Fano Resonances from Quadrupole-dipole Split Mode Interference in Photonic Crystal Waveguide-single-cavity Structure

DOI

10.2991/eee-19.2019.17How to use a DOI?

Keywords

Fano resonance, Photonic crystal, Waveguide, Cavity, Mode split

Abstract

In this paper, a waveguide-single-cavity structure in a square-lattice photonic crystal is proposed to generate Fano resonances by the interference of two split modes in the structure with a rectangle defect column in the cavity. Through analyzing the band map of the modes in the bandgap region, Fano resonances with different line shape are found by tuning the parameters of the defect column. The results show that the bright and dark modes for Fano resonances are controllable by the parameters of the defect cavity simultaneously. The Q factor of Fano modes increases with the dark mode going farer from the bright mode and an ultra-high value 106 of Q is obtained. These Fano modes can be applied in many optical devices, such as ultra-narrow filters, switch, and sensors.

Copyright

© 2019, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Yin-bing An
AU  - Tao Fu
AU  - Zheng-biao Ouyang
PY  - 2019/07
DA  - 2019/07
TI  - Fano Resonances from Quadrupole-dipole Split Mode Interference in Photonic Crystal Waveguide-single-cavity Structure
BT  - Proceedings of the 2nd International Conference on Electrical and Electronic Engineering (EEE 2019)
PB  - Atlantis Press
SP  - 95
EP  - 99
SN  - 2352-5401
UR  - https://doi.org/10.2991/eee-19.2019.17
DO  - 10.2991/eee-19.2019.17
ID  - An2019/07
ER  -