title: Compact and broadband mode multiplexer and demultiplexer based on asymmetric plasmonic-dielectric coupling.
abstract: A compact and broadband mode (de)multiplexer utilizing the asymmetrical directional coupling between a hybrid plasmonic waveguide and a silicon nanowire waveguide is proposed. The coupling length is 13.6 μm, which is the shortest in TE0 and TE1 mode multiplexers reported, to the best of our knowledge. It shows a high mode conversion efficiency of 99.2% with excess loss of only 0.35 dB at 1550 nm. The mode multiplexing circuit exhibits a low crosstalk of less than -17  dB over a large bandwidth of 100 nm.
authors.forename: Mei
authors.initials: M
authors.lastname: Yin
authors.forename: Qingzhong
authors.initials: Q
authors.lastname: Deng
authors.forename: Yanping
authors.initials: Y
authors.lastname: Li
authors.forename: Xingjun
authors.initials: X
authors.lastname: Wang
authors.forename: Hongbin
authors.initials: H
authors.lastname: Li