▎ 摘　　要

NOVELTY - Graphene adjustable broadband terahertz polarization converter, comprises multiple adjustable polarization conversion units arranged in a rectangular array in the same plane. The adjustable polarization conversion unit includes a metal grating layer (5) that is stacked sequentially from top to bottom along the z-axis direction and parallel to the x-axis, dielectric substrate layer (6), upper graphene grating layer (7), silicon dioxide film isolation layer (9), lower graphene grating layer (8), and DC voltage source (10). In a graphene grating layer, a small-scale trapezoidal graphene sheet and a large-scale trapezoidal graphene sheet form a group, a total of two groups, which are symmetrically distributed with the angle bisector of the x-axis and the y-axis as the symmetrical axis, and the large-scale trapezoidal graphene sheet is close to the angle bisector. USE - Graphene adjustable broadband terahertz polarization converter. Uses include but are not limited to military, remote sensing, data communication and transmission of high security, atmosphere and environment monitoring, real-time biological information extraction and medical diagnosis field. ADVANTAGE - The converter realizes dynamic regulation of terahertz wave polarization with tunable working frequency band width, high polarization conversion rate, simple structure and characteristics. The converter can control the polarization of the tera hertz wave, so that the polarization angle of the wave is converted in the broadband. The graphene grating has a tunable polarization conversion function, and is the core functional material of the converter. The adjustable direct current voltage source has the function of adjusting graphene Fermi level. DESCRIPTION OF DRAWING(S) - The drawing shows a three-dimensional diagram of a polarization conversion unit. 5Metal grating layer 6Dielectric substrate layer 7Upper graphene grating layer 8Lower layer graphene grating layer 9Silicon dioxide film isolating layer 10DC voltage source