Provided is an ultra
wide band absorber based on
cascade structure metamaterials. The invention relates to the ultra
wide band absorber, and aims at solving the problems that for an existing ultra
wide band absorber, the
absorption rate is low, the incident angle is small, the absorption
wavelength range is narrow, and the ultra wide band absorber can not absorb across multiple wavebands. The ultra wide band absorber based on the
cascade structure metamaterials adopts two ways, namely, interaction between device physical sizes and electromagnetic
waves and interaction between
dielectric materials and the electromagnetic
waves, to act in a combined mode, so that coupled superposition is conducted on units with different sizes, the coupled superposition is conducted among different
dielectric constants in the same unit, ultra wide
bank absorption of the metamaterials on the electromagnetic
waves is achieved, the
absorption rate is over 92%, the absorption
wavelength ranges from 284 nm to 1524 nm, partial
ultraviolet waves, all visible light and partial near
infrared waves are included, and under the incident condition of 40-degree
angle of inclination, the
absorption rate can still reach over 90%. The ultra wide band absorber based on the
cascade structure metamaterials can be applied to the fields of
solar cell absorption, thermal emitters and photoelectric equipment.