Wavelength millimeter or submillimeter level, frequency terahertz wave band electromagnetic wave in life science, material science, high speed
The numerous areas such as communication and national security have broad application prospects, and are the hot spots of current domestic and international researcher common concern
Research topic.The electromagenetic wave radiation of this wave band is the basis for developing Terahertz Technology.
The Smith-Purcell of relevant Smith-Purcell radiation effect based on charged particle excitation grating generation is certainly
By being expected to develop into work when electronic laser in the important electromagnetic radiation source of Terahertz frequency range.Traditional Smith-Purcell is certainly
By electronic laser, by continuous electronic note and one section of grating excitation, specifically: electronics note is on optical grating construction surface and reversed slow wave
Interaction makes continuous electronic note that clustering occur, forms the electron cloud of series of periodic arrangement, these electron clouds are in grating table
Face generates relevant Smith-Purcell radiation, and radiation frequency is the positive integer times of electron cloud clustering frequency, i.e. harmonic wave.Radiation is strong
Degree sharply declines with the raising of frequency multiple, and therefore, traditional Smith-Purcell free-electron laser is typically only capable to generate
Frequency is the electromagnetic radiation of clustering frequency twice (i.e. second harmonic).Radiation frequency is difficult to reach higher Terahertz frequency range (ratio
If radiation frequency is in 0.5THz or more).
Summary of the invention
In order to solve the above technical problems, this application provides a kind of electromagenetic wave radiation system and electromagenetic wave radiation method, with
Realize the purpose for generating the Smith-Purcell radiation of terahertz wave band.
To realize the above-mentioned technical purpose, the embodiment of the present application provides following technical solution:
A kind of electromagenetic wave radiation system, comprising: rectangular raster and electronics note transmitting equipment, wherein；
The first surface of the rectangular raster has periodic structure；
The electronics note transmitting equipment is used for flat to rectangular raster transmitting and the first surface every preset time
Capable electron cloud, to have motivated the surface wave on the rectangular raster, the electron cloud will be modulated by the surface wave, so that often
Several small electron clouds are generated inside a electron cloud, finally formed electron cloud will generate relevant Smith- in grating upper half-space
Purcell radiation；
The tranmitting frequency of the electron cloud of the electronics note transmitting equipment transmitting is the inverse of the preset time.
Optionally, the electronics note transmitting equipment is photoinjectors.
Optionally, the photoinjectors include: photocathode and laser transmitting set；Wherein,
The laser transmitting set emits laser pulse to the photocathode for each preset time, so that the time
Pole generates the electron cloud under the excitation of the laser pulse and is emitted from the surface of emission of the photocathode.
Optionally, the cross section of the surface of emission of the photocathode is perpendicular to first plane, and the shape of the cross section
Shape is rectangle.
Optionally, the rectangle is made of the long side for being parallel to first direction with the short side for being parallel to second direction；
The first direction is perpendicular to the second direction, and the first direction is parallel with first plane.
Optionally, the ratio of the long side length and bond length is greater than or equal to 10.
A kind of electromagenetic wave radiation method, comprising:
Electromagenetic wave radiation system is provided, the electromagenetic wave radiation system is electromagenetic wave radiation system described in any of the above embodiments
System；
Using the electromagenetic wave radiation system electronics note transmitting equipment to the rectangular raster periodical launch with it is described
The parallel electron cloud of the first surface of rectangular raster, to have motivated the surface wave on the rectangular raster, the electron cloud will be by
The surface wave modulation, so that generating several small electron clouds inside each electron cloud, finally formed electron cloud will be on grating
Half space generates relevant Smith-Purcell radiation；
The tranmitting frequency of the electron cloud of the electronics note transmitting equipment transmitting is the inverse of the preset time.
