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Complex skin modes in non-Hermitian coupled laser arrays

Light(Science & Applications) 2022年第12期11卷 3002-3007页

作者： Yuzhou G.N.Liu Yunxuan Wei omid hemmatyar Georgios G.Pyrialakos Pawel S.Jung Demetrios N.Christodoulides Mercedeh Khajavikhan Ming Hsieh Department of Electrical and Computer Engineering University of Southern CaliforniaLos AngelesCA 90089USA CREOL The College of Optics&PhotonicsUniversity of Central FloridaOrlandoFL 32816-2700USA Faculty of Physics Warsaw University of TechnologyKoszykowa 7500-662 WarsawPoland Department of Physics&Astronomy Dornsife College of LettersArts&SciencesUniversity of Southern CaliforniaLos AngelesCA 90089USA

From biological ecosystems to spin glasses,connectivity plays a crucial role in determining the function,dynamics,and resiliency of a *** the realm of non-Hermitian physics,the possibility of complex and asymmetric exchange interactions(|κ_(ij)|≠|κ_(ji)|)between a network of oscillators has been theoretically shown to lead to novel behaviors like delocalization,skin effect,and bulk-boundary *** archetypical lattice exhibiting the aforementioned properties is that proposed by Hatano and Nelson in a series of papers in late *** the ramifications of these theoretical works in optics have been recently pursued in synthetic dimensions,the Hatano-Nelson model has yet to be realized in real *** makes the implementation of these lattices challenging is the difficulty in establishing the required asymmetric exchange interactions in optical *** this work,by using active optical oscillators featuring non-Hermiticity and nonlinearity,we introduce an anisotropic exchange between the resonant elements in a lattice,an aspect that enables us to observe the non-Hermitian skin effect,phase locking,and near-field beam steering in a Hatano-Nelson laser *** work opens up new regimes of phase-locking in lasers while shedding light on the fundamental physics of non-Hermitian systems.

关键词： Hermitian locking Complex

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