Gain enhanced Fano resonance in a coupled photonic crystal cavity-waveguide structure
Abstract
Systems with coupled cavities and waveguides have been demonstrated as optical switches and optical sensors. To optimize the functionalities of these optical devices, Fano resonance with asymmetric and steep spectral line shape has been used. We theoretically propose a coupled photonic crystal cavity-waveguide structure to achieve Fano resonance by placing partially reflecting elements in waveguide. To enhance Fano resonance, optical gain material is introduced into the cavity. As the gain increases, the transmission line shape becomes steepened and the transmissivity can be six times enhanced, giving a large contrast by a small frequency shift. It is prospected that the gain enhanced Fano resonance is very useful for optical switches and optical sensors.
Keywords
Cite
@article{arxiv.1612.01268,
title = {Gain enhanced Fano resonance in a coupled photonic crystal cavity-waveguide structure},
author = {Yanhui Zhao and Chenjiang Qian and Kangsheng Qiu and Jing Tang and Yue Sun and Kuijuan Jin and Xiulai Xu},
journal= {arXiv preprint arXiv:1612.01268},
year = {2016}
}
Comments
16 pages, 5 figures