Creating negative refractive identity via single-dielectric resonators.
From a periodic array of commercially available zirconia cubes, we demonstrate artificial magnetic and electric dipoles due to the combination of displacement currents and Mie resonance. By scaling the size and periodicity of these dielectric resonators, the corresponding magnetic and electric responses are shifted to the desired frequencies. To further overlap the magnetic and electric resonances in the same frequency, we create a negative refractive index medium (NRIM) from single-dielectric resonators. Comparing with the conventional NRIM comprised of metallic or two-dielectric resonators, these single-dielectric structures present the low-loss and isotropic characteristics, and possess a further advantage to facilitate practical applications.
Lai
Yue-Jun
YJ
Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, ROC.
Chen
Cheng-Kuang
CK
Yen
Ta-Jen
TJ