Abstract
Digital coded metasurface has greatly simplified the method for electromagnetic wave regulation. However, the traditional metasurface usually focuses on the half-space beam modulation, such as transmissive or reflective direction regulation, which hinders the application of the metasurface-based device. We proposed a full-space terahertz regulation metasurface, which can realize the functions of beam splitting, vortex beam convolution, and focusing for both transmissive and reflective modes. Furthermore, the transmission and reflection modes can be easily switched by changing the external temperature of vanadium dioxide. The presented structure shows excellent performance of full-space terahertz regulation. This method provides a new idea for multifunctional terahertz devices and can be exploited in applications where active manipulation of terahertz transmission direction is required.
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