Method for regulating and controlling circular polarization related photocurrent of tellurium antimonide film

A photocurrent and circular polarization technology, which is applied in circuits, electrical components, sustainable manufacturing/processing, etc., can solve the problem of effective control of circular polarization-related photocurrent without three-dimensional topological insulator tellurium antimonide, and achieve low cost and control The effect of large range and obvious control effect

Active Publication Date: 2020-01-21
FUZHOU UNIV
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Problems solved by technology

[0003] However, there is no effective method to control the circular polarization-dependent photocurrent of the three-dimensional topological insulator tellurium antimonide

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  • Method for regulating and controlling circular polarization related photocurrent of tellurium antimonide film
  • Method for regulating and controlling circular polarization related photocurrent of tellurium antimonide film
  • Method for regulating and controlling circular polarization related photocurrent of tellurium antimonide film

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Embodiment Construction

[0025] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0026] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0027] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components...

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Abstract

The invention relates to a method for regulating and controlling circular polarization related photocurrent of a tellurium antimonide film. The method comprises the steps: pasting the tellurium antimonide film to a copper block, and changing the temperature of the tellurium antimonide thin film by changing the temperature of the copper block, wherein due to the fact that laser can heat a laser irradiation area and the light intensity of the upper surface is greater than that of the portion, reaching the substrate, of the upper surface, a temperature gradient exists between the upper surface and the substrate, and due to the thermoelectric effect, the temperature gradient can generate thermoelectric potential energy perpendicular to the surface of the sample; generating a spin current perpendicular to the surface of the sample under the action of the thermoelectric potential energy, wherein due to the inverse spin Hall effect, the transverse charge flow related to circular polarizationis generated, and when the temperature is changed, the thermoelectric potential energy between the upper surface and the substrate is changed, so that the charge flow caused by the inverse spin Hall effect is changed, and the regulation and control of the photocurrent related to circular polarization are realized. The method is remarkable in regulation and control effect, simple, easy to implement, low in cost and beneficial to future application and popularization.

Description

technical field [0001] The invention relates to the field of polarized photocurrent regulation, in particular to a method for regulating the photocurrent related to the circular polarization of a tellurium antimonide thin film. Background technique [0002] The surface states of three-dimensional topological insulators have strong spin-orbit coupling, so they have promising applications in spintronic devices and quantum computing. The three-dimensional topological insulator tellurium antimonide has the characteristics of simple energy band structure and strong pyroelectric effect, so it has attracted extensive attention. When the three-dimensional topological insulating tellurium antimonide is irradiated with circularly polarized light, due to the spin-orbit coupling effect, the direction of the photocurrent generated by the left-handed light and right-handed light will be directional. This current related to the degree of polarization of circularly polarized light is calle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L31/032
CPCH01L31/032H01L31/18Y02P70/50
Inventor 俞金玲庄航赵宜升程树英
Owner FUZHOU UNIV
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