Tunable negative-index photonic crystals using colloidal magnetic fluids*
Geng Tao†, Wang Xin, Wang Yan, Dong Xiang-Mei
       
EFS contours of the 2D PC under external magnetic field 250 Oe for (a) TM polarization and (b) TE polarization at several relevant frequencies in the second band. The gray line shows the first Brillouin zone.