Abstract
Dynamically tunable terahertz (THz) devices are of great interest for applications in wireless communication, information encryption, and biomedical imaging. In this paper, we propose a dynamic and stretchable THz metasurface lens fabricated via 3D aerosol jet printing. Based on P-B phase, eight optical meta-atoms covering the phase shift range of 0 - 2π are employed to construct a phase distribution of a lens. Combined with a multi-level quantitative phase compensation, the metasurface lens achieves focus compensation between focal spots during the stretching process. Experimental results show that the metasurface lens can maintain the target focal length under a stretching ratio of up to s = 115%. This work also investigates the feasibility of 3D aerosol jet printing for THz metasurfaces, providing an insight into the development of low-cost THz optical devices.