Terahertz near-field detector with high sensitivity

Abstract

The invention belongs to the technical field of terahertz wave detection, and especially relates to a terahertz near-field detector with high sensitivity. In view of the inconvenient adjustment of the current terahertz near-field detector, the following scheme is proposed: the terahertz near-field detector comprises a fixed shell; a first sliding groove is arranged on the inner wall of the bottom of the fixed shell, and the inner wall of one side of the first sliding groove is rotatably connected with a screw rod; the other end of the screw rod extends to the outside of the fixed shell; the outer wall of the circumference of the screw rod is connected with a lower sliding block in a sliding mode, and the outer wall of one side of the circumference of the screw rod is rotatably connected with a driven gear; and the outer wall of one side of the fixed shell is connected with a rotating shaft. According to the terahertz near-field detector with the high sensitivity provided by the invention, a hand wheel, a driving gear and the driven gear are arranged, so that a lower sliding block on the screw rod can be driven to move, so that the distance between a photoconductive antenna on a metal plate with a hole at the top of the lower sliding block and a silicon lens can be changed, therefore different positions of terahertz waves are imaged, thereby improving the working efficiency and facilitating the adjustment by people.

Description

technical field [0001] The invention relates to the technical field of terahertz wave detection, in particular to a terahertz near-field detector with high sensitivity. Background technique [0002] Terahertz (THz) radiation is electromagnetic radiation from 0.1THz to 10THz, which is between infrared and microwave radiation, and is the transition area between photonics technology and electronic technology, macroscopic and microscopic. The THz band is a very scientifically valuable but undeveloped electromagnetic radiation area. Its research involves physics, optoelectronics and material science, etc. It has broad fields in imaging, medical diagnosis, environmental science, information, national security and basic physics research. application prospect and application value. In the development and utilization of terahertz band, the detection of terahertz signal is a very important work. [0003] In order to be able to detect and image different positions of the terahertz, i...

AI Technical Summary

Problems solved by technology

[0003] In order to be able to detect and image different positions of the terahertz, it is necessary to change the distance between the photoconductive antenna and the silicon lens, but the current terahertz near-field detector is inconvenient to adjust the above distance, which reduces the work efficiency of the staff. easy for people to use

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