Active Dual-Wavelength Optical Switch-Based Plasmonic Demultiplexer Using Metal-Kerr Nonlinear Material-Metal Waveguide

To realize active light control with a compact structure, a nanoscale optical switch-based plasmonic demultiplexer is proposed. The device is designed according to the metal-Kerr nonlinear material-metal waveguide with multiple resonant cavities, providing the capability of active optical regulation for dual wavelengths: Signals of 1310 and 1550 nm can be guided into either output with high directional extinction ratios larger than 30 dB controlled by another pump light of 730 nm with low power. Considering its light control capability and compact configuration, it is believed that the proposed demultiplexer can be adopted in the future logic plasmonic circuits.