Acoustic Modulation of Excitonic Complexes in hBN/WSe/hBN Heterostructures.

The interaction of high-frequency surface acoustic waves (SAWs) and excitons in van der Waals heterostructures (vdWHs) offers challenging opportunities to explore novel quantum effects and functionalities. We probe the interaction of neutral excitons, trions, and biexcitons with SAWs in a hBN/WSe/hBN vdWH. We show that neutral excitons respond weakly to the SAW stimulus at 5 K.