Ultra-broadband and polarization-independent planar absorber based on multilayered graphene
Wang Jiao1, Gao Chao-Ning1, Jiang Yan-Nan1, 2, †, Nwakanma Akwuruoha Charles3
       

(color online) (a) A schematic diagram of the transmission and reflection for the structure with N = 3. (b) The amplitude and phase difference of direct reflection and multiple reflections for different N.