An optical AND logic device based on chiral surface plasmon polaritons (SPPs) is theoretically proposed. The AND logic device is made up of five Y-shape nanowires with two input ports and one output port. Chiral SPPs excited at the end of input ports propagate along the nanowire. By adding two gold blocks on one side of the AND logic device, the chirality of the device is amplified. By modifying parameters, we find suitable parameters to design the structure with a large chirality at the working wavelength. By setting the threshold, we achieve the AND logic devices. Our structure may provide a significant component in signal transmission and processing devices.
Chiral Surface Plasmon Polaritons on Metallic Nanowires
