摘要
Synchronization is of importance in both fundamental and applied physics,but its demonstration at the micro/nanoscale is mainly limited to low-frequency oscillations such as mechanical resonators.We report the synchronization of two coupled optical microresonators,in which the high-frequency resonances in the optical domain are aligned with reduced noise.It is found that two types of synchronization regimes emerge with either the first-or second-order transition,both presenting a process of spontaneous symmetry breaking.In the second-order regime,the synchronization happens with an invariant topological character number and a larger detuning than that of the first-order case.Furthermore,an unconventional hysteresis behavior is revealed for a time-dependent coupling strength,breaking the static limitation and the temporal reciprocity.The synchronization of optical microresonators offers great potential in reconfigurable simulations of manybody physics and scalable photonic devices on a chip.
基金
We thank Linran Fan,Qi-Tao Cao,and Mian Zhang for fruitful discussions.This work was supported by the National Key R&D Program of China(Grant Nos.2016YFA0301302 and 2018YFB2200401)
NSFC(Grant Nos.11825402,61435001,11654003,and 11674200),and High-Performance Computing Platform of Peking University.The authors declare that they have no competing financial interests.
