Low-loss polymer-based long-range surface plasmon-polariton waveguide.

To improve the propagation loss of polymer-based long-range surface-plasmon-polariton (LR-SPP) waveguide devices at the telecom wavelength - range, low-loss LR-SPP waveguides were fabricated in an ultraviolet-curable acrylate polymer with a low refractive index and absorption loss. A propagation loss of 1.72 dB/cm at a wavelength of 1.55 mu m was achieved with a 14-nm-thick and 3-mu m-wide metal stripe.