Fig. 3.

Polarisation properties of WSe${}_2$ coupled to GaP nano-antennas. a Photoluminescence spectra for 1L-WSe${}_2$ on a GaP nano-antenna (g = 65 nm, r = 400 nm) for a laser excitation linearly polarised along X- and Y-axes of the dimer (defined as in Fig. 1). b Dark-field microscopic images and related scattered light intensity profiles for two GaP nano-antennas ($r$ = 400 nm) covered with 1L-WSe${}_2$. The scattered light intensity profiles are taken along the long axes (Y) of the dimer as shown by the dotted lines. The top (bottom) images and left (right) graphs correspond to the dimers without (with) a gap. c Comparison of 1L-WSe${}_2$ PL intensity as a function of the orientation of linearly polarised excitation for the nano-antennas in b. Red (dark blue) shows the dependence for the dimer with (without) a gap