Asymmetric plasmonic-dielectric coupler with short coupling length, high extinction ratio, and low insertion loss.
Asymmetric directional coupling between a hybrid plasmonic waveguide with subwavelength field confinement and a conventional dielectric waveguide is investigated. The proposed hybrid coupler features short coupling length, high coupling efficiency, high extinction ratio, and low insertion loss; it can also be integrated into a silicon-based platform. This coupler can be potentially adopted for signal routing between plasmonic waveguides and dielectric waveguides in photonic integrated circuits. Furthermore, it can be exploited to efficiently excite hybrid plasmonic modes with conventional dielectric modes.
Li
Qiang
Q
Laboratory of Photonics and Microwave Engineering, School of Information and Communication Technology, Royal Institute of Technology, Electrum 229, Kista 164 40, Sweden.
Song
Yi
Y
Zhou
Gan
G
Su
Yikai
Y
Qiu
Min
M