Terahertz surface plasma wave temperature control switch and control method thereof

Abstract

The invention discloses a terahertz surface plasma wave temperature control switch and a control method thereof, which relate to a terahertz surface plasma wave temperature control device and the method for modulating terahertz surface plasma waves by utilizing the characteristic that the frequency of semiconductor plasmas is changed along with temperature. The switch comprises an intrinsic semiconductor wafer (2), two blades (3) and a temperature controller (5), wherein the plasma frequency of the intrinsic semiconductor wafer (2) is in a terahertz wave band at normal temperature; the two blades (3) are arranged in parallel, and are vertical to the intrinsic semiconductor wafer (2); a distance between the knife edge of the blade (3) and the upper surface of the intrinsic semiconductor wafer (2) is less than attenuation distances of terahertz surface plasma waves (4) in air; the blades (3) convert terahertz waves into the terahertz surface plasma waves, and convert the terahertz surface plasma waves into the terahertz waves; and the temperature controller (5) controls the temperature of the intrinsic semiconductor wafer (2), thereby changing the carrier concentration of the intrinsic semiconductor wafer.

Description

technical field [0001] The invention relates to a terahertz surface plasma wave temperature control device and a method for modulating the terahertz surface plasma wave by utilizing the characteristics that the intrinsic semiconductor plasma frequency varies with temperature. Background technique [0002] Terahertz (THz) waves usually refer to frequencies between 0.1 and 10THz (1THz=10 12 Hz) electromagnetic wave, its wavelength is between microwave and near infrared. In the frequency domain, the terahertz wave is in the transition region from the macroscopic to the microscopic, and in the radiation mechanism, the terahertz wave is in the transition region from the classical electromagnetic radiation to the quantum transition. For a long time, due to the lack of effective terahertz wave generation, modulation, and detection methods, the application of electromagnetic waves in this frequency band is very limited, so that this wave band is called the terahertz gap in the elec...

AI Technical Summary

Problems solved by technology

[0008] Technical problem: The purpose of the present invention is to provide a terahertz surface plasma wave temperature control switch to solve the technical problems in the background technology such as high production cost, large energy loss, and narrow tuning frequency bandwidth.

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