Fig. 4: Interlayer and intralayer exciton hybridization in the angle-aligned 3L WSe2/1L WS2 heterostructure.
From: Exciton Superposition across Moiré States in a Semiconducting Moiré Superlattice
a and b show the schematic band alignment and the real-space distribution of the hybridized excitons in 3L WSe2/1L WS2 moiré heterojunction. c shows the electric field dependence of reflectance contrast spectra measured from 3 L WSe2/1L WS2 device (D1). d is the zoom-in of a in the region between 1.62 eV and 1.72 eV at negative electric fields. e is the zoom-in of a in the region between 1.64 eV and 1.74 eV at positive electric fields. The dashed lines show the hybridized excitonic states obtained by fitting the peak positions. The dotted lines are the energies of unhybridized intralayer and interlayer excitons obtained from the fitting. A two-level hybridization model using one intralayer exciton and one interlayer exciton as bases is used to fit the peak positions in d, while a three-level hybridization model with one intralayer exciton and two different interlayer excitons is used to fit the peak positions in e. f shows the fractional composition of the hybridized exciton corresponding to the cyan line as a function of the electric field, expressed as the probability of each interlayer or intralayer exciton.
