Fig. 1: Cryogenic photoluminescence and differential reflectivity spectra of MoSe2-WSe2 heterobilayer and heterotrilayer.
From: Moiré excitons in MoSe2-WSe2 heterobilayers and heterotrilayers

a, b Photoluminescence (black and gray) and differential reflectivity (blue and dark cyan) spectra of twisted HBL and HTL MoSe2-WSe2 at 3.2 K. The luminescence was excited with linearly polarized excitation laser at 1.85 eV and scaled in intensity below 1.47 eV by a factor of 5 in both graphs.