Fig. 2: Strain-induced excitonic response in transmittance and PL with large tunability at T = 5 K.
From: Probing dark exciton navigation through a local strain landscape in a WSe2 monolayer
a For device D3, we present the transmittance dip associated with XA:1s with Vp = 0 (before contacting the heterostructure with the fiber) and with Vp = 10 V (the maximum voltage we can apply to the piezo-positioner). The XA:1s feature shifts by 35 meV over this range. b The fiber-collected PL has a feature X0 that matches in energy with XA:1s at Vp = 0. At Vp = 10 V, peaks as low as 1.38 eV appear. c PL spectra as a function of piezo-positioner voltage shows two branches of features. The branch that is lower in energy shifts by 390 meV from the unstrained X0 resonance.
