Unidirectional Photonic Circuit with Phase-Change Fano Resonator
Optics
2018-11-14 v1 Applied Physics
Abstract
We demonstrate that the integration of a phase-change material (PCM) in one of the two microresonators of a photonic metamolecule, coupled to a bus waveguide, can lead to unidirectional Fano resonances and to the emergence of a unidirectional transmission window. The phase change is caused by light-induced heating and is accompanied by an abrupt increase in the extinction coefficient of the PCM resonator. Due to the photonic circuit asymmetry, the critical value of the input light intensity triggering the phase change is strongly dependent on the input light direction. The latter determines the unidirectional nature of the emerging transmission window. This effect can be utilized in on-chip magnetic-free isolators and Q-switches.
Keywords
Cite
@article{arxiv.1809.05276,
title = {Unidirectional Photonic Circuit with Phase-Change Fano Resonator},
author = {Roney Thomas and Eleana Makri and Tsampikos Kottos and Boris Shapiro and Ilya Vitebskiy},
journal= {arXiv preprint arXiv:1809.05276},
year = {2018}
}