Nonreciprocity is important in both optical information processing and topological photonics studies.Conventional principles for realizing non reciprocity rely on magnetic fields,spatiotemporal modulation,or nonlinear...Nonreciprocity is important in both optical information processing and topological photonics studies.Conventional principles for realizing non reciprocity rely on magnetic fields,spatiotemporal modulation,or nonlinearity.Here we propose a generic principle for generating nonreciprocity by taking advantage of energy loss,which is usually regarded as harmful.The loss in a resonance mode induces a phase lag,which is independent of the energy transmission direction.When multichannel lossy resonance modes are combined,the resulting interference gives rise to nonreciprocity,with different coupling strengths for the forward and backward directions,and unidirectional energy transmission.This study opens a new avenue for the design of nonreciprocal devices without stringent requirements.展开更多
基金supported by the Key-Area Research and Development Program of Guangdong Province(Grant number 2019B030330001)the National Natural Science Foundation of China(NSFC)(Grant numbers 92050110,91736106,11674390,91836302,91850117,and 11654003)X.H is partly supported by the China Postdoctoral Science Foundation(BX20190179 and 2020M670277).
文摘Nonreciprocity is important in both optical information processing and topological photonics studies.Conventional principles for realizing non reciprocity rely on magnetic fields,spatiotemporal modulation,or nonlinearity.Here we propose a generic principle for generating nonreciprocity by taking advantage of energy loss,which is usually regarded as harmful.The loss in a resonance mode induces a phase lag,which is independent of the energy transmission direction.When multichannel lossy resonance modes are combined,the resulting interference gives rise to nonreciprocity,with different coupling strengths for the forward and backward directions,and unidirectional energy transmission.This study opens a new avenue for the design of nonreciprocal devices without stringent requirements.
