Diffuse reflections by randomly gradient index metamaterials.
We have demonstrated that a thin planar coating with randomly distributed index gradients can create diffuse reflections in front of a planar conducting sheet. This scheme is verified by two-dimensional near-field scanning measurement, in which the randomly gradient index coating is implemented by periodic crossed-I-shaped array whose unit cell's dimension varies spatially. Some qualitative principles of choosing the distribution mode of random index gradient are presented.
Yang
Xin Mi
XM
State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China.
Zhou
Xiao Yang
XY
Cheng
Qiang
Q
Ma
Hui Feng
HF
Cui
Tie Jun
TJ