Manipulating Topological Polaritons in Optomechanical Ladders
arxiv(2024)
摘要
We propose to manipulate topological polaritons in optomechanical ladders
consisting of an optical Su-Schrieffer-Heeger (SSH) chain and a mechanical SSH
chain connected through optomechanical (interchain) interactions. We show that
the topological phase diagrams are divided into six areas by four boundaries
and that there are four topological phases characterized by the Berry phases.
We find that a topologically nontrivial phase of the polaritons is generated by
the optomechanical interaction between the optical and mechanical SSH chains
even though they are both in the topologically trivial phases.
Counter-intuitively, six edge states appear in one of the topological phases
with only two topological nontrivial bands, and some edge states are localized
near but not at the boundaries of an open-boundary ladder. Moreover, a
two-dimensional Chern insulator with higher Chern numbers is simulated by
introducing proper periodical adiabatic modulations of the driving amplitude
and frequency. Our work not only opens a route towards topological polaritons
manipulation by optomachanical interactions, but also will exert a far-reaching
influence on designing topologically protected polaritonic devices.
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