Fig. 4
From: Dynamically tuned non-classical light emission from atomic defects in hexagonal boron nitride
Acoustic tuning of hexagonal boron nitride (h-BN) optical emission. a False-color plot of the time-integrated low-temperature emission from a single h-BN defect corresponding to zero-phonon line ZPL3 as a function of the driving surface acoustic wave (SAW) amplitude (\(\propto \sqrt {P_{{\mathrm{RF}}}}\)), showing the splitting of the optical transition into a doublet consisting of the lowest (Emin) and the highest (Emax) energy values separated by ΔE = Emax − Emin. The Emin and Emax values, extracted from fitting Eq. (1) to the experimental results recorded at different radio-frequency (RF) powers, are indicated by black dots. Energy splitting ΔE as a function of b the driving SAW amplitude and c the SAW-induced hydrostatic strain at the lithium niobate substrate surface. The solid lines are: power fits to the experimental data in b reproducing the \(\Delta E \propto (\sqrt {P_{{\mathrm{RF}}}} )^n\) dependence and a linear fit to the data shown in c