Optionally, the electron cloud motivates the rectangular raster, generates the process packet of relevant Smith-Purcell radiation
It includes:
The electron cloud motivates the periodic structure of the first surface of the rectangular raster to generate surface wave；
The electron cloud and the surface wave interaction generate electron bunching, in the inside of each electron cloud
Multiple small electron clouds are generated, clustering frequency is the positive integer times of the tranmitting frequency of the electron cloud of electron-emitting device transmitting；
After the beam group factor of beam the group factor and the electron cloud of the small electron cloud be superimposed, generates a series of be mixed and divide
The frequency of amount, the mixed components meets the first preset formula；
Electron cloud comprising the mixed components forms the relevant of multiple and different frequencies on the rectangular raster surface
Smith-Purcell radiation；
First preset formula are as follows: f=pf1+qf0；Wherein, f is the frequency of mixed components, f1For the clustering frequency,
f0For the tranmitting frequency of the electron cloud, p, q are nonzero integer.
It can be seen from the above technical proposal that the embodiment of the present application provides a kind of electromagenetic wave radiation system and electromagnetism amplitude
Shooting method, wherein the electromagenetic wave radiation system infuses transmitting equipment to rectangular raster periodically launching electronics group by electronics,
So that electron cloud periodically skims over the first surface of the rectangular raster, when electron cloud skims over the first table of the rectangular raster
When face, the first surface of rectangular raster generates surface wave, and the surface wave interaction of electron cloud and generation generates electron bunching,
To generate multiple small electron clouds in the inside of each electron cloud；Then beam group's factor of the small electron cloud and the electron cloud
After the superposition of beam group's factor, a series of mixed components are generated；It and include the electron cloud of these mixed components on rectangular raster surface
Form the relevant Smith-Purcell radiation of multiple and different frequencies.In these relevant Smith-Purcell radiation of generation,
Its radiation frequency is related to the tranmitting frequency of the electron cloud, thus can by adjusting the tranmitting frequency of the electron cloud,
Radiation frequency covering 0.6THz- may be implemented in the control for realizing the radiation frequency of the relevant Smith-Purcell radiation to generation
The purpose of 1.5THz range.
In addition, radiated using the Smith-Purcell that the electromagenetic wave radiation system can disposably generate multiple frequencies,
Can meet the needs of multiple applications simultaneously.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of application for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram for electromagenetic wave radiation system that one embodiment of the application provides；
Fig. 2 is a kind of structural schematic diagram for electromagenetic wave radiation system that another embodiment of the application provides；
Fig. 3 is the schematic diagram of the section structure of the Fig. 2 along AA ' line；
Fig. 4 be the electron cloud of electromagenetic wave radiation system exit that is provided using another embodiment of the application with rectangle
Effect diagram after the surface wave interaction of the first surface of grating；
Fig. 5 is the flat metal square that the electromagenetic wave radiation system emulation provided using another embodiment of the application is obtained
The transmitted spectrum of shape grating upper half-space；
Fig. 6 is a kind of flow diagram for electromagenetic wave radiation method that one embodiment of the application provides；
Fig. 7 is that the electron cloud that one embodiment of the application provides motivates the rectangular raster, generates relevant Smith-
The flow diagram of the process of Purcell radiation.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
The embodiment of the present application provides a kind of electromagenetic wave radiation system, as shown in Figure 1, comprising: rectangular raster 30 and electronics
Note transmitting equipment 10, wherein；
The first surface of the rectangular raster 30 has periodic structure；
The electronics note transmitting equipment 10 is used to emit and first table every preset time to the rectangular raster 30
The parallel electron cloud 20 in face, to have motivated the surface wave on the rectangular raster, the electron cloud 20 will be by the surface wave tune
System, so that generating several small electron clouds inside each electron cloud 20, finally formed electron cloud will be generated in grating upper half-space
Relevant Smith-Purcell radiation 40；
The tranmitting frequency of the electron cloud of the electronics note transmitting equipment transmitting is the inverse of the preset time.
