Fig. 1: Single-photon emission in a locally strained WSe2 monolayer sample with alignment marks. | Nature Communications

Fig. 1: Single-photon emission in a locally strained WSe2 monolayer sample with alignment marks.

From: Photoluminescence imaging of single photon emitters within nanoscale strain profiles in monolayer WSe2

Fig. 1

a Schematic of single-photon emitter (SPE) fabrication by nanoindentation in a WSe2 monolayer transferred onto a substrate with an alignment pattern. b Optical image of the sample showing arrays of alignment marks and nanoindents. The WSe2 monolayer border is highlighted by green dashed line. c Photoluminescence (PL) spectrum from a selected SPE. The spectral part detected in the experiment is highlighted with red color. Spectral peak of the free bright neutral exciton \({X}_{b}^{0}\) at λ = 710.5 nm is scaled up by 103. The inset shows typical polarization-resolved spectrally integrated PL signal from an SPE. d Second-order correlation function g(2)(τ) measured for the SPE spectral peak (blue dots) together with fit (red curve), which demonstrates antibunching.

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