Fig. 4: Strain-related hybridized states: comparing experiment and theory.
From: Strain control of hybridization between dark and localized excitons in a 2D semiconductor
Experimental (a) and modelled (b) PL spectra map of WSe2 vs. strain. Different shift rates vs. strain for the defect-related states D1, D2 and a dark excitonic state \({X}_{d}^{0}\) are evident. When \({X}_{d}^{0}\) is energy resonant with either D1 (around ε ~ 1.2%) or D2 (around ε ~ 2.4%) a strong increase in oscillator strength and avoided-crossing type behaviours are seen. Insets show on- and off- resonant alignment between dark- and defect-related excitons. See Supplementary Note 1 for the discussion of the differences between the experiment and theory.