The electromagenetic wave radiation system infuses transmitting equipment 10 to the periodically launching electronics group of rectangular raster 30 by electronics
20, so that electron cloud 20 periodically skims over the first surface of the rectangular raster 30, when electron cloud 20 skims over the rectangular light
When the first surface of grid 30, the first surface of rectangular raster 30 generates surface wave, electron cloud 20 and the surface wave phase interaction generated
With generation electron bunching, to generate multiple small electron clouds in the inside of each electron cloud 20, the clustering frequency of electron bunching is electricity
The integral multiple of the tranmitting frequency of son group 20, the size of each small electron cloud are less than the size of the electron cloud 20；
Then after the beam group factor of beam the group factor and the electron cloud 20 of the small electron cloud is superimposed, generation is a series of
The frequency of mixed components, these mixed components meets the first preset formula: f=pf1+qf0；Wherein, f is the frequency of mixed components,
f1For the clustering frequency, f0For the tranmitting frequency of the electron cloud 20, p, q are nonzero integer；
It and include that the electron clouds 20 of these mixed components forms the relevant of multiple and different frequencies on 30 surface of rectangular raster
Smith-Purcell radiation 40.In these relevant Smith-Purcell radiation 40 of generation, radiation frequency with it is described
The tranmitting frequency of electron cloud 20 is related, therefore can realize the phase to generation by the tranmitting frequency of the adjusting electron cloud 20
Radiation frequency covering 0.6THz-1.5THz range may be implemented in the control of the radiation frequency of dry Smith-Purcell radiation 40
Purpose.
In addition, being radiated using the Smith-Purcell that the electromagenetic wave radiation system can disposably generate multiple frequencies
40, can meet the needs of multiple applications, the radiation frequency of these Smith-Purcell radiation 40 of generation and radiation side simultaneously
40 relationships are radiated to Smith-Purcell is met:
Wherein, λ indicates the radiation wavelength of Smith-Purcell radiation 40 in a vacuum, and L is the sky of the rectangular raster 30
Between the period, β is the ratio of particle rapidity and vacuum light speed in electron cloud 20, and n is negative integer, and θ is Smith-Purcell radiation 40
Radiation direction and electron cloud 20 in Particles Moving direction angle.
It should be noted that the coordinate system in Fig. 1 is that the right hand established using the direction of motion of electron cloud 20 as x-axis forward direction is sat
Mark system.
On the basis of the above embodiments, in one embodiment of the application, the electronics note transmitting equipment 10 is light
Cathode electron gun.
Optionally, as shown in Fig. 2, the photoinjectors include: photocathode 12 and laser transmitting set 11；Wherein,
The laser transmitting set 11 emits laser pulse to the photocathode 12 for each preset time, so that described
Photocathode 12 generates the electron cloud 20 under the excitation of the laser pulse and is emitted from the surface of emission of the photocathode 12.
The photocathode 12 is prepared using photoelectric material, to realize the function for generating electron cloud 20 under the excitation of laser pulse
Energy.In the present embodiment, can significantly find out, the tranmitting frequency of laser pulse is equal to the tranmitting frequency of electron cloud 20, therefore
The control of the tranmitting frequency to electron cloud 20 can be realized by adjusting the tranmitting frequency of laser pulse.
In order to generate the electron cloud 20 for along the cross sectional shape perpendicular to first plane being rectangle, it is preferable that the light
The cross section of the surface of emission of cathode is perpendicular to first plane, and the shape of the cross section is rectangle.
With reference to Fig. 3, Fig. 3 is the diagrammatic cross-section of the AA ' line in Fig. 2, and the rectangle is by being parallel to the length of first direction
Side and the short side for being parallel to second direction are constituted；
The first direction is perpendicular to the second direction, and the first direction is parallel with first plane.
Coordinate system in Fig. 2 and Fig. 3 is identical as the coordinate system in Fig. 1, and the x-axis extending direction in Fig. 3 is described first
Direction, y-axis extending direction are the second direction.
Preferably, the ratio of the long side length and bond length is greater than or equal to 10.
