Control the dispersive properties of compound plasmonic lenses

We propose novel compound plasmonic lenses, which consist of metal-insulator-metal waveguides (MIMWGs) and phase zone plates (PZPs), with controllable dispersive properties. Numerical simulation results show that this new type of compound plasmonic lens is capable of not only minimizing the chromatic aberration but also rearranging the order of focal positions for incident light at visible frequencies. One chosen wavelength can be designed to have the shortest or the longest focal length. This controllable dispersive light-focusing behavior opens up new applications in the fields of hyper spectral imaging, binary optics and holographic devices.