• Here, theoretically study the interaction of an ultrafast circularly polarized optical pulse with h-BN.

• The pulse redistributes electrons and generates valley-selective conduction band population.

• The fundamentally fastest valley polarization in h-BN monolayer has topological origin.

• For the large pulse duration, the valley polarization and conduction band population decrease.

• Valley polarization in h-BN may provide a basis for petahertz-band information processing.

  Prof. Prabath Hewageegana

 Physica E: Low-dimensional Systems and Nanostructures

Abstract :- https://doi.org/10.1016/j.physe.2021.114906