By the ratio of long side length and bond length be arranged biggish purpose be generate cross section long side length it is longer
Electron cloud 20 avoids a large amount of electron cloud 20 can not be with so that electron cloud 20 and the contact area of rectangular raster 30 increase as far as possible
The case where rectangular raster 30 contacts and generates waste.
The electromagenetic wave radiation system that optimization obtains is given below, the rectangular raster 30 is flat metal rectangular raster 30,
Its screen periods is 0.4mm, and gap width is 0.2mm between grating comb teeth, and grating comb teeth depth is 0.3mm；Electronics note transmitting is set
Standby 10 be photoinjectors, and electron energy is 100 kilo electron volts, and the tranmitting frequency of electron cloud 20 is 86GHz, electron cloud
20 cross sectional dimensions is 0.1mm × 1mm.
With reference to Fig. 4, Fig. 4 be using the electromagenetic wave radiation system exit of above structure electron cloud 20 with rectangular raster 30
First surface surface wave interaction after effect diagram；Abscissa in Fig. 4 indicates small electron cloud along the x-axis direction
Position coordinates, ordinate are the electron energy at the position, and unit is kilo electron volt；Figure 4, it is seen that in electron cloud
After 20 with surface wave interaction, the energy of a charge inside electron cloud 20 has obtained effectively modulating, that is, produce size compared with
Small small electron cloud.
With reference to Fig. 5, Fig. 5 is the transmitted spectrum for 30 upper half-space of flat metal rectangular raster that emulation obtains, the cross in Fig. 5
Coordinate is the radiation frequency of Smith-Purcell radiation, and unit is Terahertz, and ordinate is normalization field strength；It can be with from Fig. 5
Find out, has obtained a series of spoke of the biggish relevant Smith-Purcell radiation 40 of intensity using the electromagenetic wave radiation system
Peak value is penetrated, frequency changes from 0.6THz to 1.5THz.
Electromagenetic wave radiation method provided by the present application is described below, electromagenetic wave radiation method described below with it is upper
The electromagenetic wave radiation system of text description can correspond to each other reference.
Correspondingly, the embodiment of the present application provides a kind of electromagenetic wave radiation method, as shown in Figure 6, comprising:
S101: providing electromagenetic wave radiation system, and the electromagenetic wave radiation system is electromagnetism described in any of the above-described embodiment
Wave radiation system；
S102: using the electromagenetic wave radiation system electronics note transmitting equipment to the rectangular raster periodical launch with
The parallel electron cloud of the first surface of the rectangular raster, to have motivated the surface wave on the rectangular raster, the electron cloud
It will be modulated by the surface wave, so that generating several small electron clouds inside each electron cloud, finally formed electron cloud will be in light
Grid upper half-space generates relevant Smith-Purcell radiation；
The tranmitting frequency of the electron cloud of the electronics note transmitting equipment transmitting is the inverse of the preset time.
The electromagenetic wave radiation method using electronics note transmitting equipment to rectangular raster periodically launching electronics group,
So that electron cloud periodically skims over the first surface of the rectangular raster, when electron cloud skims over the first table of the rectangular raster
When face, the first surface of rectangular raster generates surface wave, and the surface wave interaction of electron cloud and generation generates electron bunching,
To generate multiple small electron clouds in the inside of each electron cloud, the clustering frequency of electron bunching is the whole of the tranmitting frequency of electron cloud
Several times, the size of each small electron cloud are less than the size of the electron cloud；
Then after the beam group factor of beam the group factor and the electron cloud of the small electron cloud be superimposed, generation is a series of to be mixed
The frequency of frequency component, these mixed components meets the first preset formula: f=pf1+qf0；Wherein, f is the frequency of mixed components, f1
For the clustering frequency, f0For the tranmitting frequency of the electron cloud, p, q are nonzero integer；
It and include that the electron clouds of these mixed components forms the relevant Smith- of multiple and different frequencies on rectangular raster surface
Purcell radiation.In these relevant Smith-Purcell radiation of generation, hair of the radiation frequency with the electron cloud
Frequency dependence is penetrated, therefore the relevant Smith-Purcell to generation can be realized by the tranmitting frequency of the adjusting electron cloud
The purpose of radiation frequency covering 0.6THz-1.5THz range may be implemented in the control of the radiation frequency of radiation.
