Beam Manipulation by Metallic Nanoslit Arrays with Perpendicular Cuts inside Slits
HAO Zhi-Qiang1,2, LI Yu-Dong1, CHEN Jing1, CHEN Zong-Qiang1, XU Jing-Jun1, SUN Qian1**
1MOE Key Laboratory of Weak Light Nonlinear Photonics, Tianjin Key Laboratory of Photonics and Technology of Information Science, School of Physics, Nankai University, Tianjin 300071 2Department of Physics, School of Science, Tianjin University of Commerce, Tianjin 300134
Abstract：Beam manipulation by metallic nanoslit arrays with perpendicular cuts inside the slits was investigated numerically. The simulated results performed by the finite element method (FEM) show that perpendicular cuts with different heights can modulate phase retardation of the transmitted light through the slits. With the proper distribution of cut height, a focused beam is achieved in our metallic nanostructure with four-time amplitude at the focus point and half focal length compared to a slit array without cuts inside. By using asymmetric distribution of height amplitude, a beam deflection around 6° can also be realized in our design.
2012, Vol. 29 
