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Terahertz emitter based on spin filtering and production method thereof

A transmitter, terahertz technology, applied in solid-state lasers and other directions, can solve the problems of difficult tuning, high production cost, bulky and other problems, and achieve the effect of small device size, high cost and high integration

Active Publication Date: 2021-03-26
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

As far as practical application is concerned, the frequency of the terahertz wave radiated by the terahertz gas laser is not continuously adjustable, and it is bulky, making it difficult to miniaturize; the frequency of the terahertz electromagnetic wave radiated by the photoconductive antenna is low, and the external auxiliary equipment is complex; The nonlinear electro-optic crystal zinc telluride used in the optical rectification effect has high production cost and complicated process, and has intrinsic absorption for the generated terahertz; the nonlinear difference frequency conversion efficiency is low, the structure is complex, and it is difficult to tune

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  • Terahertz emitter based on spin filtering and production method thereof
  • Terahertz emitter based on spin filtering and production method thereof
  • Terahertz emitter based on spin filtering and production method thereof

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] refer to Figure 1-4 , a terahertz transmitter based on spin filtering, comprising: a substrate, a ferromagnetic layer disposed on the substrate, a spin filter layer disposed on the ferromagnetic layer, disposed on the The non-magnetic layer on the spin filter layer and the covering layer arranged on the non-magnetic layer, the ferromagnetic layer, the spin filter layer and the non-magnetic layer form a heterojunction.

[0035] Further, the ferromagnet...

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Abstract

The invention discloses a terahertz emitter based on spin filtering and a production method thereof. The terahertz emitter comprises a substrate, a ferromagnetic layer disposed on the substrate, a spin filtering layer disposed on the ferromagnetic layer, a non-magnetic layer disposed on the spin filtering layer, and a covering layer disposed on the non-magnetic layer. And the ferromagnetic layer,the spin filtering layer and the non-magnetic layer form a heterojunction. According to the invention, the production process of the terahertz emitter is relatively simple, the cost is low, an etchingstep is not included, only a uniform thin layer needs to be deposited on various substrates, and miniaturization and integration of a terahertz radiation source can be realized.

Description

technical field [0001] The invention relates to the technical field of photoelectric functional devices, in particular to a spin filter-based terahertz emitter and a preparation method thereof. Background technique [0002] Ultrafast laser technology is one of the most powerful new tools in recent decades, providing a stable and reliable excitation source for the generation of terahertz pulses. Imaging technology and time-domain spectroscopy technology based on terahertz radiation are widely used in many fields such as medicine, military affairs, and modern communication technology. With the development of terahertz science and technology, the development of small terahertz radiation sources with low cost, high efficiency and compact structure has become the key to the development of terahertz technology. There are mainly three design schemes for terahertz radiation sources. The first is photonics technology, represented by terahertz lasers (gas lasers, quantum cascade las...

Claims

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Application Information

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IPC IPC(8): H01S1/02
CPCH01S1/02
Inventor 金钻明朱亦鸣彭滟庄松林
Owner UNIV OF SHANGHAI FOR SCI & TECH
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