
Tailoring the spatial symmetry of light waveforms to match the lattice of a hexagonal boron nitride monolayer enables optical control of time-reversal symmetry breaking and the realization of the topological Haldane model, allowing ultrafast switching between band structure configurations.


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We introduce&nbsp;strong tailored light-wave-driven&nbsp;time-reversal symmetry breaking&nbsp;in&nbsp;monolayer hexagonal boron nitride, realizing a sub-laser-cycle&nbsp;controllable&nbsp;analogue of the topological model of Haldane and inducing non-resonant valley polarization.

Light-wave-controlled Haldane model in monolayer hexagonal boron nitride - Nature

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Ultrafast Optical Control of Topological Phases in Monolayer Hexagonal Boron Nitride
