Title :
Efficient Unidirectional Optical Coupling for Hybrid Plasmonic Waveguide
Author :
Chih-Chun Ho ; Fan Lu ; Kun Li ; Dalin Liu ; Anshi Xu
Author_Institution :
State Key Lab. of Adv. Opt. Commun. Syst., Peking Univ., Beijing, China
Abstract :
A new type of efficient and unidirectional optical coupler composed of periodic nanoslits milled in the metallic surface is proposed for the hybrid plasmonic waveguides. The operation principle is clarified and theoretically illustrated by using the coupled-mode model and the fully vectorial aperiodic Fourier modal method. The coupling efficiency of more than 50% and splitting ratios better than 18 dB at the incident angle θ= 12° could be achieved over the C-band ranging from 1530 to 1570 nm.
Keywords :
Fourier transform optics; coupled mode analysis; nanophotonics; nanostructured materials; optical couplers; optical waveguide theory; plasmonics; C-band; coupled-mode model; coupling efficiency; fully vectorial aperiodic Fourier modal method; hybrid plasmonic waveguide; incident angle; metallic surface; periodic nanoslits; splitting ratio; unidirectional optical coupler; unidirectional optical coupling; wavelength 1530 nm to 1570 nm; Couplers; Couplings; Metals; Optical surface waves; Optical waveguides; Optimized production technology; Plasmons; Engineered photonic nanostructures; gratings; hybrid plasmonic waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2332151
