Inhomogeneous uniaxial strain-induced lattice deformations result in the Dirac point shift,leading to a strong synthetic pseudomagnetic field.The chiral edge state in the Haldane model and the antichiral edge state in...Inhomogeneous uniaxial strain-induced lattice deformations result in the Dirac point shift,leading to a strong synthetic pseudomagnetic field.The chiral edge state in the Haldane model and the antichiral edge state in the modified Haldanemodel can be realized in gyromagnetic photonic crystals,immersed in external real magnetic fields.Here,the interplay of the real-and pseudo-magnetic fields is investigated based on the onsite magnetization modulation and the uniaxial strain within gyromagnetic photonic crystals,thereby resulting in photonic band deformations including the shift of the chiral edge states and the lift of the degenerate antichiral edge states.The experiment is further performed to observe the imbalanced transport of these edge states on two opposite sides.Our findings can help to deeply explore rich and significant physics of synthetic gauge fields,and facilitate designs of photonic functional devices,such as the proposed unidirectional multichannel waveguide.展开更多
基金Fundamental Research Funds for the Central Universities(2023ZDYQ11003)National Natural Science Foundation of China(12274315,52227901)+1 种基金China Postdoctoral Science Foundation(2023M743784)State Key Laboratory of Millimeter Waves(K202407)。
文摘Inhomogeneous uniaxial strain-induced lattice deformations result in the Dirac point shift,leading to a strong synthetic pseudomagnetic field.The chiral edge state in the Haldane model and the antichiral edge state in the modified Haldanemodel can be realized in gyromagnetic photonic crystals,immersed in external real magnetic fields.Here,the interplay of the real-and pseudo-magnetic fields is investigated based on the onsite magnetization modulation and the uniaxial strain within gyromagnetic photonic crystals,thereby resulting in photonic band deformations including the shift of the chiral edge states and the lift of the degenerate antichiral edge states.The experiment is further performed to observe the imbalanced transport of these edge states on two opposite sides.Our findings can help to deeply explore rich and significant physics of synthetic gauge fields,and facilitate designs of photonic functional devices,such as the proposed unidirectional multichannel waveguide.
