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Spinning terahertz emitter with controllable polarization direction

A polarization direction, terahertz technology, applied in solid-state lasers and other directions, can solve the problems of high cost, low efficiency, bulky, etc., and achieve the effect of low cost, simple structure and small volume

Active Publication Date: 2020-12-18
HEFEI INNOVATION RES INST BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The spin terahertz sources in the prior art require permanent magnets, choppers, off-axis parabolic mirrors and other devices to modulate and collimate the generated terahertz, which is inefficient, bulky, complex and expensive

Method used

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  • Spinning terahertz emitter with controllable polarization direction
  • Spinning terahertz emitter with controllable polarization direction

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Embodiment Construction

[0020] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Such as figure 1 and 2 As shown, a spin terahertz emitter with controllable polarization direction includes a metal casing 108, a spin terahertz source arranged inside the metal casing, and a first The electromagnetic coil 110-1 and the third electromagnetic coil 110-3, the second electromagnetic coil 110-2 and the fourth electromagnetic coil 110-4 which are vertically arranged and oppositely arranged on both sides of the spin terahertz source, and used for focusing The optical focusing lens 109 of the second laser; the spin terahertz source includes a glass substrate 103, a ferromagnetic layer 102, and a nonmagnetic layer 101 stacked horizontally in sequence; the optical focusing lens is embedded in the bottom surface of the metal casing, and its The focal length is equal to the distance between the junction of the ferromagnetic laye...

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PUM

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Abstract

The invention discloses a spinning terahertz emitter with a controllable polarization direction, which comprises a metal shell, a spinning terahertz source arranged in the metal shell, a first electromagnetic coil and a third electromagnetic coil vertically arranged and oppositely arranged at the two ends of the spinning terahertz source, a second electromagnetic coil and a fourth electromagneticcoil vertically arranged and oppositely arranged on the two sides of the spinning terahertz source, and an optical focusing lens for focusing the femtosecond laser. The spinning terahertz source comprises a glass substrate, a ferromagnetic layer and a non-magnetic layer which are horizontally stacked in sequence. The optical focusing lens is embedded in the bottom face of the metal shell, and thefocal length of the optical focusing lens is equal to the distance between the junction of the ferromagnetic layer and the glass substrate and the optical focusing lens.

Description

technical field [0001] The invention relates to the field of terahertz emitting equipment, in particular to a spin terahertz emitter with controllable polarization direction. Background technique [0002] The terahertz frequency band is located between infrared and microwave. It is a transitional frequency band between macroelectronics and microphotonics. It has many advantages such as broadband, low energy, high transparency, and uniqueness. Diagnosis, satellite communication and other fields have great scientific value and broad application prospects. Due to its unique terahertz generation mechanism, the spin terahertz source has the advantages of low cost and high efficiency, and is an important development direction of terahertz technology in the future. [0003] The spin terahertz source in the prior art requires devices such as permanent magnets, choppers, and off-axis parabolic mirrors to modulate and collimate the generated terahertz, which is inefficient, bulky, co...

Claims

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Application Information

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IPC IPC(8): H01S1/02
CPCH01S1/02
Inventor 张晓强许涌张帆杜寅昌张悦赵巍胜
Owner HEFEI INNOVATION RES INST BEIHANG UNIV