In addition, radiated using the Smith-Purcell that the electromagenetic wave radiation system can disposably generate multiple frequencies,
Can meet the needs of multiple applications simultaneously, the radiation frequency and radiation direction of these Smith-Purcell radiation of generation are full
Sufficient Smith-Purcell radiates relationship:
Wherein, λ indicates that the radiation wavelength of Smith-Purcell radiation in a vacuum, L are the space weeks of the rectangular raster
Phase, β are the ratio of particle rapidity and vacuum light speed in electron cloud, and n is negative integer, and θ is the radiation side of Smith-Purcell radiation
To the angle with Particles Moving direction in electron cloud.
Specifically, as shown in fig. 7, the electron cloud motivates the rectangular raster, relevant Smith-Purcell radiation is generated
Process include:
S201: the electron cloud motivates the periodic structure of the first surface of the rectangular raster to generate surface wave；
S202: the electron cloud and the surface wave interaction generate electron bunching, in each electron cloud
Inside generates multiple small electron clouds, and clustering frequency is the positive integer of the tranmitting frequency of the electron cloud of electron-emitting device transmitting
Times；
S203: after the beam group factor of beam the group factor and the electron cloud of the small electron cloud is superimposed, generation is a series of
The frequency of mixed components, the mixed components meets the first preset formula；
S204: the electron cloud comprising the mixed components forms the relevant of multiple and different frequencies on the rectangular raster surface
Smith-Purcell radiation；
First preset formula are as follows: f=pf1+qf0；Wherein, f is the frequency of mixed components, f1For the clustering frequency,
f0For the tranmitting frequency of the electron cloud, p, q are nonzero integer.
The simulation result that electromagenetic wave radiation is generated using the electromagenetic wave radiation system after optimization, the electricity after optimization is given below
In electromagnetic wave radiation system, the rectangular raster is flat metal rectangular raster, and screen periods 0.4mm is stitched between grating comb teeth
Gap width is 0.2mm, and grating comb teeth depth is 0.3mm；Electronics note transmitting equipment is photoinjectors, and electron energy is
100 kilo electron volts, the tranmitting frequency of electron cloud are 86GHz, and the cross sectional dimensions of electron cloud is 0.1mm × 1mm.
With reference to Fig. 4, Fig. 4 is to be the of rectangular raster using the electron cloud of the electromagenetic wave radiation system exit of above structure
Effect diagram after the surface wave interaction on one surface；Figure 4, it is seen that in electron cloud and surface wave interaction
After, the energy of a charge inside electron cloud has obtained effectively modulating, that is, produces the lesser small electron cloud of size.
With reference to Fig. 5, Fig. 5 is the transmitted spectrum of flat metal rectangular raster upper half-space that emulation obtains, can be with from Fig. 5
Find out, has obtained a series of radiation of the biggish relevant Smith-Purcell radiation of intensity using the electromagenetic wave radiation system
Peak value, frequency change from 0.6THz to 1.5THz.
