Lubin, GurTenne, RonUlku, Arin CanAntolovic, Ivan MichelBurri, SamuelKarg, SeanYallapragada, Venkata JayasuryaYaniv, GiliKazes, MiriAmgar, DanielFrenkel, NadavBruschini, ClaudioCharbon, EdoardoOron, Dan2023-07-312023-07-312023-07-312023-01-0110.1117/12.2650463https://infoscience.epfl.ch/handle/20.500.14299/199526WOS:001011711100002Semiconductor nanocrystals feature multiply-excited states that display intriguing physics and significantly impact nanocrystal-based technologies. Fluorescence supplies a natural probe to investigate these states. Still, direct observation of multiexciton fluorescence has proved elusive to existing spectroscopy techniques. Heralded Spectroscopy is a new tool based on a breakthrough single-particle, single-photon, sub-nanosecond spectrometer that utilizes temporal photon correlations to isolate multiexciton emission. This proceedings paper introduces Heralded Spectroscopy and reviews some of the novel insights it uncovered into exciton-exciton interactions within single nanocrystals. These include weak exciton-exciton interactions and their correlation with quantum confinement, biexciton spectral diffusion, multiple biexciton species and biexciton emission polarization.Computer Science, Interdisciplinary ApplicationsOpticsComputer Sciencequantum dotsmultiexcitonsbiexciton binding energysingle-particle spectroscopyspad arraysperovskite nanocrystalstext::conference output::conference proceedings::conference paper