Breaking Reciprocity in a non-Hermitian Photonic Coupler with Saturable Absorption
Abstract
We study the breaking of reciprocity in non-Hermitian coupled photonic waveguides by the simultaneous action of the nonlinear effect of saturable absorption, and the presence of exceptional points. The nonlinear response of such a system is studied in depth, giving physical insight into the operational principles and fundamental limitations, while producing analytical and semi-analytical results for the transmission and nonreciprocal intensity range. We numerically validate the theoretical results and assess important performance metrics for the nonreciprocal operation of such a device. This novel class of passive non-resonant devices can offer on-chip broadband nonreciprocal operation, making them potentially very important for high-speed applications.
Keywords
Cite
@article{arxiv.2102.07483,
title = {Breaking Reciprocity in a non-Hermitian Photonic Coupler with Saturable Absorption},
author = {Dimitrios Chatzidimitriou and Alexandros Pitilakis and Traianos Yioultsis and Emmanouil E. Kriezis},
journal= {arXiv preprint arXiv:2102.07483},
year = {2021}
}
Comments
10 pages, 6 figures, submitted to Physical Review A on 15-Feb-2021