In conclusion the embodiment of the present application provides a kind of electromagenetic wave radiation system and electromagenetic wave radiation method, wherein institute
It states electromagenetic wave radiation system and transmitting equipment is infused to rectangular raster periodically launching electronics group, so that the electron cloud period by electronics
The first surface for skimming over to property the rectangular raster, when electron cloud skims over the first surface of the rectangular raster, rectangular raster
First surface generate surface wave, the surface wave interaction of electron cloud and generation, generate electron bunching, in each electron cloud
Inside generate multiple small electron clouds, the clustering frequency of electron bunching is the integral multiple of the tranmitting frequency of electron cloud, each described
The size of small electron cloud is less than the size of the electron cloud；
Then after the beam group factor of beam the group factor and the electron cloud of the small electron cloud be superimposed, generation is a series of to be mixed
The frequency of frequency component, these mixed components meets the first preset formula: f=pf1+qf0；Wherein, f is the frequency of mixed components, f1
For the clustering frequency, f0For the tranmitting frequency of the electron cloud, p, q are nonzero integer；
It and include that the electron clouds of these mixed components forms the relevant Smith- of multiple and different frequencies on rectangular raster surface
Purcell radiation.In these relevant Smith-Purcell radiation of generation, hair of the radiation frequency with the electron cloud
Frequency dependence is penetrated, therefore the relevant Smith-Purcell to generation can be realized by the tranmitting frequency of the adjusting electron cloud
The purpose of radiation frequency covering 0.6THz-1.5THz range may be implemented in the control of the radiation frequency of radiation.
In addition, radiated using the Smith-Purcell that the electromagenetic wave radiation system can disposably generate multiple frequencies,
Can meet the needs of multiple applications simultaneously, the radiation frequency and radiation direction of these Smith-Purcell radiation of generation are full
Sufficient Smith-Purcell radiates relationship:
Wherein, λ indicates that the radiation wavelength of Smith-Purcell radiation in a vacuum, L are the space weeks of the rectangular raster
Phase, β are the ratio of particle rapidity and vacuum light speed in electron cloud, and n is negative integer, and θ is the radiation side of Smith-Purcell radiation
To the angle with Particles Moving direction in electron cloud.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments makes professional and technical personnel in the field can be realized or use the application.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the application.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (8)
1. a kind of electromagenetic wave radiation system characterized by comprising rectangular raster and electronics note transmitting equipment, wherein；
The first surface of the rectangular raster has periodic structure；
The electronics note transmitting equipment is used to emit every preset time to the rectangular raster parallel with the first surface
Electron cloud, to have motivated the surface wave on the rectangular raster, the electron cloud will be modulated by the surface wave, so that each electricity
Son group is internal to generate several small electron clouds, and finally formed electron cloud will generate relevant Smith- in grating upper half-space
Purcell radiation；
The tranmitting frequency of the electron cloud of the electronics note transmitting equipment transmitting is the inverse of the preset time.
2. system according to claim 1, which is characterized in that the electronics note transmitting equipment is photoinjectors.
3. system according to claim 2, which is characterized in that the photoinjectors include: photocathode and laser hair
Jet device；Wherein,
The laser transmitting set emits laser pulse to the photocathode for each preset time, so that the photocathode exists
The electron cloud is generated under the excitation of the laser pulse and is emitted from the surface of emission of the photocathode.
4. system according to claim 3, which is characterized in that the cross section of the surface of emission of the photocathode is perpendicular to first
Plane, and the shape of the cross section is rectangle.
5. system according to claim 4, which is characterized in that the rectangle by be parallel to the long side of first direction with it is parallel
It is constituted in the short side of second direction；
The first direction is perpendicular to the second direction, and the first direction is parallel with first plane.
6. system according to claim 5, which is characterized in that the ratio of the long side length and bond length is greater than or waits
In 10.
7. a kind of electromagenetic wave radiation method characterized by comprising
Electromagenetic wave radiation system is provided, the electromagenetic wave radiation system is electromagenetic wave radiation described in any one of claims 1-6
System；
Emit equipment to the rectangular raster periodical launch and the rectangle using the electronics note of the electromagenetic wave radiation system
The parallel electron cloud of the first surface of grating, to have motivated the surface wave on the rectangular raster, the electron cloud will be described
Surface wave modulation, so that generating several small electron clouds inside each electron cloud, finally formed electron cloud will be on grating in midair
Between generate relevant Smith-Purcell radiation；
The tranmitting frequency of the electron cloud of the electronics note transmitting equipment transmitting is the inverse of the preset time.
