A method for generating terahertz circularly polarized light based on narrow-band semiconductor indium antimonide

A circularly polarized light and generation method technology, applied in optics, optical components, nonlinear optics, etc., can solve the problems of high cost and achieve the effect of wide modulation frequency

Inactive Publication Date: 2019-01-22
FUZHOU UNIV
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Problems solved by technology

These methods require the use of femtosecond laser amplifiers, which are expensive

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  • A method for generating terahertz circularly polarized light based on narrow-band semiconductor indium antimonide
  • A method for generating terahertz circularly polarized light based on narrow-band semiconductor indium antimonide
  • A method for generating terahertz circularly polarized light based on narrow-band semiconductor indium antimonide

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Embodiment Construction

[0023] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0024] The invention provides a novel terahertz polarization device based on narrow-band semiconductor indium antimonide, which can effectively convert linearly polarized terahertz waves into circularly polarized terahertz waves. This polarizer has the characteristics of wide modulation frequency, perfectly circularly polarized output, and tunable.

[0025] figure 1 It is a schematic diagram of the use of the terahertz polarizing device of the present invention, including an indium antimonide sample, an incident linearly polarized terahertz wave, a linear polarizer, and an outgoing circularly polarized terahertz wave. The incident terahertz wave increases the degree of polarization through the linear polarizer, and then enters the indium antimonide sample; the indium antimonide sample is loaded with a stable magnetic field perpendicular ...

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Abstract

The invention relates to a terahertz circularly polarized light generating method based on narrow-band semiconductor indium antimonide. An indium antimonide sample wafer is placed in a cryostat, incident ray polarization terahertz waves pass through a linear polarizing film to make the degree of polarization increased after temperature becomes stable, incident rays irradiate on the surface of the indium antimonide sample wafer after focusing, and an adjustable and stable magnetic field is perpendicularly loaded on the indium antimonide sample wafer. Terahertz circularly polarized light is obtained according to the frequency of incident terahertz by adjusting the incidence loading direction and intensity of the magnetic field. The method has the advantages that modulation frequency is wide, circular polarization output is prefect and a polarizing device is tunable.

Description

technical field [0001] The invention relates to optics and terahertz science and technology, in particular to a method for generating terahertz circularly polarized light based on narrow-band semiconductor indium antimonide. Background technique [0002] Terahertz wave is frequency 0.1-10THz (1THz=10 12 Hz) range of electromagnetic waves, which correspond to a wavelength range of 3mm–30μm, and the band is between traditional microwave and infrared. Terahertz technology has a wide range of applications in the fields of non-destructive testing, security imaging, communication and sensing. These applications require not only efficient terahertz emission sources and detectors, but also efficient optical devices to manipulate terahertz waves, such as amplitude modulators, polarizers, wave plates, high-speed switches, etc. The lack of efficient and practical devices to manipulate terahertz waves in the terahertz band has limited the development of terahertz technology. Among al...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/09G02F1/01G02B27/28
CPCG02B27/286G02F1/0136G02F1/09
Inventor 王向峰任志英张生孔陈盈
Owner FUZHOU UNIV
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