Extended Data Fig. 6: Optical spectra of Al2O3/WSe2 systems.
From: High-order superlattices by rolling up van der Waals heterostructures
a, b, Raman (a) and photoluminescence (b) spectra of monolayer (1L) WSe2 (black line), Al2O3/1L WSe2 (blue line) heterostructure and Al2O3/1L WSe2 vdW superlattice (red line). c, d, Raman (c) and photoluminescence (d) spectra of bilayer (2L) WSe2 (black line), Al2O3/2L WSe2 (blue line) heterostructure and Al2O3/2L WSe2 vdW superlattice (red line).
