Broadband wavelength demultiplxer realized on a nanoscale photonic chip

The realization of photonic chips is a long–sought research goal. Surface plasmon polariton devices and circuits, which bridge the gap between integrated photonics and microelectronic technologies, are promising candidates for on-chip ultracompact planar structures. Integrated wavelength demultiplexers, which can separate different incident light wavelengths to propagate in different channels, are an essential component of photonic chips, and have great potential applications for a variety