AUTHOR=Jiang Bo , Yan Dong , Wang Jing , Qu Dezhan , Wu Jin-Hui 

TITLE=Controlled Bistable Transmission Non-Reciprocity in a Four-Mode Optomechanical System

JOURNAL=Frontiers in Physics

VOLUME=Volume 9 - 2021

YEAR=2022

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2021.822694

DOI=10.3389/fphy.2021.822694

ISSN=2296-424X

ABSTRACT=We examine the bistable transmission nonreciprocity in a four-mode
optomechanical system where a mechanical oscillator interacts with
one of three coupled optical cavities so as to generate an
asymmetric optomechanical nonlinearity. Two transmission
coefficients in opposite directions are found to exhibit
nonreciprocal bistable behaviors due to this asymmetric
optomechanical nonlinearity as the impedance-matching condition is
broken for a not too weak input field. Such a bistable transmission
nonreciprocity can be well manipulated to exhibit reversible higher
isolation ratios in tunable wider ranges of the input field power or
one cavity mode detuning by modulating relevant parameters like
optical coupling strengths, optomechanical coupling strengths,
mechanical frequencies, etc. This optomechanical system provides a
flexible platform for realizing transmission nonreciprocity of weal
light signals and may be extended to optical networks with more
coupled cavities.