Figure 3: Single-particle spectra for a WS2 ribbon irradiated with circularly polarized light.
From: All-optical materials design of chiral edge modes in transition-metal dichalcogenides
(a) In equilibrium, the ribbon hosts two trivial edge states localized at opposing edges. (b) A red-detuned pump field induces a hybridization gap at the bottom of the CB, which scales linearly in A until closing again at a critical pump strength. (c) A blue-detuned pump couples the equilibrium valence and CBs, inducing gaps both at the bottom of the conduction and top of the VB, each hosting two chiral edge modes. (d) Hybridization gaps at the opposite valley K' lead merely to a trivial band inversion, depicted here for the top of the VB for blue detuning.
