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Device for generating short high-field terahertz pulse based on multi-foil conical radiation source

A radiation source, terahertz technology, applied in the field of terahertz technology, to achieve the effects of easy operation, remarkable effect, and simple device

Inactive Publication Date: 2018-04-13
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the problem that the peak energy of ultrashort terahertz pulses currently produced only has a certain intensity, and proposes a device for generating high-field terahertz short pulses based on a multi-foil conical radiation source, using electron beams incident on two electrodes Transit radiation is generated on the metal foil between the sheets to radiate terahertz pulses

Method used

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  • Device for generating short high-field terahertz pulse based on multi-foil conical radiation source
  • Device for generating short high-field terahertz pulse based on multi-foil conical radiation source
  • Device for generating short high-field terahertz pulse based on multi-foil conical radiation source

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Embodiment Construction

[0014] Such as figure 1 The schematic diagram of the device for generating high-field terahertz short pulses based on a multi-foil conical radiation source is shown, including an electron beam generator 1, an annular electrode sheet 2, a DC high-voltage power supply 3, a circular conductive foil group 4, and a circular electrode sheet 5 , focusing lens 6, thermal detector 7.

[0015] The short electron beam output from the electron beam generator 1 propagates along a straight line, first passes through the ring electrode sheet 2 and enters the high-voltage electric field, and then irradiates to the section formed by coaxially shelving and stacking a plurality of circular conductive foils with decreasing radii. On the cone 4, this process is based on the principle of Transit-Cherenkov radiation. The electron beam hits the circular electrode sheet 5, and the electron beam radiates a terahertz wave on each metal foil, and the radiated terahertz wave The superposition forms a con...

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Abstract

The invention relates to a device for generating a short high-field terahertz pulse based on a multi-foil conical radiation source. An electronic beam enters metal foil between two electrode sheets togenerate transition radiation, so that a terahertz pulse radiates. An electric field is generated through applying high voltage to the electrode sheets to improve the movement velocity of the electronic beam, thereby achieving the function of improving the intensity of the ultrashort terahertz pulse. The device can be built only by simple optical elements, so that the device is simple, the effectis significant, and the peak power of the generated ultrashort pulse can reach the gigabit level. In an actual operation process, flexible adjustment can be achieved only by controlling the intensityof the applied electric field, so that operation is easy.

Description

technical field [0001] The invention relates to a terahertz technology, in particular to a device for generating high-field terahertz short pulses based on a multi-foil conical radiation source. Background technique [0002] Terahertz waves refer to electromagnetic waves with a frequency of 0.1-10 THz (wavelength in the range of 0.03 to 3 mm). With the development of a series of new technologies and materials in the 1980s, especially the development of ultrafast technology, the acquisition of broadband stable, pulsed terahertz sources has become a quasi-conventional technology, and terahertz technology has developed rapidly and has gained worldwide popularity Set off a terahertz research boom. At present, the main applications of terahertz waves include terahertz time-domain spectroscopy technology, terahertz imaging technology, security inspection, terahertz radar, astronomy, and communication technology. Based on the current terahertz technology, we invented a device tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S1/02
CPCH01S1/02
Inventor 唐心雨彭滟朱亦鸣刘志佳肖海成孙召召刘可盈庄松林
Owner UNIV OF SHANGHAI FOR SCI & TECH
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