Fig. 1: Identifying single emitters on hBN.
From: Sharp zero-phonon lines of single organic molecules on a hexagonal boron-nitride surface
(a) Confocal-fluorescence intensity map of a large (non-annealed) hBN flake showing single spots and clusters of terrylene molecules that were excited by a vibronic transition with 532 nm light. b Antibunching histogram recorded from a typical isolated spot and normalized to unity, neglecting contributions from photon bunching at longer time scales. The dip does not fully extend to zero due to a relatively strong background in the fluorescence signal. This background was caused by leakage through the filter (532 nm Notch) of the high-intensity excitation light (17 kW/cm2), together with a weak Raman signal from Si (520 cm−1) and hBN (1365 cm−1). The red curve is a fit of the function \({g}_{{ab}}^{(2)}\left(\tau \right)=1-c{e}^{-|\tau |/{\tau }_{f}}\) to the data points.