8. being generated relevant the method according to the description of claim 7 is characterized in that the electron cloud motivates the rectangular raster
Smith-Purcell radiation process include:
The electron cloud motivates the periodic structure of the first surface of the rectangular raster to generate surface wave；
The electron cloud and the surface wave interaction generate electron bunching, to generate in the inside of each electron cloud
Multiple small electron clouds, clustering frequency are the positive integer times of the tranmitting frequency of the electron cloud of electronics note transmitting equipment transmitting；
The beam of beam the group factor and the electron cloud of the small electron cloud is rolled into a ball after the factor is superimposed, and a series of mixed components are generated,
The frequency of the mixed components meets the first preset formula；
Electron cloud comprising the mixed components forms the relevant Smith- of multiple and different frequencies on the rectangular raster surface
Purcell radiation；
First preset formula are as follows: f=pf1+qf0；Wherein, f is the frequency of mixed components, f1For the clustering frequency, f0For
The tranmitting frequency of the electron cloud, p, q are nonzero integer.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130091203A (en) * | 2012-02-07 | 2013-08-16 | 삼성전자주식회사 | Smith-purcell terahertz oscillator |
| CN104466617A (en) * | 2013-09-18 | 2015-03-25 | 中国科学院苏州纳米技术与纳米仿生研究所 | Terahertz light source chip and manufacturing method thereof, terahertz light source device and manufacturing method thereof, and terahertz light source module and manufacturing method thereof |
| CN105207042A (en) * | 2015-09-25 | 2015-12-30 | 中国科学院电子学研究所 | THz wave radiation source with oval groove grating structure |
| CN105655851A (en) * | 2015-12-29 | 2016-06-08 | 中国科学技术大学 | Non-relativistic electron beam induced dielectric waveguide-based terahertz radiation source |
| CN105742943A (en) * | 2016-01-22 | 2016-07-06 | 中国科学技术大学 | Free electron laser based tunable narrow-band compact terahertz radiation source |
| CN106601573A (en) * | 2017-01-25 | 2017-04-26 | 中国科学技术大学 | Electromagnetic radiation source |
| CN107093538A (en) * | 2017-05-17 | 2017-08-25 | 中国科学技术大学 | Smith's Pa Saier electromagnetic radiation sources based on two sections of rectangular rasters |
| CN107863672A (en) * | 2017-11-27 | 2018-03-30 | 中国科学技术大学 | A kind of electromagenetic wave radiation method and radiating system |
-
2018
- 2018-05-21 CN CN201810489034.XA patent/CN108550509B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130091203A (en) * | 2012-02-07 | 2013-08-16 | 삼성전자주식회사 | Smith-purcell terahertz oscillator |
| CN104466617A (en) * | 2013-09-18 | 2015-03-25 | 中国科学院苏州纳米技术与纳米仿生研究所 | Terahertz light source chip and manufacturing method thereof, terahertz light source device and manufacturing method thereof, and terahertz light source module and manufacturing method thereof |
| CN105207042A (en) * | 2015-09-25 | 2015-12-30 | 中国科学院电子学研究所 | THz wave radiation source with oval groove grating structure |
| CN105655851A (en) * | 2015-12-29 | 2016-06-08 | 中国科学技术大学 | Non-relativistic electron beam induced dielectric waveguide-based terahertz radiation source |
| CN105742943A (en) * | 2016-01-22 | 2016-07-06 | 中国科学技术大学 | Free electron laser based tunable narrow-band compact terahertz radiation source |
| CN106601573A (en) * | 2017-01-25 | 2017-04-26 | 中国科学技术大学 | Electromagnetic radiation source |
| CN107093538A (en) * | 2017-05-17 | 2017-08-25 | 中国科学技术大学 | Smith's Pa Saier electromagnetic radiation sources based on two sections of rectangular rasters |
| CN107863672A (en) * | 2017-11-27 | 2018-03-30 | 中国科学技术大学 | A kind of electromagenetic wave radiation method and radiating system |
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