High-speed THz switching device and method thereof

Abstract

The invention discloses a high-speed THz switching device and a method thereof. A metallic film is arranged on a polymer, both the polymer and the metallic film are cuboids, a semi-cylindrical glass prism is arranged on the metallic film, the section of a semi-cylindrical high-resistance silicon prism is rectangular, the rectangle at the lower bottom surface of the semi-cylindrical high-resistance silicon prism is parallel with and has the same size as the cuboid of the metallic film, laser emitted by a laser transmitter enters the polymer through an additional laser input terminal, THz is input from a THz input terminal on one side surface of the semi-cylindrical high-resistance silicon prism, enters the semi-cylindrical high-resistance silicon prism, and is output from a THz output terminal on the other side surface of the semi-cylindrical high-resistance silicon prism after being reflected, and the output THz is detected through a THz detector at the end part of the THz output terminal. The high-speed THz switching device has the advantages of compact structure, high response speed, small loss and low manufacturing cost, and satisfies application requirements in the field of THz imaging, THz communication, THz space astronomy and the like.

Description

technical field [0001] The invention relates to the technical field of terahertz wave applications, in particular to a terahertz wave switch device and a method thereof. Background technique [0002] Terahertz (THz, 1THz = 10 12 Hz) wave refers to the electromagnetic spectrum region whose frequency ranges from 0.1THz to 10THz between millimeter wave and infrared light. Terahertz time-domain spectroscopy is a new type of spectral measurement technology developed since the 1980s. It uses terahertz radiation as the detection source, uses electro-optical sampling or photoconductive sampling to directly record the amplitude time waveform of the terahertz radiation electric field, obtains the spectral distribution of the measured signal amplitude and phase through Fourier transform, and then obtains the absorption and Dispersion and other information. In recent years, terahertz radiation has become an effective means of security inspection due to its unique properties. Teraher...

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Problems solved by technology

[0003] Since the problem of terahertz wave source has not been well solved for a long time, the development of terahertz wave science and technology has been limited, so that its application potential has not been brought into play

At present, a variety of terahertz wave sources and detection devices have been successfully developed in the world, making terahertz wave technology gradually applied in imaging, medical diagnosis, wireless communication, space astronomy and other fields. However, these systems need to switch and control terahertz waves. However, the existing terahertz wave switches have shortcomings such as slow response speed, complex structure, difficult fabrication, and high price. Therefore, it is very necessary to research and develop a terahertz wave high-speed switch with simple structure, fast response speed, and low fabrication cost.

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