Ultra-wideband absorption switchable polarization independent wave absorber

The invention provides an ultra wide band absorption switchable polarization independent wave absorber. The wave absorber is composed of three layers of structures which are respectively a metal layer, a silicon dioxide dielectric layer and an alum dioxide film structure layer from bottom to top. Structural parameters of the vanadium dioxide thin film with the optimal size are selected through optimized scanning, and dynamic regulation and control of # imgabs 1 # in a broadband can be achieved by adjusting the conductivity # imgabs 0 # of vanadium dioxide. In addition, the invention also has the advantages of simple structure, easy preparation and the like. Therefore, the invention has great application potential in broadband tunable polarization-independent wave-absorbing devices. 本发明提出一种超宽带吸收可切换偏振无关吸波器。该吸波器由三层结构构成，自下而上分别是金属层、二氧化硅电介质层及二氧化矾薄膜结构层。通过优化扫描选出具有最优尺寸的二氧化矾薄膜结构参数，通过调节二氧化矾的电导率#imgabs0#可以实现在宽带内#imgabs1#的动态调控。除此之外，该发明还具有结构简单、易于制备等优点。因此，该发明在宽带可调谐偏振无关吸波器件中具有较大的应用潜力。