Proceedings of MATSUS23 & Sustainable Technology Forum València (STECH23) (MATSUS23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.175
Publication date: 22nd December 2022
Long-range coherence and correlations between atoms and electrons in solids are the cornerstones for developing future quantum materials and devices. In 1954, Dicke described correlated spontaneous emission from closely packed quantum emitters, forming the theoretical basis of superradiance and superfluorescence. It has remained an open challenge to observe such phenomena with nanometer spatial resolution, precisely the critical scale at which the collective correlations occur. In my talk, I will demonstrate superfluorescence triggered by ultra-fast free electrons pulses for the first time using superlattices of lead-halide perovskite quantum dots. These new materials have a significant interaction cross-section with electrons, efficient emission, and fast radiative rates that allow the buildup of correlation between the exciton before dephasing. The emission is toggled between spontaneous to superfluorescence by controlling the excitation area. The correlated emission is faster, brighter, and narrower than the spontaneous emission. On-demand correlated emission has applications in non-classical light sources, superfluorescence biomarkers for electron microscopy, and enhanced detectors.
The presenting authors thank the hard work of all contributors: Orr Be'er, Alexey Gorlach, Alina Nagel, Reut Shechter, Yaniv Kurman, Marc Fouchier, Ido Kaminer.
This project was funded by the European Union’s Horizon 2020 research and innovation program, under grant agreement No. 949682-ERC-HeteroPlates.
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