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Terahertz signal generator capable of being used for integrated chip, terahertz signal generation method and regulation and control method

A signal generator and integrated chip technology, applied in the electromagnetic field, can solve problems such as unfavorable production and application, expensive equipment, complex structure, etc.

Active Publication Date: 2020-04-24
NANJING NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] All the above-mentioned methods have some disadvantages. Some require complex structures and expensive equipment; some require high voltage and high magnetic field, which consume huge energy; production and application of
It is precisely because the various drawbacks of the existing terahertz signal sources have seriously affected the development of terahertz technology, and the development of new practicable technologies has great research significance and value

Method used

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  • Terahertz signal generator capable of being used for integrated chip, terahertz signal generation method and regulation and control method
  • Terahertz signal generator capable of being used for integrated chip, terahertz signal generation method and regulation and control method
  • Terahertz signal generator capable of being used for integrated chip, terahertz signal generation method and regulation and control method

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Embodiment

[0069] First, the effect of the spin-polarized current density u, i.e., the velocity of the magnetic skyrmions, on the signal frequency is studied, as figure 2 (b) shown. The terahertz signal frequency is highly linearly dependent on the value of the spin-polarized current density u, when u varies from 1 × 10 10 m / s increased to 5.5×10 14 m / s, f 0 , f 1 , f 2 The frequency is increased from 9.9 / 0 / 0MHz to 0.69 / 0.138 / 2.06THz.

[0070] Secondly, the dependence of the magnetic skyrmion lattice spacing d on the frequency of the terahertz signal is explored, as image 3 shown. exist image 3 (a) shows that under zero magnetic field and d are 50, 100 and 200 nm, u = 5 × 10 13 Typical spectrogram at m / s. Washboard frequency f 0 Determined by the magnetic skyrmion velocity v and the magnetic skyrmion lattice d as f 0 =v / d. Such as image 3 (a)- image 3 As shown in (d), for the same spin-polarized current density u, there is a multiple relationship between the washboard ...

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Abstract

The invention discloses a terahertz signal generator capable of being used for an integrated chip, a terahertz signal generation method and a regulation and control method. The device comprises a substrate, a magnetic nano strip, a first electrode, a second electrode, a magnetic tunnel junction and a power supply, wherein the magnetic nano strip is arranged on the substrate, the first electrode and the second electrode are electrically connected with the two ends of the magnetic nano strip respectively, the power supply is electrically connected with the first electrode and the second electrode respectively, the magnetic tunnel junction covers the middle area of the magnetic nano strip, and the area covered by the magnetic tunnel junction is a magnetic moment detection area. According to the method, a spin polarization current is generated in the magnetic nano strip through an impressed current, and a spin transfer torque generated through induction drives a magnetic skyrmion to move in the magnetic nano strip in the direction of the spin polarization current. Movement of the magnetic skyrmion can cause change of magnetic moment, and the change of the magnetic moment along with time generates a terahertz signal. The frequency range of the terahertz signal can be accurately regulated and controlled through each matching value.

Description

technical field [0001] The invention relates to electromagnetic technology, in particular to a terahertz signal generation method applicable to integrated chips. Background technique [0002] Terahertz waves, that is, electromagnetic waves with a frequency in the range of 0.1THz-10THz, have a corresponding wavelength of 3mm to 30μm. In the electromagnetic spectrum, it is between millimeter waves and infrared light, and between photons and electrons in terms of energy. The terahertz frequency band is in the transition zone from macroscopic theory to microscopic quantum theory, and the particularity of its location determines its rich scientific connotation and broad application prospects. Including terahertz radar and communication, spectroscopy and imaging, non-destructive testing, safety monitoring and other fields. However, terahertz applications still have a strong demand for terahertz sources with high efficiency, high power, low cost, and room temperature operation. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S1/02
CPCH01S1/02
Inventor 马付胜金香君
Owner NANJING NORMAL UNIVERSITY
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