Figure 1: Excitons, biexcitons and trions in monolayer MoSe2.
From: Neutral and charged inter-valley biexcitons in monolayer MoSe2
(a) Optical microscope image of the monolayer sample. (b) Photoluminescence spectrum taken at 13 K featuring two peaks near ∼1,650 and ∼1,620 meV attributed to the exciton (X) and trion (T), respectively. The excitation laser spectrum for the nonlinear spectroscopy experiments is indicated by the dashed red curve. (c) Lowest-energy direct-gap transitions at the K and K′ valleys associated with A-excitons are accessible using σ+ and σ− circularly polarized light, respectively. The valence band associated with the B-exciton is omitted for clarity. (d) Illustration of an exciton (X), trion (T), neutral biexciton (XX) and charged biexciton (XT) in monolayer MoSe2.
