Light-induced emergent phenomena in 2D materials and topological materials

Light-matter interaction in 2D and topological materials provides a fascinating control knob for inducing emergent, non-equilibrium properties achieving new functionalities the ultrafast time scale (from fs to ps). Over past decade, intriguing light-induced phenomena, e.g., Bloch-Floquet states photo-induced phase transitions, have been reported experimentally, but many still await experimental realization. In this Review, we discuss recent progress on which light field could act as time-periodic drive Floquet states, induce structural transitions quantum materials, couple with spin various pseudospins, nonlinear optical responses that are affected by geometric phase. Perspectives opportunities of proposed phenomena well open challenges also discussed.