MIT News June 22, 2023
While colloidal perovskite nanocrystals offer a great source of synthetically scalable, tunable photon sources, observation of two-photon quantum interference from the emission of any colloidal nanoparticle has not been previously reported. Researchers at MIT prepared large CsPbBr3 nanocrystals and observed direct evidence of interference between indistinguishable single photons sequentially emitted from a single nanocrystal. They measured Hong–Ou–Mandel interference from photons in CsPbBr3 nanocrystals, showing corrected visibilities of up to 0.56 ± 0.12 in the absence of any radiative enhancement or photonic architecture. According to the researchers their results demonstrate the unique potential of perovskite nanocrystals to serve as scalable, colloidal sources of indistinguishable single photons… read more. TECHNICAL ARTICLEÂ
Microscopic imaging shows the size uniformity of the perovskite nanocrystals. Credits: Courtesy of the researchers