Figure 2 (IMAGE)

Institute for Basic Science

Figure 2

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Stacking sequence-dependent dark exciton modulation. Left, schematic of WS2 (top)/WSe2 (bottom) hetero-bilayer and their corresponding core-spong PL. A new excitonic feature (red color peak) emerges at the hetero-bilayer region due to the downshifting of the Q-band (inset) only at the heterostructure. Right, opposite stacking of WSe2 (top)/WS2 (bottom) hetero-bilayer and their corresponding PL. The previous dark-exciton peak (red color peak) completely vanished, whereas another new excitonic feature (cyan color peak) emerged at the hetero-bilayer region due to the downshifting of the Q-band (inset) at the heterostructure.

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Institute for Basic Science

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