Premium
Spin‐Selective and Wavelength‐Selective Demultiplexing Based on Waveguide‐Integrated All‐Dielectric Metasurfaces
Author(s) -
Zhang Yuebian,
Li Zhancheng,
Liu Wenwei,
Li Zhi,
Cheng Hua,
Chen Shuqi,
Tian Jianguo
Publication year - 2019
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201801273
Subject(s) - waveguide , materials science , optoelectronics , wavelength , power dividers and directional couplers , photonics , optics , coupling (piping) , photonic integrated circuit , multiplexing , dielectric , antenna (radio) , physics , telecommunications , computer science , metallurgy
A novel approach for the design of a spin‐selective directional coupler and spin‐selective wavelength demultiplexing device by integrating an all‐dielectric metasurface into a silicon nitride waveguide is proposed and demonstrated. Taking advantage of the intrinsic chirality of the electromagnetic field inside the waveguide, the propagation direction of the excited waveguide mode can be easily controlled by the spin and wavelength of the incident light. The coupling efficiency of the spin‐selective directional coupler toward one side can reach ≈51.6% at 1836 nm. In addition, the working wavelengths, coupling efficiency, peak width, and mode type can be easily tailored by adjusting the geometric parameters of the waveguide and the antenna arrays. This study may provide a further step in the development of photonic integrated circuits, integrated quantum optics, chiral optics, and high‐bit‐rate telecommunication applications.