Fig. 4: Impact of the gold nanoparticle on the valley-selective excitation of 1L-MoS2. | Nature Communications

Fig. 4: Impact of the gold nanoparticle on the valley-selective excitation of 1L-MoS2.

From: Influence of resonant plasmonic nanoparticles on optically accessing the valley degree of freedom in 2D semiconductors

Fig. 4

a Total intensity of the external in-plane nearfield in the plane of the monolayer upon σ+ polarized excitation with a focused Gaussian beam (NA = 0.9) positioned at the center of the GNP (left) and a plane wave (right). b Respective individual contributions of σ+ and σ− polarized components in dependence on the distance from the GNP's center along the x-axis (y = 0). The normalization is chosen such that the sum of both curves peaks to 1. Note that identical results are obtained for σ− polarized excitation up to exchanged labels σ±, respectively. The shaded area marks the size of the GNP. c Measured DOCP of valley-specific emission from embedded 1L-MoS2 decorated with monodispersed GNPs upon σ+-polarized wide-field illumination and collected through a 660 nm bandpass filter.

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