Controlling topological modes in photonic systems remains a fundamental challenge,as conventional approaches rely on global lattice modifications and lack topological phase engineering of the induced non-trivial state...Controlling topological modes in photonic systems remains a fundamental challenge,as conventional approaches rely on global lattice modifications and lack topological phase engineering of the induced non-trivial states.Here,we reveal that staggered onsite edge potential(SOEP)modulation breaks mirror symmetry in folded edge states,inducing edge-confined Wannier function deviations and thus driving edge bands into distinct topological phases.The emergence of resulting higher-order localized modes is further confirmed.展开更多
基金National Natural Science Foundation of China(62175180,11874245,12004425)。
文摘Controlling topological modes in photonic systems remains a fundamental challenge,as conventional approaches rely on global lattice modifications and lack topological phase engineering of the induced non-trivial states.Here,we reveal that staggered onsite edge potential(SOEP)modulation breaks mirror symmetry in folded edge states,inducing edge-confined Wannier function deviations and thus driving edge bands into distinct topological phases.The emergence of resulting higher-order localized modes is further confirmed.
