Terahertz waves are electromagnetic waves with a frequency in the range of 0.1-10 THz (wavelength 3000-30μm). It is the transition zone from macroscopic classical theory to microscopic quantum theory, and it is also the transition zone from electronics to photonics. This band has many magical characteristics, such as penetrability, harmless to the human body, and large bandwidth. The realization of high resolution or even super resolution in the low frequency terahertz band has always been the bottleneck of terahertz imaging. We propose to use low-loss waveguides instead of traditional terahertz lenses or off-axis parabolic mirrors to achieve terahertz super-resolution imaging, and make full use of the flexibility and low loss characteristics of waveguides to construct transmission, reflection, and flexible terahertz 2D and 3D imaging system. It can be used in industry, archaeology, security, energy, biomedicine and other fields.

Metamaterials/metamaterials refer to composite materials with artificially designed structures that exhibit extraordinary electromagnetic properties not found in natural materials. We combine it with MEMS micro-cantilever beam technology to construct an ultra-sensitive radiation detector that can detect far-infrared and terahertz radiation. Meanwhile, in order to realize the application of metamaterials in stealth, energy and other fields, we have studied devices and systems with special physical properties such as programmable intelligent stealth metamaterials, which will be used in the fields of defense, communications and energy in the future.