Metal-insulator-metal nanorod arrays for subwavelength imaging.
We proposed using metal-insulator-metal (MIM) nanorod arrays for subwavelength imaging to improve the resolution based on the notable ability of field confinement of the MIM nanorods. The field distribution of a single Au-SiO(2)-Au nanorod, coupling between two nanorods and image transfer of shaped dipole sources through nanorod arrays were investigated by using the finite-difference time-domain method and compared with the case of Au nanorods. A resolution limit of approximately lambda/20 of the Au-SiO(2)-Au nanorod array was obtained, which is several times higher than that of the Au nanorod array.
Wu
Xiaofei
X
State Key Laboratory for Mesoscopic physics and Department of Physics, Peking University, Beijing 100871, P. R. China.
Zhang
Jiasen
J
Gong
Qihuang
Q
D004553:Electric Conductivity; D006046:Gold / Q000737:chemistry*; D007089:Image Enhancement / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure*; D012031:Refractometry / Q000379:methods*; D020349:Surface Plasmon Resonance / Q000379:methods*
D006046:Gold