Diode-like asymmetric transmission of circularly polarized waves

作者：Liu Dao Ya; Yao Li Fang; Zhai Xiao Min; Li Min Hua; Dong Jian Feng^*

来源：Applied Physics A, 2014, 116(1): 9-13.

DOI：10.1007/s00339-014-8519-8

Optical diode plays an important role in optical computing and information processing. In this paper, a kind of three-layered chiral metamaterial is proposed to achieve diode-like asymmetric transmission for forward and backward propagations of circularly polarized electromagnetic waves only. The metamaterial is composed of a ring-chain structure sandwiched between two identical S-shaped metallic layers with their corresponding substrates. A transparent transmission at normal incidence in one direction and a small intensity of transmission in the opposite direction are numerically demonstrated in this chiral structure. Besides, the results reveal that the bandwidth of the cross-polarization transmission of this designed structure can be tuned by varying the incident angle of circularly polarized waves.

• 出版日期2014-7
• 单位宁波大学