Chiral and antichiral edge states in gyromagnetic photonic crystals under magnetic and pseudomagnetic fields
SHIYU LIU 1 YUTING YANG 2 LIWEI SHI 1 ENYUAN WANG 3 ZHI HONG HANG 41.School of Materials and Physics,China University of Mining and Technology,Xuzhou 221116,China2.School of Materials and Physics,China University of Mining and Technology,Xuzhou 221116,China;State Key Laboratory of Millimeter Waves,Southeast University,Nanjing 210096,China3.School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China4.School of Physical Science and Technology&Collaborative Innovation Center of Suzhou Nano Science and Technology,Soochow University,Suzhou 215006,China;Institute for Advanced Study,Soochow University,Suzhou 215006,China引用收藏分
摘要：Inhomogeneous uniaxial strain-induced lattice deformations result in the Dirac point shift,leading to a strong syn-thetic pseudomagnetic field.The chiral edge state in the Haldane model and the antichiral edge state in the modified Haldane model 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.
DOI: 10.1364/PRJ.568411