Introduction
摘要
Terahertz waves are defined aselectromagnetic waves in the frequency range of 0.1 THz to 10 THz, corresponding to a wavelength range of 3 mm to 30 μm. Terahertz waves occupy the region microwave and infrared regions of the electromagnetic spectrum, overlapping with the extremely high frequency microwave band at lower frequencies and the far-infrared band at higher frequencies.