Time-Resolved ARPES Study of Floquet-Bloch States in Monolayer Tungsten Disulfide

Floquet engineering of the band structure has attracted much interest recently. This is usually achieved by using an intense light field to drive the system out of equilibrium and gain access to novel quantum effects, such as Floquet-Bloch states in a topological insulator, which is otherwise inaccessible in the equilibrium condition [1–3]. Time-resolved ARPES (Tr-ARPES) has been at the forefront of studying these emergent phenomena in various quantum materials such as Bismuth selenide and bulk Tungsten diselenide [1,2,4]. Here we report the observation of Floquet-Bloch states in monolayer Tungsten Disulfide using Tr-ARPES. We further discuss the impact of the driving field on the band structure.

 

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