10 Gbps Optical Signal Transmission via Long-Range Surface Plasmon Polariton Waveguide

We demonstrate 10 Gbps optical signal transmission via long‐range surface plasmon polaritons (LR‐SPPs) in a very thin metal strip‐guided geometry. The LR‐SPP waveguide was fabricated as a 14 nm thick, 2.5 μm wide, and 4 cm long gold strip embedded in a polymer and pigtailed with single‐mode fibers. The total insertion loss of 16 dB was achieved at a wavelength of 1.55 μm as a carrier wave. In a 10 Gbps optical signal transmission experiment, the LR‐SPP waveguide exhibits an excellent eye opening and a 2.2 dB power penalty at 10−12 bit error rate. We confirm, for the first time, that LR‐SPPs can efficiently transfer data signals as well as the carrier light.