Haiyan Chen,
Long-Jiang Deng,
Nan Zhang,
Guorui Zhang,
Yang Zhou,
and
Peiheng Zhou,
"Analysis and Design of Multi-band Absorber with Periodic Three-dimensional Square Ring Units,"
Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9,Page(s)1097-1100