JP3095284B2 - Light emitting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting device using an electron beam.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional light emitting device using an electron beam. 21 is an electron beam passing through a part of the synchrotron device, 22 is a deflecting magnet and a quadrupole magnet for deflecting and converging the electron beam, 23 is a wiggler magnetic field generator for meandering the electron beam, 24 is an electron beam Is a reflecting mirror for resonating the light generated by the meandering motion of.

[0003] In the conventional light emitting device configured as described above, when the electron beam 21 passes through the wiggler magnetic field 23 while meandering, it interacts with the emitted electromagnetic wave, and the electron beam 21 is decelerated. As a result, stimulated emission in which the electromagnetic wave is amplified occurs, and laser oscillation is generated by the reflecting mirror 24. The oscillation wavelength can be controlled by changing the energy of the electron beam or the wiggler magnetic field.

[0004]

However, in the above configuration, it is necessary to make the electron beam 21 high energy with a relativistic velocity, and the device for that purpose becomes very large, such as the entire room. , Expensive, difficult to move, and high power consumption.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a variable-length, low-power-consumption light-emitting device using an electron beam with a very small structure and low energy.

[0006]

And micro field emission cathode portion for emitting an electron beam SUMMARY OF THE INVENTION, and the electromagnetic field generator for accelerating and collimating the emitted electron beam from the cathode part, is the accelerated and collimated A light emitting device having a diffraction grating or a dielectric provided near the path of the electron beam.

[0007]

According to the present invention, a wake light is emitted by passing an electron beam within several micrometers in the vicinity of a diffraction grating or a dielectric surface, and the radius of the electron beam emitted from the cathode part is reduced by several micrometers. obtaining Ji Erenkofu radiation of near-infrared or visible light by the collimator to be equal to or less than.

[0008]

FIG. 1 is a block diagram showing a light emitting device according to a first embodiment of the present invention. 1 is a micro-cathode unit for emitting electrons, 2 is an anode unit, 3 is an electron beam, 4 is an electromagnetic field generating unit for accelerating and collimating the emitted electron beam, 5 is a dielectric resonator unit, and 6 is a reflecting mirror It is.

The operation of the light emitting device of the first embodiment configured as described above will be described below. Electrons emitted from the cathode unit 1 are accelerated and collimated into a uniform electron beam by an electromagnetic field of 4 and become about 100 keV. When the accelerated electron beam 3 passes through the surface of the dielectric resonator, it emits an electromagnetic wave (wake light) by Cherenkov radiation, and the electromagnetic wave reciprocates in the dielectric resonator by the reflecting mirror 6. The electromagnetic wave in the resonator further interacts with the electron beam, the speed of the electron beam is reduced, and the electromagnetic wave is amplified. At this time,
If the radius of the electron beam is less than a few micrometers and the distance between the electron beam and the surface of the dielectric resonator is less than 1 micrometer, variable-length near-infrared or visible light can be obtained by controlling the speed of the electron beam. Can be

As described above, according to the first embodiment, the current caused by the electron beam is 50 μA, the length of the dielectric resonator is 1 mm, and the distance between the electron beam and the surface of the dielectric resonator is 1 μm. In this case, light having a wavelength of 10 micrometers could be obtained.

FIG. 2 shows a configuration diagram of a light emitting device according to a second embodiment of the present invention. 11 is a micro-cathode part for emitting electrons, 12 is an anode part, 13 is an electron beam, 14
Denotes an electromagnetic field generating unit for accelerating and collimating the emitted electron beam, 15 denotes a diffraction grating unit, and 16 denotes a reflecting mirror.

The operation of the light emitting device according to the second embodiment configured as described above will be described below. Cathode unit 11
The electrons emitted at are accelerated and collimated into a uniform electron beam by 14 electromagnetic fields to about 100 keV. Chere when accelerated electron beam 13 passing through the diffraction grating surface
An electromagnetic wave (wake light) is emitted by Nkov radiation,
The electromagnetic wave reciprocates on the diffraction grating surface by the reflecting mirror. The electromagnetic wave in the resonator further interacts with the electron beam, the speed of the electron beam is reduced, and the electromagnetic wave is amplified. At this time,
When the radius of the electron beam is several micrometers or less and the distance between the electron beam and the surface of the diffraction grating is one micrometer or less, variable-length near-infrared light or visible light can be obtained by controlling the speed of the electron beam.

As described above, in the second embodiment, similarly, light having a wavelength of 10 micrometers can be obtained.

[0014]

As described above, according to the present invention,
Variable length light can be obtained using an electron beam from a very small structure accelerator.

[Brief description of the drawings]

FIG. 1 is a sectional view of a light emitting device according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a light emitting device according to a second embodiment of the present invention.

FIG. 3 is a perspective view of a conventional light emitting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cathode part 2 Anode part 3 Electron beam 4 Electromagnetic field generation part 5 Dielectric resonator part 6 Reflection mirror 11 Cathode part 12 Anode part 13 Electron beam 14 Electromagnetic field generation part 15 Dielectric resonator part 16 Reflection mirror

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G21K 1/00 H05H 15/00

Claims (6)

(57) [Claims] A cathode section for emitting an electron beam; an electromagnetic field generating section for accelerating and collimating the electron beam emitted from the cathode section; and a vicinity of a path of the accelerated and collimated electron beam. A light-emitting device having a dielectric. 2. The light-emitting device according to claim 1, further comprising an optical resonator provided with reflecting mirrors at both ends of a dielectric provided near an electron beam passage. 3. The light emitting device according to claim 1, wherein the size of the cathode portion is 10 microns or less. 4. A cathode section for emitting an electron beam, an electromagnetic field generating section for accelerating and collimating the electron beam emitted from the cathode section, and a passage near the path of the accelerated and collimated electron beam. A light-emitting device having a diffraction grating. 5. The light emitting device according to claim 4, further comprising an optical resonator provided with reflecting mirrors at both ends of a dielectric provided near a path of the electron beam. 6. The light emitting device according to claim 4, wherein the size of the cathode portion is 10 microns or less.